<?xml version='1.0' encoding='UTF-8'?><?xml-stylesheet href="http://www.blogger.com/styles/atom.css" type="text/css"?><feed xmlns='http://www.w3.org/2005/Atom' xmlns:openSearch='http://a9.com/-/spec/opensearchrss/1.0/' xmlns:georss='http://www.georss.org/georss' xmlns:thr='http://purl.org/syndication/thread/1.0'><id>tag:blogger.com,1999:blog-8145289502364930990</id><updated>2011-03-11T16:36:58.315-08:00</updated><title type='text'>Electronic &amp; Computer</title><subtitle type='html'></subtitle><link rel='http://schemas.google.com/g/2005#feed' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/posts/default'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/'/><link rel='hub' href='http://pubsubhubbub.appspot.com/'/><link rel='next' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default?start-index=26&amp;max-results=25'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email></author><generator version='7.00' uri='http://www.blogger.com'>Blogger</generator><openSearch:totalResults>351</openSearch:totalResults><openSearch:startIndex>1</openSearch:startIndex><openSearch:itemsPerPage>25</openSearch:itemsPerPage><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5422614474028917534</id><published>2010-06-07T21:08:00.000-07:00</published><updated>2011-03-11T16:20:31.893-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='electronic circuit'/><title type='text'>electronic circuit link</title><content type='html'>&lt;ol&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/simple-adjustable-voltage-source/"&gt;Simple  Adjustable Voltage Source&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/68/"&gt;Low Voltage, High  Current Time Delay Circuit&lt;/a&gt; &lt;/li&gt;&lt;li&gt; &lt;a href="http://www.eleccircuit.com/67/"&gt;LM317T Voltage  Regulator with Pass Transistor&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/interfacing-5-volt-cmos-to-12-volt-25-watt-loads/"&gt;Interfacing  5 volt CMOS to 12 volt/ 25 Watt Loads&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/high-current-regulated-supply/"&gt;High  Current Regulated Supply by LM317&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/12-volt-30-amp-by-7812/"&gt;High  Current Power Regulator 12Volt 30Amp by 7812+2N3055&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/cmos-toggle-flip-flop-using-push-button/"&gt;CMOS  Toggle Flip Flop Using Push Button&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.elecfree.com/9%20Second%20LED%20Timer%20and%20Relay%20Circuit"&gt;9  Second LED Timer and Relay Circuit&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/9-second-digital-readout-countdown-timer/"&gt;9  Second Digital Readout Countdown Timer&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/3-transistor-audio-amp-50-milliwatt/"&gt;3  Transistor Audio Amp (50 milliwatt)&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/thermistor/"&gt;Thermistor&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/2-cell-lithium-ion-charger/"&gt;2 Cell  Lithium Ion Charger&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/battery-check-procedures/"&gt;Battery  Check procedures&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/salt-water-battery/"&gt;Salt  Water Battery&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/simple-but-reliable-car-battery-tester/"&gt;Simple  but reliable car battery tester&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/nite-rider-lights/"&gt;Nite  Rider Lights&lt;/a&gt; &lt;/li&gt;&lt;li&gt;&lt;a href="http://www.eleccircuit.com/12v-to-20v-converter-for-audio-amplifier/"&gt;12V  to +-20V converter (for audio amplifier)&lt;br /&gt;&lt;/a&gt; &lt;/li&gt;&lt;/ol&gt;&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic-circuit.html"&gt;Source:&lt;/a&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5422614474028917534?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5422614474028917534/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/06/electronic-circuit-link.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5422614474028917534'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5422614474028917534'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/06/electronic-circuit-link.html' title='electronic circuit link'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-4590093279369578021</id><published>2010-05-31T23:35:00.000-07:00</published><updated>2011-03-11T16:20:31.923-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Digital circuit'/><title type='text'>Digital logic circuit</title><content type='html'>&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;&lt;span style="font-size:130%;"&gt;This is digital logic  circuit. Which use digital IC kind CMOS and TTL  many the number.&lt;br /&gt;It  be the character gate very the circuit has appropriately. It is the  measuring instrument logic&lt;br /&gt;show electricity position low or high get. May show with LED  or utter  hear all right.&lt;br /&gt;The gate IC come to use produce sound frequency or the other circuit    &lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/digital-logic-circuit/"&gt;&lt;span style="font-weight: bold;"&gt;more&lt;/span&gt;&lt;/a&gt;&lt;/span&gt;&lt;br /&gt;&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-4590093279369578021?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/4590093279369578021/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/digital-logic-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4590093279369578021'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4590093279369578021'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/digital-logic-circuit.html' title='Digital logic circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-8872838814303105819</id><published>2010-05-27T07:29:00.000-07:00</published><updated>2011-03-11T16:20:31.945-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Inverter'/><title type='text'>Duracell Portable Inverter – 3000 Watts</title><content type='html'>The best contemporary technology combined with traditional Marantz  quality. That’s what the Marantz AV8003 is all about. It’s more than  just an outstanding A/V processor.   click to see/view price of &lt;a href="http://www.eleccircuit.com/duracell-portable-inverter-3000-watts-model-813-3007/"&gt;&lt;span style="font-weight: bold;"&gt;Duracell Portable Inverter – 3000 Watts&lt;/span&gt;&lt;/a&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-8872838814303105819?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/8872838814303105819/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/duracell-portable-inverter-3000-watts.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/8872838814303105819'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/8872838814303105819'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/duracell-portable-inverter-3000-watts.html' title='Duracell Portable Inverter – 3000 Watts'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-8126868248604460811</id><published>2010-05-19T21:32:00.000-07:00</published><updated>2011-03-11T16:20:31.969-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Alarm'/><title type='text'>Circuit Alarm</title><content type='html'>&lt;span style=";font-family:Arial,Helvetica,sans-serif;font-size:100%;"  &gt;This be simple  circuit alarm diagram for extremely the electronics everyone.&lt;br /&gt;  Try build keep be usable example , alarm system of the usability&lt;br /&gt;  be  home security alarm circuit, car alarm circuit, fire alarm  circuit,&lt;br /&gt;  burglar alarm circuit etc. By compose many circuits as follows �&lt;br /&gt;&lt;br /&gt;   &lt;a href="http://www.elecfree.com/electronic/proximity-detector-using-cs209/"&gt;Proximity  Detector Using CS209&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/rain-alarm-using-ne555/"&gt;Rain  Alarm using NE555&lt;/a&gt;&lt;br /&gt;  &lt;a href="http://www.elecfree.com/electronic/low-cost-fire-alarm-circuit-using-transistor/"&gt;Low  Cost Fire Alarm Circuit Using Transistor&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/fire-alarm-using-thermistor/"&gt;Fire  Alarm Using Thermistor&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/chamberlain-wireless-alert-system/"&gt;Chamberlain  Wireless Alert System&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/water-softener-circuit-using-ne555/"&gt;Water  Softener Circuit using NE555&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/8-zone-water-sensor-alert-kit/"&gt;8-Zone  Water Sensor Alert Kit&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/water-sensor-alarm/"&gt;Water  Sensor Alarm&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/wireless-portable-video-security-system-lcd-outdoor-camera/"&gt;Wireless  Portable Video Security System LCD - Outdoor Camera&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/skylink-wt-433-window-door-sensor/"&gt;Skylink  WT-433 Window-Door Sensor&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/personal-alarm-using-ic-74hc04/"&gt;Personal  Alarm using IC 74HC04&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/lamp-flashing-alarm-automatic/"&gt;Lamp  flashing alarm automatic&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/car-alarm-simulator/"&gt;Car  Alarm Simulator&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/car-burglar-alarm-system-with-radio-wave-signal/"&gt;Car  Burglar Alarm system with radio wave signal&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/car-burglar-alarm-timer-delay-using-ne556/"&gt;Car  Burglar Alarm timer delay using NE556&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/simple-metronome-using-transistor/"&gt;Simple  Metronome using transistor&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/warbling-alarm-circuit-with-tone-generator/"&gt;Warbling  Alarm Circuit with tone Generator&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/wireless-home-security-system-calls-your-cell-phone/"&gt;Wireless  Home Security System Calls Your Cell Phone&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/home-and-vehicle-2-zone-alarm-pager-system/"&gt;Home  and Vehicle 2-Zone Alarm Pager System&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/emergency-power-siren-6-watt/"&gt;Emergency  power siren 6 watt&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/water-sensor-alarm-kit/"&gt;Water  Sensor Alarm Kit&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/car-alarm-simulator-by-lm324/"&gt;Car  Alarm Simulator by LM324&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/water-sensor-alarm-using-lm380/"&gt;Water  Sensor Alarm using LM380&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/two-tone-alarm-generator-using-lm3900/"&gt;Two  Tone Alarm generator using LM3900&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/electronic-watch-dog-kit/"&gt;Electronic  Watch Dog Kit&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/mini-emergency-light-by-9013-transistor/"&gt;Mini  Emergency Light by 9013 transistor&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/headlight-alarm/"&gt;Headlight  Alarm&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/powerful-siren-by-bc337/"&gt;Powerful  Siren by BC337&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/one-ic-two-tones-siren-with-ic-4093/"&gt;One-IC  two-tones Siren with IC 4093&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/electronic-siren-by-ic-digital/"&gt;Electronic  Siren by IC Digital&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/single-zone-digital-cmos-alarm/"&gt;Single  Zone Digital CMOS Alarm&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/miniature-loop-alarm/"&gt;Miniature  Loop Alarm&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/red-alert-startrek-alarm-by-ic-555/"&gt;Red  Alert Startrek Alarm by IC 555&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/american-police-car-siren-by-ic-555/"&gt;American  Police Car Siren by IC 555&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/british-police-car-siren-by-ic-555/"&gt;British  Police Car Siren by IC 555&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/two-hijack-alarms-by-4001/"&gt;Two  HiJack Alarms by 4001&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/water-alarm-with-lm350/"&gt;Water  Alarm with LM380&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/two-tone-alarm-with-ic-lm3900/"&gt;Two  Tone Alarm with IC LM3900&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/mosfet-6-watt-siren/"&gt;Mosfet  6 Watt Siren&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/travel-touch-alarm/"&gt;Travel  Touch Alarm&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/assortment-of-siren-circuits/"&gt;Assortment  of Siren Circuits&lt;/a&gt;&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-8126868248604460811?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/8126868248604460811/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/circuit-alarm.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/8126868248604460811'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/8126868248604460811'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/circuit-alarm.html' title='Circuit Alarm'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-1709245628934526489</id><published>2010-05-13T10:17:00.000-07:00</published><updated>2011-03-11T16:20:31.989-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Digital circuit'/><title type='text'>schmitt trigger comparator</title><content type='html'>&lt;h2 class="r"&gt;&lt;a href="http://www.eleccircuit.com/lm555-timer-used-as-a-voltage-comparator-or-schmitt-trigger/" class="l" onmousedown="return  clk(this.href,'','','res','1','','0CAcQFjAA')"&gt;LM555 Timer Used As A  Voltage &lt;em&gt;Comparator&lt;/em&gt; Or &lt;em&gt;Schmitt Trigger&lt;/em&gt;&lt;/a&gt;&lt;/h2&gt;&lt;br /&gt;The next section shows how the LM555 timer could be used as a voltage &lt;em&gt;comparator&lt;/em&gt;  or a wide offset Scmitt &lt;em&gt;Trigger&lt;/em&gt;. Applications for which it &lt;b&gt;...&lt;br /&gt;&lt;br /&gt;&lt;/b&gt;&lt;h2 class="r"&gt;&lt;a href="http://www.eleccircuit.com/touch-motor-control-by-scr-and-schmitt-trigger/" class="l" onmousedown="return  clk(this.href,'','','res','2','','0CAkQFjAB')"&gt;Touch Motor Control by  SCR and &lt;em&gt;Schmitt Trigger&lt;/em&gt;&lt;/a&gt;&lt;/h2&gt; This circuit designs for control DC Motor 12Volt. By use the touch once  Motor as a result turn go to once. When use a finger touches the &lt;b&gt;...&lt;/b&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-1709245628934526489?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/1709245628934526489/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/schmitt-trigger-comparator.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/1709245628934526489'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/1709245628934526489'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/schmitt-trigger-comparator.html' title='schmitt trigger comparator'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-4190176089360282702</id><published>2010-05-13T10:05:00.000-07:00</published><updated>2011-03-11T16:20:32.008-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Oscillator Generator'/><title type='text'>cmos crystal oscillator circuit</title><content type='html'>&lt;h2 class="r"&gt;&lt;a href="http://www.eleccircuit.com/crystal-oscillator-with-ic-digital-74hc04/" class="l" onmousedown="return  clk(this.href,'','','res','3','','0CBEQFjAC')"&gt;&lt;em&gt;Crystal Oscillator&lt;/em&gt;  with IC Digital 74HC04&lt;/a&gt;&lt;/h2&gt;&lt;br /&gt;The &lt;em&gt;circuit&lt;/em&gt; above is a parallel resonant &lt;em&gt;oscillator circuit&lt;/em&gt;.  &lt;b&gt;...&lt;/b&gt; 32.768 KHz &lt;em&gt;oscillator&lt;/em&gt; using a watch &lt;em&gt;crystal&lt;/em&gt;  · &lt;em&gt;Cmos&lt;/em&gt; Logic Clock &lt;em&gt;Oscillator&lt;/em&gt; &lt;b&gt;...&lt;br /&gt;&lt;br /&gt;&lt;/b&gt;&lt;h2 class="r"&gt;&lt;a href="http://www.eleccircuit.com/xtal-oscillator-frequency-by-74ls04/" class="l" onmousedown="return  clk(this.href,'','','res','6','','0CBcQFjAF')"&gt;X'tal &lt;em&gt;Oscillator&lt;/em&gt;  Frequency by 74LS04&lt;/a&gt;&lt;/h2&gt;This &lt;em&gt;circuit&lt;/em&gt; may used as clock frequency for many digital  circuits. &lt;b&gt;...&lt;/b&gt; 32.768 KHz &lt;em&gt;oscillator&lt;/em&gt; using a watch &lt;em&gt;crystal&lt;/em&gt;  · &lt;em&gt;Cmos&lt;/em&gt; Logic Clock &lt;em&gt;Oscillator&lt;/em&gt; by Ic 4011 &lt;b&gt;...&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;&lt;h2 class="r"&gt;&lt;a href="http://www.eleccircuit.com/cmos-crystal-frequency-multiplier/" class="l" onmousedown="return  clk(this.href,'','','res','2','','0CA8QFjAB')"&gt;&lt;em&gt;CMOS Crystal&lt;/em&gt;  Frequency Multiplier&lt;/a&gt;&lt;/h2&gt;A disadvantage is that such a &lt;em&gt;circuit&lt;/em&gt; would quickly  become quite &lt;b&gt;...&lt;/b&gt; 32.768 KHz &lt;em&gt;oscillator&lt;/em&gt; using a watch &lt;em&gt;crystal&lt;/em&gt;  · &lt;em&gt;Cmos&lt;/em&gt; Logic Clock &lt;b&gt;...&lt;/b&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-4190176089360282702?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/4190176089360282702/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/cmos-crystal-oscillator-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4190176089360282702'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4190176089360282702'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/cmos-crystal-oscillator-circuit.html' title='cmos crystal oscillator circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-1127837489972356249</id><published>2010-05-07T07:14:00.000-07:00</published><updated>2011-03-11T16:20:32.079-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='rf transmitter'/><category scheme='http://www.blogger.com/atom/ns#' term='FM'/><title type='text'>FM Stereo Transmitter with IC BA1404</title><content type='html'>ntegrated FM radio transmitter that I like better for ซ Pure Born BA1404 IC is a single signal in stereo to FM radio quality as the mineral quartz frequency with Bristol. Not a signal stir Suitable for the study of radio transmitters. Improve the balance. Send to a higher power. Frequency is 88MHZ - 108MHz frequency area covered. 3V low power and culture is running. You may also be adapted to any set of signals for iphone &lt;a href="http://www.eleccircuit.com/fm-stereo-transmitter-with-ic-ba1404/"&gt;&lt;span style="font-weight:bold;"&gt;Link&lt;/span&gt;&lt;/a&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-1127837489972356249?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/1127837489972356249/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/fm-stereo-transmitter-with-ic-ba1404.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/1127837489972356249'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/1127837489972356249'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/fm-stereo-transmitter-with-ic-ba1404.html' title='FM Stereo Transmitter with IC BA1404'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5504232666184932325</id><published>2010-05-07T07:13:00.000-07:00</published><updated>2011-03-11T16:20:32.093-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Digital circuit'/><title type='text'>Simple Digital Counter by 4026</title><content type='html'>Range from simple digital ICs No. 4026 as driver tubes and a range of LED 7 counted. Has great convenience.&lt;br /&gt;For experiments to learn more digital electronic circuit according to &lt;span style="font-weight:bold;"&gt;&lt;a href="http://www.eleccircuit.com/simple-digital-counter-by-4026/"&gt;Link&lt;/a&gt;&lt;/span&gt;.&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5504232666184932325?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5504232666184932325/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/simple-digital-counter-by-4026.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5504232666184932325'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5504232666184932325'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/simple-digital-counter-by-4026.html' title='Simple Digital Counter by 4026'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-7278805658225966199</id><published>2010-05-05T22:41:00.000-07:00</published><updated>2011-03-11T16:20:32.110-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Digital circuit'/><title type='text'>One shot circuit</title><content type='html'>&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;The one short  circuit, be the circuit delays one kind. It work with something trigger  of logic digital signal.&lt;br /&gt;It cause way change output follow while note. Which there are various  circuit examples for consider,&lt;br /&gt;choose use cough abundantly that is appropriate.      &lt;br /&gt;&lt;br /&gt;    &lt;a href="http://www.elecfree.com/electronic/555-timer-mono-stable-one-shot-circuit/"&gt;555  timer Mono stable (one shot) circuit&lt;/a&gt;&lt;br /&gt;19 Apr 2007 ... The two circuits below illustrate using the 555 timer to  close a relay&lt;br /&gt;for a predetermined amount of time by pressing a momentary N/O push ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/digital-circuit/one-shot-timer-by-ic-555/"&gt;One  - Shot Timer by IC 555&lt;/a&gt;&lt;br /&gt;This is digital circuit, It is One - Shot Timer make by IC 555. Power  supply 5-15V,&lt;br /&gt;Output pin 3, Input pin 2 Trigger input. One - Shot Timer by IC 555.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/one-shot-by-ic-quad-timer-558/"&gt;One-Shot  By IC Quad Timer 558&lt;/a&gt;&lt;br /&gt;23 Jul 2007 ... One-Shot By IC Quad Timer LM558 When mention the circuit &lt;br /&gt;One Shot friends at take an interest digital side may know good that how  much is it ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/simple-touch-switch-one-shot-by-4011/"&gt;Simple  Touch Switch One Shot by 4011&lt;/a&gt;&lt;br /&gt;17 Apr 2008 ... Here is a simple touch control switch, I use IC 4011.  Logic HI&lt;br /&gt;at output is timer pulse delay control by C1 1S = C1 4.7uF(micro farad),  ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/monostable-flip-flop/"&gt;Monostable  Flip Flop&lt;/a&gt;&lt;br /&gt;19 Apr 2007 ... The circuit then remains in a stable state until the  next input.&lt;br /&gt;The one shot circuit on the right employs two logic inverters which are  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/one-shot-by-ic-74ls02/"&gt;One-Shot  by IC 74LS02&lt;/a&gt;&lt;br /&gt;15 Aug 2007 ... This is circuit Digital One-Shot, use IC TTL Digital  74LS02 :&lt;br /&gt;QUAD 2-INPUT NOR GATE . Time Output = 0.8xRxC Related Links More digital  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/monostable-multivibrator-by-4538/"&gt;Monostable  Multivibrator by 4538&lt;/a&gt;&lt;br /&gt;26 Mar 2008 ... When you trigger the chip the output sends off one  single pulse or one ...&lt;br /&gt;More circuit about one shot · One-Shot By IC Quad Timer 558 ...&lt;br /&gt;&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-7278805658225966199?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/7278805658225966199/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/one-shot-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7278805658225966199'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7278805658225966199'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/05/one-shot-circuit.html' title='One shot circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5715502922698599918</id><published>2010-04-15T21:14:00.000-07:00</published><updated>2011-03-11T16:20:32.126-08:00</updated><title type='text'>Switch circuit</title><content type='html'>&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;&lt;a href="http://www.elecfree.com/electronic/automatic-lamp-control-with-light-sensitive-switch/"&gt;Automatic  Lamp Control with Light Sensitive Switch&lt;/a&gt;&lt;br /&gt;7 Feb 2008 ... The circuit above is an automatic switch which functions  in absence of light.&lt;br /&gt;The IC 4060 works as an oscillator and the generated signal is ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/light-sensitive-switch-with-ldr-2n2926/"&gt;Light  Sensitive Switch with LDR + 2N2926&lt;/a&gt;&lt;br /&gt;18 May 2007 ... Click to View Circuit Light Sensitive Switch with LDR +  2N2926&lt;br /&gt;This be circuit warn when be become dark, or Light sensitive switch.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/electronic-control/sound-scr-swith-by-ic-1458-scr-c106d/"&gt;Sound  SCR Switch by IC 1458 &amp;amp; SCR C106D&lt;/a&gt;&lt;br /&gt;This is Sound SCR Switch Using IC 1458 &amp;amp; SCR C106D, It is Electronic  control circuit.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/Oscillator-Generator/ic-digital-555-pulse-generator/"&gt;Frost  Alarm or Cold Activated Switch by IC 741&lt;/a&gt;&lt;br /&gt;A simple thermistor triggered cold switch with adjustable threshold.  Notes:&lt;br /&gt;The thermistor used has a resistance of 15k at 25 degrees and 45k at 0  degrees ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/one-button-on-off-switch-by-4093-and-irfz44/"&gt;One  Button On Off Switch by 4093 and IRFZ44&lt;/a&gt;&lt;br /&gt;7 Feb 2008 ... The load is driven by the MOSFET IRFZ44 and 4093 AND  gates&lt;br /&gt;are used in the circuit. The output of the 4093 IC drives the MOSFET.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/simple-touch-switch-one-shot-by-4011/"&gt;Simple  Touch Switch One Shot by 4011&lt;/a&gt;&lt;br /&gt;17 Apr 2008 ... Here is a simple touch control switch, I use IC 4011.  Logic HI&lt;br /&gt;at output is timer pulse delay control by C1 1S = C1 4.7uF(micro farad),  ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/IC-555/voltage-controlled-switch-using-555-timer/"&gt;Voltage  Controlled Switch using 555 Timer&lt;/a&gt;&lt;br /&gt;IC 555 Circuit, Voltage Controlled Switch using 555 Timer. ...&lt;br /&gt;In this circuit the 555 timer is used in a novel way, as a voltage  controlled switch. ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/capacitive-sensortouch-switch-relay-with-bc337/"&gt;Capacitive  Sensor(Touch switch relay) with BC337&lt;/a&gt;&lt;br /&gt;14 Sep 2007 ... Special design for shop-windows animation Useful for  many&lt;br /&gt;types of touch controls Parts: R1,R2_____1M 1/4W Resistors R3,R4____47K  1/4W.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/current-limit-switch-is-digitally-programmable/"&gt;Current-Limit  Switch Is Digitally Programmable&lt;/a&gt;&lt;br /&gt;17 Dec 2007 ... Current-limit switches are virtually ubiquitous in  system controls.&lt;br /&gt;They provide a safe means for regulating the current delivered to a load  ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/pbs-switch-debouncing-by-555/"&gt;PBS  Switch Debouncing by 555&lt;/a&gt;&lt;br /&gt;17 Apr 2008 ... This circuit will remove the transient spikes and  contact bounces&lt;br /&gt;from a non-latching push button switch. Using a 555 timer as a  monostable ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/100-seconds-duration-on-switch-with-touch-control-by-555/"&gt;100  Seconds Duration On Switch with Touch Control by 555&lt;/a&gt;&lt;br /&gt;7 Feb 2008 ... This is a touch control switch which keeps the circuit on  about 100 seconds&lt;br /&gt;after touching the plate connected to the 2 numbered pin.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/standard-touch-switch-by-gate-of-ic-4011/"&gt;Standard  Touch Switch by Gate of IC 4011&lt;/a&gt;&lt;br /&gt;27 Apr 2008 ... This circuit uses a 4011 logic gate digital as the bases  of the touch switch.&lt;br /&gt;It are Standard and very easy because I used a Gate of IC 4011 ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/touch-switch-by-ic-4001-4020/"&gt;Touch  Switch By IC 4001 &amp;amp; 4020&lt;/a&gt;&lt;br /&gt;18 May 2007 ... Circuit Touch Switch By IC CD4001, CD4020 This be touch  switch&lt;br /&gt;be simple again the circuit. It use integrated digital circuit is  important ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/high-current-mosfet-toggle-switch-with-debounced-push-button/"&gt;High  Current MOSFET Toggle Switch with Debounced Push Button&lt;/a&gt;&lt;br /&gt;24 Apr 2007 ... This circuit was adapted from the Toggle Switch  Debounced Pushbutton&lt;br /&gt;by John Lundgren. It is particularly useful in controlling a load from  ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/autoformer-switch-mode-power-supply/"&gt;Autoformer  Switch-Mode Power Supply&lt;/a&gt;&lt;br /&gt;18 Feb 2008 ... This is a small 2*25 (actually, 2*50) WPC amplifier with  3-order&lt;br /&gt;crossover stage (configurable as LP or HP). Of particular interest is  the ...&lt;br /&gt;&lt;/span&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;&lt;a href="http://www.elecfree.com/electronic/cmos-4013-switch/"&gt;CMOS 4013  Switch&lt;/a&gt;&lt;br /&gt;30 Jul 2008 ... The voltage generated by a piezo transducer can activate  a digital circuit.&lt;br /&gt;One may build a simple demonstration switch from a piezo ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/switch-mode-power-converters-design-and-analysis/"&gt;Switch-Mode  Power Converters: Design and Analysis&lt;/a&gt;&lt;br /&gt;14 Nov 2007 ... This book introduces an innovative, highly analytical  approach to symbolic,&lt;br /&gt;closed-form solutions for switched-mode power converter circuits ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/touch-switch-using-digital-ic/"&gt;Touch  Switch using digital IC&lt;/a&gt;&lt;br /&gt;7 Dec 2008 ... If friends seek touch switch Circuit model to be simple.&lt;br /&gt;I begs for to advise this circuit, use integrated digital circuit number  IC 4011 ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/switch-mode-led-backlight-by-max1698/"&gt;Switch-Mode  LED Backlight by MAX1698&lt;/a&gt;&lt;br /&gt;22 Mar 2008 ... White-LED backlights are gaining acceptance because they&lt;br /&gt;offer higher reliability and simpler drive circuitry than those based on  CCFL and ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/12v-10a-dark-activated-switch-by-lm324/"&gt;12V  10A Dark Activated Switch by LM324&lt;/a&gt;&lt;br /&gt;3 Oct 2007 ... The circuit is a combination manual switch and automatic  dark-activated switch.&lt;br /&gt;It is designed to control up to 10 amps of 12V lights.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/555-timer-as-a-switch-mode-power-supply/"&gt;555  timer as a switch-mode power supply&lt;/a&gt;&lt;br /&gt;27 Dec 2007 ... Most switch-mode power supplies rely on a PWM&lt;br /&gt;(pulse-width-modulated) output that is controlled via voltage feedback.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/temperature-window-switch-by-ic-741/"&gt;Temperature  Window switch by IC 741&lt;/a&gt;&lt;br /&gt;16 Oct 2007 ... This circuit, is basically a resistance sensing window  switch,&lt;br /&gt;except that the resistor takes the form of an NTC thermistor and ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/IC-555/bounceless-switch-by-ic-555/"&gt;Bounceless  Switch by IC 555&lt;/a&gt;&lt;br /&gt;Bounceless Switch by IC 555. ... This is circuit Bounceless Switch , Use  IC 555 Timer for Easy&lt;br /&gt;Timer circuit. Output pin 3 pluse 0.1s. Control by push S1. ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/opto-thermo-control-relay-switch-with-ic-741/"&gt;Opto-Thermo  Control Relay Switch with IC 741&lt;/a&gt;&lt;br /&gt;18 May 2007 ... Circuit Opto-Thermo Control Relay Switch with IC 741&lt;br /&gt;This be Electronic switch circuit is onely. Which work with the light  and the ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/light-relay-switch-by-bc547-bc337-2/"&gt;Light  Relay Switch By BC547 &amp;amp; BC337&lt;/a&gt;&lt;br /&gt;This Circuit is easy, Light Relay Switch By BC547 &amp;amp; BC337. Circuit  Light Relay Switch&lt;br /&gt;By BC547 &amp;amp; BC337 PCB Light Relay.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/fairchild-power-switch-2/"&gt;Fairchild  Power Switch&lt;/a&gt;&lt;br /&gt;18 Mar 2008 ... The PWM controller features integrated oscillator to be  synchronized&lt;br /&gt;with the external sync signal, under voltage lockout, optimized gate ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/circuit-light/light-sensitive-switch-with-ldr-2n2926/"&gt;Circuit  Lighting : Light Sensitive Switch with LDR + 2N2926&lt;/a&gt;&lt;br /&gt;Circuit Lighting , Light Sensitive Switch with LDR + 2N2926.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/electronic-control/ic-4049-bounceless-switch/"&gt;IC  4049 Bounceless Switch&lt;/a&gt;&lt;br /&gt;This is Bounceless Switch using IC 4049 , It is Electronic control  circuit.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/555-ic-timer-control-relay-switch/"&gt;555  IC Timer control relay Switch&lt;/a&gt;&lt;br /&gt;18 May 2007 ... Click to View Circuit 555 IC Timer control relay Switch  This the circuit sets&lt;br /&gt;the time to are simple one that interesting , because use IC ...&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5715502922698599918?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5715502922698599918/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/switch-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5715502922698599918'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5715502922698599918'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/switch-circuit.html' title='Switch circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5621235074915061910</id><published>2010-04-15T21:12:00.000-07:00</published><updated>2011-03-11T16:20:32.146-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Ultrasonic circuit'/><title type='text'>Ultrasonic circuit</title><content type='html'>&lt;span style=";font-family:Arial,Helvetica,sans-serif;font-size:130%;"  &gt;&lt;a href="http://www.elecfree.com/electronic/ultrasonic-range-meter-by-pic16f873/"&gt;Ultrasonic  Range Meter by PIC16F873&lt;/a&gt;&lt;br /&gt;8 Jan 2008 ... This circuit is measuring the range to an object by using  ultrasonic&lt;br /&gt;transmitter and ultrasonic receiver. The distance is calculated by PIC  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/ultrasonic-pest-repellent-by-cd4013/"&gt;Ultrasonic  Pest Repellent by CD4013&lt;/a&gt;&lt;br /&gt;27 Oct 2008 ... It is well know that pests like rats, mice etc are  repelled by ultrasonic&lt;br /&gt;frequency in the range of 30 kHz to 50 kHz.&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/ultrasonic-parking-sonar-by-4017/"&gt;Ultrasonic  Parking Sonar by 4017&lt;/a&gt;&lt;br /&gt;6 Feb 2008 ... It works on the sonar principle, sending an ultrasound  burst and listening for&lt;br /&gt;first echo. The burst generated by the oscillator built ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/ultrasonic-parking-sonar-by-40106/"&gt;Ultrasonic  Parking Sonar by 40106&lt;/a&gt;&lt;br /&gt;5 Oct 2007 ... Feautures: * automatic switch on on rear gear *  led-bargraph display&lt;br /&gt;* audible bleep on last led * good old design style, no.&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5621235074915061910?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5621235074915061910/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/ultrasonic-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5621235074915061910'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5621235074915061910'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/ultrasonic-circuit.html' title='Ultrasonic circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-334510448879030005</id><published>2010-04-13T23:41:00.000-07:00</published><updated>2011-03-11T16:20:32.162-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='timer'/><title type='text'>Timer circuit</title><content type='html'>&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;This is timer  circuit, , which compose the circuit controls, delay the work.&lt;br /&gt;When expire warn or use control other get. The majority is will the  circuit is simple,&lt;br /&gt;then build not difficult.  For example NE555 integrated circuit leads  come to are usable,&lt;br /&gt;The circuit delays with the transistor and other again many the circuit.&lt;br /&gt;&lt;br /&gt;         &lt;a href="http://www.elecfree.com/circuit/IC-555/555-asymmetric-timer/"&gt;555  Asymmetric Timer&lt;/a&gt;&lt;br /&gt;A simple astable timer made with the 555, the mark (on) and space (off)&lt;br /&gt;values may be set independently. The timing chain consists of resistors  Ra, ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/IC-555/555-timer-5-to-30-minute/"&gt;555  Timer 5 to 30 Minute&lt;/a&gt;&lt;br /&gt;However you must use the CMOS type 555 timer designated the 7555,&lt;br /&gt;a normal 555 timer will not work here due to the resistor values. ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/IC-555/timer-plus-relay-by-ic-555/"&gt;Timer  Plus Relay by IC 555&lt;/a&gt;&lt;br /&gt;Timer Plus Relay by IC 555. ... Use IC 555 Timer (HOT IC) and Relay 6V ,&lt;br /&gt;Volt supply 9V. R1 and C1 control timer relay 11 S. Trigger circuit pin 2  to switch ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/IC-555/voltage-controlled-switch-using-555-timer/"&gt;Voltage  Controlled Switch using 555 Timer&lt;/a&gt;&lt;br /&gt;IC 555 Circuit, Voltage Controlled Switch using 555 Timer. ... In this  circuit the 555 timer&lt;br /&gt;is used in a novel way, as a voltage controlled switch. ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/car-burglar-alarm-timer-delay-using-ne556/"&gt;Car  Burglar Alarm timer delay using NE556&lt;/a&gt;&lt;br /&gt;12 Jan 2009 ... Car Burglar Alarm timer alarm system circuit , model to  economize.&lt;br /&gt;This circuit convenients for to set up in an automobile. usually switch  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/digital-circuit/one-shot-timer-by-ic-555/"&gt;One  - Shot Timer by IC 555&lt;/a&gt;&lt;br /&gt;This is digital circuit, It is One - Shot Timer make by IC 555. Power  supply 5-15V, Output pin 3,&lt;br /&gt;Input pin 2 Trigger input. One - Shot Timer by IC 555.&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/astable-timer-with-pic-12f629-12f675/"&gt;Astable  Timer with PIC 12F629 - 12F675 &lt;/a&gt;&lt;br /&gt;5 Jun 2009 ... This software functions as a long period astable  mutivibrator.&lt;br /&gt;The mark and space period can be set from 1 second up to a maximum 65535  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/pic16f628-digital-clock-timer/"&gt;PIC16F628  Digital Clock Timer&lt;/a&gt;&lt;br /&gt;1 Feb 2008 ... This clock timer uses a PIC16F628 microcontroller to  display 3 and 1/2 digit&lt;br /&gt;time and control an external load. It can be programmed to time ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/basic-timer-by-ic-quad-timer-lm558/"&gt;Basic  Timer By IC Quad Timer LM558&lt;/a&gt;&lt;br /&gt;23 Jul 2007 ... Basic Timer By IC Quad Timer 558 Today I begs for to  advise&lt;br /&gt;the circuit timer the foundation. By use the integrated circuit number  LM558 (IC ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/rs-flip-flop-made-with-a-lm556-timer/"&gt;RS  - Flip-Flop Made With A LM556 Timer&lt;/a&gt;&lt;br /&gt;5 Sep 2009 ... The circuit on this page is for a hybrid - SET / RESET  type of&lt;br /&gt;logic Flip-Flop that is constructed from an LM556 - Dual Timer  integrated ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/power-saver-timer-kit/"&gt;Power  Saver &amp;amp; Timer Kit&lt;/a&gt;&lt;br /&gt;12 Sep 2009 ... This little timer kit can be easily added to any  existing project&lt;br /&gt;to allow for automatic shutoff. Tons of applications; heating, cooling,  ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/d-flip-flop-made-with-a-lm556-timer/"&gt;D  - Flip-Flop Made With A LM556 Timer&lt;/a&gt;&lt;br /&gt;23 Aug 2009 ... This circuit is a hybrid - D type Flip-Flop that is  constructed from an LM556 -&lt;br /&gt;Dual Timer integrated circuit. The circuit is essentially a ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/one-shot-by-ic-quad-timer-558/"&gt;One-Shot  By IC Quad Timer 558 &lt;/a&gt;&lt;br /&gt;23 Jul 2007 ... One-Shot By IC Quad Timer LM558 When mention the circuit  One Shot friends&lt;br /&gt;at take an interest digital side may know good that how much is it ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/zn1034e-timer-circuit/"&gt;ZN1034E  Timer&lt;/a&gt;&lt;br /&gt;This entry was posted on Sunday, May 20th, 2007 at 3:23 pm and is filed  under Audio - Alarm,&lt;br /&gt;Circuit, Timer. You can follow any responses to this entry ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/relay-timer-switch-by-ic-555-and-741/"&gt;Relay  Timer switch By IC 555 and 741&lt;/a&gt;&lt;br /&gt;29 Aug 2007 ... In Fig.1 see a 100 second delayed turn ON relay RL1  switch, if plug power +12V&lt;br /&gt;in circuit. In Fig.2 see a two range 6-60 second and 1-10 ...&lt;br /&gt;&lt;br /&gt;&lt;/span&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;&lt;br /&gt;         &lt;a href="http://www.elecfree.com/electronic/basic-555-timer-oscillator/"&gt;Basic  555 Timer Oscillator&lt;/a&gt;&lt;br /&gt;26 Apr 2008 ... The circuit on the left shows the standard astable  oscillator circuit for&lt;br /&gt;the NE555N IC. This si the basic circuit that is shown in most ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/555-timer-as-a-switch-mode-power-supply/"&gt;555  timer as a switch-mode power supply &lt;/a&gt;&lt;br /&gt;27 Dec 2007 ... Most switch-mode power supplies rely on a PWM  (pulse-width-modulated)&lt;br /&gt;output that is controlled via voltage feedback. A 555-timer IC can ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/basic-timer-control-with-ne555/"&gt;Basic  Timer Control with NE555&lt;/a&gt;&lt;br /&gt;13 Aug 2008 ... As friends many take an interest the circuit about IC  555 which&lt;br /&gt;be integrated highly popular that circuit. I then lead the circuit sets  the ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/circuit-egg-timer-by-555/"&gt;Circuit  Egg Timer By LM555&lt;/a&gt;&lt;br /&gt;22 May 2007 ... Click to View Circuit Egg Timer By 555 This is Easy and  Mini Timer Circuit&lt;br /&gt;( Egg Timer) by IC 555. Alarm by Buzzer. This be mini timer ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/simple-timer-with-ic-4093-7808/"&gt;simple  timer with IC 4093 + 7808&lt;/a&gt;&lt;br /&gt;31 Aug 2007 ... The on time of the timer is set by the one shot built  with R2/R3 C3 and IC2A:&lt;br /&gt;after pressing pushbutton S1 C3 will be charged slowly through ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/IC-555/circuit-egg-timer-by-555/"&gt;Circuit  Egg Timer By 555&lt;/a&gt;&lt;br /&gt;IC 555 Circuit, Circuit Egg Timer By 555. ... This is Easy and Mini  Timer Circuit&lt;br /&gt;( Egg Timer) by IC 555. Alarm by Buzzer. Circuit Egg Timer by LM555 ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/lm555-timer-used-as-a-voltage-comparator-or-schmitt-trigger/"&gt;LM555  Timer Used As A Voltage Comparator Or Schmitt Trigger&lt;/a&gt;&lt;br /&gt;22 Oct 2009 ... The next section shows how the LM555 timer could be used  as&lt;br /&gt;a voltage comparator or a wide offset Scmitt Trigger. Applications for  which it ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/555-timer-pulse-generator/"&gt;555  timer pulse generator &lt;/a&gt;&lt;br /&gt;31 Jan 2008 ... To drive ignition coils is to use a 555 timer pulse  generator.&lt;br /&gt;A 555 generates a square wave output that triggers the 2N3055.&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/basic-timer-using-fet-2n3819/"&gt;Basic  Timer using FET 2N3819 &lt;/a&gt;&lt;br /&gt;8 Sep 2008 ... This circuit be Basic Timer Circuit by use important  equipment is FET 2N3819.&lt;br /&gt;By this circuit can can delay long ago arrive at 1.5 minute.&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/timer-circuit-by-fet-transister/"&gt;Timer  Circuit by FET + Transister&lt;/a&gt;&lt;br /&gt;20 May 2007 ... Circuit Timer Circuit by FET + Transister. ... ZN1034E  Timer&lt;br /&gt;LED Chaser by IC 4017 + IC 555 ». Timer Circuit by FET + Transister ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/tan-timer-by-ic-4060-and-ic-4017/"&gt;Tan  Timer by IC 4060 and IC 4017&lt;/a&gt;&lt;br /&gt;26 Oct 2008 ... Six timing positions suited to different skin types  Timing affected&lt;br /&gt;by sunlight intensity Six timing positions suited to different skin ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/touch-switch-low-cost-by-timer-ic-555/"&gt;Touch  Switch low cost by Timer IC 555 &lt;/a&gt;&lt;br /&gt;15 Oct 2008 ... This Touch Switch circuit use a part compares with  voltage 2 group,&lt;br /&gt;within the integrated circuit timer LM555 or NE555.&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/timer-plus-relay-by-ic-555/"&gt;Timer  Plus Relay by IC 555&lt;/a&gt;&lt;br /&gt;29 Jun 2007 ... This be Timer Plus Relay Circuit by IC 555. When see the  circuit also&lt;br /&gt;a little equipment. By the value R1 and C1 perform set the time give ...&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/fully-adjustable-pulse-generator-by-ic-quad-timer-558/"&gt;Fully  Adjustable Pulse Generator By IC Quad Timer 558&lt;/a&gt;&lt;br /&gt;29 Jul 2007 ... Fully Adjustable Pulse Generator By IC Quad Timer LM558  Be the circuit&lt;br /&gt;that is valuable very , because frequency pulse fine get freely do ...&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-334510448879030005?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/334510448879030005/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/timer-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/334510448879030005'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/334510448879030005'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/timer-circuit.html' title='Timer circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-772967266485505724</id><published>2010-04-12T19:22:00.000-07:00</published><updated>2011-03-11T16:20:32.181-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='motor control'/><title type='text'>stepper motor circuit</title><content type='html'>&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:85%;"&gt;&lt;br /&gt;    &lt;a href="http://www.elecfree.com/electronic/stepper-motor-controller-by-pic16f84/"&gt;Stepper  Motor controller by PIC16F84&lt;/a&gt;&lt;br /&gt;9 Jan 2008 ... On these pages, I will introduce a control circuit for  stepper motor.&lt;br /&gt;The software of this project is adapted to Embedded Systems(Lab13) for  ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/circuit/motor-control/stepper-motor-driver-using-l298-and-l297/"&gt;Stepper  Motor Driver using L298 and L297&lt;/a&gt;&lt;br /&gt;This Step motor controller uses the L297 and L298N driver combination;&lt;br /&gt;it can be used as stand alone or controlled by microcontroller.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/basic-stepper-motor-driver-by-74194/"&gt;Basic  Stepper Motor Driver by 74194&lt;/a&gt;&lt;br /&gt;19 Mar 2008 ... The following diagram is for the main circuit of the  motor driver.&lt;br /&gt;A testing version is shown later on this page.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/stepper-motor-driver-by-74194/"&gt;Stepper  Motor Driver by 74194&lt;/a&gt;&lt;br /&gt;2 Feb 2008 ... Probably the simplest, reversible drive circuit is the  H-Bridge.&lt;br /&gt;Some BEAMbots use H-bridge motor drivers; many more use an H-bridge  variant ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/74ls194-74ls04-drive-a-stepper-motor/"&gt;74LS194,  74LS04 drive a stepper motor &lt;/a&gt;&lt;br /&gt;19 Sep 2007 ... There are so many ways to drive a stepper motor, Here is  another circuit that use&lt;br /&gt;74LS194 4 bit bi-directional universal shift register as a ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/4013-and-irf510-easy-drive-a-stepper-motor/"&gt;4013  and IRF510 Easy drive a stepper motor&lt;/a&gt;&lt;br /&gt;19 Sep 2007 ... Here is easy circuit drive a stepper motor with pulse  input.&lt;br /&gt;Use IC 4013 (IC Cmos) and Mosfet IRF510 drive Motor Stepper.&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/driving-bipolar-stepper-motors-by-pic16f84/"&gt;Driving  Bipolar Stepper Motors by PIC16F84&lt;/a&gt;&lt;br /&gt;4 Feb 2008 ... Stepper motors are devices, which convert electrical  impulses into discrete&lt;br /&gt;mechanical rotational movements. In a typical stepper motor, ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/stepper-motor-driver-by-sn74194/"&gt;Stepper  Motor Driver by SN74194&lt;/a&gt;&lt;br /&gt;9 Nov 2007 ... This page features an inexpensive stepper motor driver  that could be used&lt;br /&gt;to power slow speed projects on the layout or other hobby ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/simple-stepper-motor-controller-by-4027-4070/"&gt;Simple  Stepper Motor Controller by 4027 , 4070&lt;/a&gt;&lt;br /&gt;5 Oct 2007 ... Click to View Circuit and Read More I found this circuit  in my files.&lt;br /&gt;I don't know where it came from, but it looks like I photocopied it ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/uln2003-control-stepper-motor-by-parallel-port/"&gt;ULN2003  Control Stepper Motor by Parallel Port&lt;/a&gt;&lt;br /&gt;15 May 2008 ... This is an easy to build stepper motor driver that will  allow you to precisely&lt;br /&gt;control a unipolar stepper motor through your computer's ...&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/stepper-motor-driver-kit/"&gt;Stepper  Motor Driver Kit&lt;/a&gt;&lt;br /&gt;28 Jul 2009 ... The motors are top quality, but how the heck do you  drive them without&lt;br /&gt;shelling out a fortune? Lightweight, with Ramsey Super Stepper!&lt;br /&gt;&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-772967266485505724?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/772967266485505724/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/stepper-motor-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/772967266485505724'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/772967266485505724'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/04/stepper-motor-circuit.html' title='stepper motor circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-4399793127714556534</id><published>2010-03-21T08:55:00.000-07:00</published><updated>2011-03-11T16:20:32.204-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='circuit ic'/><title type='text'>วงจร IC-TL494</title><content type='html'>รวมวงจรที่ใช้ไอซี เบอร์ TL494 (tl494 circuits) ไอซีเบอร์นี้ ทำหน้าที่เป็น Pulse-width Modulation Control Circuits เหมาะสำหรับควบคุมความเร็วมอเตอร์ หรือวงจรจ่ายไฟสวิชชิ่ง เพราะใช้เทคนิค PWM ซึ่งนิยมใช้กันมาก&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/electronic-control/pwm-control-speed-motor-12v-by-tl494/"&gt;PWM Control Speed Motor 12V By TL494&lt;/a&gt;  วงจรควบคุมความเร็วมอเตอร์แบบ PWM&lt;br /&gt;&lt;a title="Permanent Link: INVERTER 4W by TL494" href="http://www.elecfree.com/electronic/inverter-4w-by-tl494/"&gt;INVERTER 4W by TL494&lt;/a&gt; วงจรอินเวอร์วเตอร์ขนาดเล็ก ด้วยไอซีเบอร์ TL494&lt;br /&gt;&lt;a href="http://www.elecfree.com/circuit/power-supply/power-supply-atx-pc-200w/"&gt;POWER SUPPLY ATX PC 200W &lt;/a&gt;วงจรจ่ายไฟของเครื่องเพาเวอร์ซัพพลายคอมพิวเตอร์รุ่นเก่า&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/circuit-power-supply-computer-230w-220v/"&gt;computer power supply 230W 220V&lt;/a&gt;  PC เพาเวอร์ซัพพลาย ขนาด 230Watt&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/circuit-power-supply-regulator-switching-0-50v-5a-by-tl494-mj15004/"&gt;power supply regulator switching 0-50V 5A by TL494 , MJ15004&lt;/a&gt;  วงจรจ่ายไฟสวิตชิ่งซัพพลายปรับค่าได้ 0-50V 5A&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/autoformer-switch-mode-power-supply-by-tl494/"&gt;Autoformer Switch-Mode Power Supply by TL494&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/200w-pc-power-supply-switching-110v-220v/"&gt;200W PC power supply switching 110V-220V&lt;/a&gt; Computer power supply switching regulated&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/old-power-supply-computer-by-tl494/"&gt;Old power supply computer by TL494&lt;/a&gt;วงจรจ่ายไฟคอมพิวเตอร์เก่าๆ ใช้ไอซี TL494 เป็นอุปกรณ์สำคัญ&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-4399793127714556534?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/4399793127714556534/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/03/ic-tl494.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4399793127714556534'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4399793127714556534'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/03/ic-tl494.html' title='วงจร IC-TL494'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-2719833004118343609</id><published>2010-02-22T08:11:00.000-08:00</published><updated>2011-03-11T16:20:32.219-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Digital circuit'/><title type='text'>Digital circuit</title><content type='html'>รวมวงจรดิจิตอลต่างๆ โดยเน้นเป็นลักษณะ Simple digital circuit ที่ง่ายๆ ไว้หลายวงจร เช่น ดิจิตอลลอจิก, กำเนิดสัญญาณ, งานควบคุม,ตั้งเวลา,วงจรนับ,วงจรหารความถี่และอื่นๆ &lt;br /&gt;เช่น&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/monostable-multivibrator-by-4538/" title="Monostable Multivibrator by 4538"&gt;&lt;img src="http://www.elecfree.com/electronic/wp-content/uploads/2008/03/monostable-multivibrator-by-4538.thumbnail.jpg" alt="Monostable Multivibrator by 4538" /&gt;&lt;/a&gt;&lt;br /&gt;นี่เป็นวงจรโมโนสเตเบิล มัลติไวเบรแตอร์ หรือวงจรวันชอต อีกวงจรที่น่าสนใจ ภายในไอซีเบอร์ CD4538 ประกอบด้วย 2 ตัว ทำงานอิสระดี สามารถกำหนดการหน่วงเวลาได้ RC รายละเอียดเพิ่มเติมในวงจร&lt;br /&gt;&lt;br /&gt;สามารถดูวงจรอื่นๆ ได้ &lt;a href="http://www.eanic.com/digital-circuit/"&gt;&lt;span style="font-weight: bold;"&gt;digital circuit&lt;/span&gt;&lt;/a&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-2719833004118343609?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/2719833004118343609/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/digital-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2719833004118343609'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2719833004118343609'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/digital-circuit.html' title='Digital circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-7050101758026803616</id><published>2010-02-17T06:23:00.000-08:00</published><updated>2011-03-11T16:20:32.234-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='electronic circuit'/><title type='text'>Electronic circuits มากมาย</title><content type='html'>&lt;span style="font-weight: bold;"&gt;รวมวงจรอิเล็กทรอนิกส์ต่างๆ มากมาย โดยเน้นที่ไดอะแกรมง่ายๆ และได้นับความนิยมสูง เพียง 25 ประเภท ประมาณ 1,000 schematic &lt;/span&gt;&lt;br /&gt;&lt;span style=";font-family:Arial,Helvetica,sans-serif;font-size:100%;"  &gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=118"&gt;วงจรอินเวอร์เตอร์&lt;/a&gt;   power inverter แปลงไฟแบตเตอรี่ เป็นไฟบ้าน AC 220V ใช้งานได้สบาย&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=126"&gt;วงจรควบคุมมอเตอร์&lt;/a&gt;   Control DC Motor, Stepper motor,sevo motor มีหลายวงจร&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=108"&gt;เกี่ยวกับ IC 555  วงจรชุด 1&lt;/a&gt;  วงจรขยายเสียงโอทีแอล เสียงดีไม่แพ้ใคร (มีแผ่นปรินต์ด้วย)&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=102"&gt;รวมวงจรขยายเสียง&lt;/a&gt;   home amplifier,high power amp, mosfet amp, transistor amplifier&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=112"&gt;วงจรควบคุมต่างๆ&lt;/a&gt;   Control Electronic Circuit, Switch timer,touch Switch,power control&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=119"&gt;วงจรขยายเสียงรถยนต์&lt;/a&gt;   Audio Car Amplifier, แอมป์รถยนต์ มากมายหลายวงจร&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=105"&gt;วงจรจ่ายไฟเร็กกูเลเตอร์&lt;/a&gt;    Switching Power supply Circuit, DC Voltage Regulator Circuit&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=109"&gt;เกี่ยวกับ  หลอดไฟแสงสว่าง&lt;/a&gt;  วงจร LED Lamp , LED display, Light Flashing&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=26"&gt;วงจรทีวี และ  วงจรมอนิเตอร์&lt;/a&gt;  Circuit TV, Monitor Circuit&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=121"&gt;วิทยุรับส่ง&lt;/a&gt;   FM  transmitter, เครื่องรับ FM , เครื่องส่ง FM (เอฟเอ็ม), วงจรส่งสัญญาณทีวี&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=105"&gt;เกี่ยวกับแบตเตอรี่ค่ะ&lt;/a&gt;    Battery Circuit,lithium battery,battery charger,cell battery&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=131"&gt;วงจร ดีซี ทู ดีซี  คอนเวอร์เตอร์&lt;/a&gt;   DC to DC Converter Circuit, Step up Voltage&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=125"&gt;รวมวงจรจ่ายไฟแบบสวิตชิ่ง&lt;/a&gt;  Switching power supply, Power supply Switching mode regulater&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=127"&gt;วงจรแอมป์มอสเฟต  (Mosfet Amp)&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=130"&gt;วงจรจ่ายไฟตรงค่าคงที่&lt;/a&gt;  แหล่งจ่ายไฟ คงที่ Fix dc power supply Voltage&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=171"&gt;electronic test  equipment&lt;/a&gt; วงจรเครื่องมือวัด ทดสอบอิเล็กทรอนิกส์ speed test&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=116"&gt;วงจรดิจิตอล&lt;/a&gt;  Digital circuit, Oscilator, Counter, วงจรนับ,วงจรหารความถี่,  วงจรผลิตสัญญาณนาฬิกา&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=175"&gt;เครื่องกันขโมย&lt;/a&gt;กันขโมย,home  alarm system,home security alarm&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=129"&gt;วงจรจ่ายไฟกระแสสูงๆ&lt;/a&gt;  High power current supply, 10A up&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=79"&gt;รวมวงจรมือถือ&lt;/a&gt;  Mobile Phone Circuit, Nokia, sony&lt;br /&gt;&lt;a href="http://www.eanic.com/articles.php?cat_id=16"&gt;บทความ:  ไมโครคอนโทรลเลอร์&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=120"&gt;วงจรตรวจวัด ทดสอบ  (เช็ก speed test)&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=174"&gt;วงจร LED  Display&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.eanic.com/articles.php?cat_id=1"&gt;บทความ:  โครงงานจิ๋ว+แจ๋ว&lt;/a&gt;&lt;br /&gt;&lt;a href="http://www.eanic.com/pcb-power-supply/"&gt;pcb  power supply&lt;/a&gt;&lt;br /&gt;&lt;hr /&gt; &lt;a href="http://www.eanic.com/blog/tag/switching-power-supply/"&gt;Switching Power  Supply&lt;/a&gt; เครื่องสวิตชิ่งซัพพลายต่างๆ :: &lt;a href="http://www.blogger.com/www.eanic.com/blog/tag/power-supply-circuit/"&gt;&lt;b&gt;Power supply  circuit&lt;/b&gt;&lt;/a&gt;วงจรแหล่งเพาเวอร์ซัพพลาย&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/high-voltage-power-supply-small-circuit/"&gt;High  Voltage power supply Small Circuit&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/tag/dc-power-supply/"&gt;&lt;b&gt;DC Power  Supply&lt;/b&gt;&lt;/a&gt; :: &lt;a href="http://www.eanic.com/readarticle.php?article_id=174"&gt;&lt;b&gt;LED  Display&lt;/b&gt;&lt;/a&gt; วงจร LED แสดงผลได้ดี&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/tag/power-supply-circuit/"&gt;Power Supply  Circuit&lt;/a&gt; วงจรจ่ายไฟอีกแบบ :: &lt;a href="http://www.eanic.com/blog/tag/tone-control-circuit/"&gt;tone control  circuit&lt;/a&gt;โทนคอนโทรลเซอร์กิต&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/tag/pwm-motor-control/"&gt;Pwm Motor Control&lt;/a&gt;  ควบคุมความเร็วมอเตอร์ด้วย PWM :: &lt;a href="http://www.eanic.com/blog/tag/step-motor/"&gt;Step Motor Control&lt;/a&gt;  วงจรควบคุมสเต็บเปอร์มอเตอร์&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/tag/burglar-alarm-circuit/"&gt;Burglar Alarm  Circuit&lt;/a&gt; วงจรกันขโมยอีกวงจร :: &lt;a href="http://www.eanic.com/blog/tag/%E0%B9%80%E0%B8%8B%E0%B8%AD%E0%B8%A3%E0%B9%8C%E0%B9%82%E0%B8%A7%E0%B8%A1%E0%B8%AD%E0%B9%80%E0%B8%95%E0%B8%AD%E0%B8%A3%E0%B9%8C/"&gt;เซอร์โวมอเตอร์&lt;/a&gt;  วงจรเซอร์โวมอเตอร์คอนโทรล&lt;br /&gt;&lt;a href="http://www.eanic.com/readarticle.php?article_id=171"&gt;Electronic Test  Equipment&lt;/a&gt; วงจรเครื่องมือวัดอีกแบบ :: &lt;a href="http://www.eanic.com/blog/tag/home-alarm-system/"&gt;Home alarm system&lt;/a&gt;  วงจรระบบกันขโมยในบ้าน&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/tag/ac-dimmer/"&gt;Dimmer circuit&lt;/a&gt;  วงจรหรี่ไฟอิเล็กทรอนิกส์ :: &lt;a href="http://www.eanic.com/blog/tag/fm-transmitter/"&gt;FM Transmitter&lt;/a&gt;  วงจรเอ็ฟเอ็มทรานสมิสเตอร์&lt;br /&gt;&lt;a href="http://www.eanic.com/blog/tag/rf-amplifier/"&gt;RF Amplifier&lt;/a&gt; วงจรอาร์เอฟ  แอมปลิฟลาย :: &lt;a href="http://www.eanic.com/blog/tag/dc-converter-step-up-volt/"&gt;dc converter  step up volt&lt;/a&gt; วงจรดีซีคอนเวอร์เตอร์สเต็บอับโวลเต็จ&lt;br /&gt;&lt;hr /&gt; &lt;a href="http://www.eanic.com/blog/tag/voltage-regulator-ic/"&gt;Voltage Regulator  IC&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/tag/voltage-regulator-zener/"&gt;voltage regulator  zener&lt;/a&gt; :: lm317 voltage regulator  &lt;hr /&gt; &lt;a href="http://www.eanic.com/blog/dc-power-supply-regulator-38-volt-by-2n3055/"&gt;DC  Power supply regulator 38 Volt by 2N3055&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/mosfet-stabilized-power-supply-for-tube-amp/"&gt;Mosfet  stabilized power supply for Tube Amp&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/switching-power-supply-12v-10a-by-mj2955/"&gt;12v  power supply&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/7805-mj2955-power-supply-5v-5a-for-digital/"&gt;7805+Mj2955  power supply circuit 5V 5A for digital&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/power-supply-5v-2a-easy-circuit/"&gt;5V power  supply&lt;/a&gt; :: &lt;a href="http://www.eanic.com/blog/voltage-variable-power-supply-0-12v-07a-max-2a/"&gt;12v  2a power supply&lt;/a&gt; &lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-7050101758026803616?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/7050101758026803616/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/electronic-circuits.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7050101758026803616'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7050101758026803616'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/electronic-circuits.html' title='Electronic circuits มากมาย'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5764782524528903631</id><published>2010-02-15T06:46:00.000-08:00</published><updated>2011-03-11T16:20:32.253-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='transistor amplifier circuit'/><title type='text'>transistor amplifier circuit</title><content type='html'>รวมวงจรขยายเสียงที่ใช้ทรานซิสเตอร์เป็นอุปกรณ์สำคัญ มีจุดเด่นที่เสียงนุ่มนวล ฟังไพเราะ ไม่น่าเบื่อ&lt;br /&gt;&lt;br /&gt; ช่วยให้ผ่อนคลายดี และราคาประหยัด แต่อาจจะสร้างยากกว่าการใช้ไอซีนิดหน่อยครับ เพื่อความสะดวก&lt;br /&gt;&lt;br /&gt; ของท่าน ผมขอแนะนำวงจรแอมป์ทรานซิสเตอร์(transistor amplifier circuit)ที่น่าสนใจ ดังนี้&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/high-volt-mini-amplifier-with-ujt-transistor/"&gt;High volt mini Amplifier with UJT transistor&lt;/a&gt; วงจรแอมป์ทรานซิสเตอร์ UJT ที่ใช้ไฟเลี้ยงสูง ร้อยกว่าโวลต์ เป็นไอเดียหนึ่งที่น่าศึกษา&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/4-transistor-amplifier-for-small-speaker/"&gt;4-Transistor Amplifier for Small Speaker&lt;/a&gt; วงจรแอมป์ทรานซิสเตอร์ 4 ตัว ง่ายๆ เหมาะสำหรับทำแอมป์ในตู้ลำโพงขนาดเล็ก&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/bipolar-amplifier-hifi-ocl-100w-by-bd317-bd318/"&gt;Bipolar Amplifier HIFI OCL 100W by BD317-BD318&lt;/a&gt; วงจรแอมป์ทรานซิสเตอร์ไบโพล่าร์ ไฮไฟ โอซีแอล 100Watt เสียงดี เป็นอย่างไร ลองดูวงจรกันเลยครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/300watt-audio-amplifier-hifi-by-mj15003-mj15004-transistor/"&gt;300Watt audio amplifier HIFI by MJ15003-MJ15004 Transistor&lt;/a&gt; หากจะทำแอมป์ทรานซิสเตอร์ให้ออกงาน อวดชาวบ้านได้ก็ต้องชุดนี้เลย ด้วยกำลังขับเพียงพอ 300 วัตต์ งานปาร์ตี้เล็กๆ รับได้ไหวแน่นอน เสียงนุ่มนวลดี แต่ทุ้มแหลมชัดเจน ไม่รองใคร&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/easy-amplifier-hifi-ocl-150w-rms-by-transistor/"&gt;Easy Amplifier HiFi OCL 150W rms by Transistor&lt;/a&gt; นี่เป็นวงจรขยายเสียงกำลังขับ 150 watt rms เสียงดีอีกวงจรหนึ่งครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/120w-rms-power-amp-ocl-transistor-bipolar/"&gt;120W rms power amp OCL Transistor bipolar&lt;/a&gt; มาอีกแล้ว แอมป์ไบโพล่าร์ กำลังขับ 120 watt ดูแนวคิดวงจกันตามสบายครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/mje3055mje2955-power-amplifier-60-watt-into-8-ohms/"&gt;MJE3055+MJE2955 Power Amplifier 60 Watt Into 8 Ohms&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/mini-power-amplifier-30w-by-tip141-tip146/"&gt;Mini Power Amplifier 30W by TIP141 TIP146&lt;/a&gt;มือใหม่ หรือ ท่านที่ชอบฟังเพลงเบา คงชอบวงจรนี้ กำลังขับ 30W แต่เสียงดี ชัดเจน ใช้ทรานซิสเตอร์คู่ดาร์ลิงตัน เบอร์ TIP141 และ TIP146 ทนกำลังไฟฟ้าสูง ขยายกระแสได้เยี่ยมครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/50w-audio-power-amp-by-tip33-tip34/"&gt;50W Audio Power Amp by TIP33 TIP34&lt;/a&gt; สำหรับท่านอยากสร้างแอมป์ขนาดกลางๆ ประมาณ 50Watt ลองดูวงจรนี้ก็ดี จัดวงจรลักษณะง่ายๆ แต่เสียงน่าพอใจดี &lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/3w-5w-class-a-audio-amplifier-by-bd439/"&gt;3W - 5W Class-A Audio Amplifier by BD439&lt;/a&gt; ท่านที่อยากลองแอมป์ คลาส เอ ลองดูวงจรนี้ได้เลย แม้กำลังขับต่ำมากๆ  แต่ด้วยเป็นแอมป์คลาสเอ คงสนองความเสียงได้ดี เหมาะสำหรับศึกษาวงจรและสร้างเล่นง่ายๆ ครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/24-watt-class-a-amplifier-by-2n3055/"&gt;24 Watt Class A Amplifier by 2N3055&lt;/a&gt; นี่เป็นแอมป์คลาสเอ อีกวงจรที่สนใจ กำลังขับ 24Watt จึงเสียงดีไม่น้อย ใช้ทรานซิสเตอร์เบอร์ยอดนิยมตลอดกาลอีกด้วย เบอร์ 2N3055  เพราะสำหรับท่านที่อยากฟังเสียงไพเราะในห้องขนาดเล็กๆ ครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/10-14w-class-a-amplifier-by-tip3055/"&gt;10-14W Class A amplifier by TIP3055&lt;/a&gt; วงจรนี้เหมาะสำหรับมือใหม่อยากลองแอมป์ class A ง่ายๆ กำลังขับไม่สูงนักประมาณ 14Watt &lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/10-watt-rf-amplifier-for-18mhz-by-2sc1969/"&gt;10 watt RF amplifier for 18MHz by 2SC1969&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/30w-class-ab-amplifier-by-tip2955-tip3055/"&gt;30W Class AB amplifier by TIP2955 + TIP3055&lt;/a&gt; วงจรนี้เหมาะสำหรับสร้างไว้ฟังในห้องเล็กๆ หรือเป็นแอมป์เปิดฟังเพลิน เครื่องแรก ที่สร้างเอง ภูมิใจดีครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/power-amplifier-class-a-25w/"&gt;Power Amplifier Class A 25W&lt;/a&gt; วงจรแอมป์คลาส เอ ขนาด 25Watt อีกวงจร ที่น่าสนใจ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/3w-hi-fi-stereo-amplifier-by-2n1613/"&gt;3W HI-FI Stereo Amplifier by 2N1613&lt;/a&gt; วงจรแอมป์เล็กๆ อีกวงจรที่ออกแบบได้ดี เสียงใช้ได้เลยครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/100w-audio-amplifier-transistor-by-bdw84-bdw83/"&gt;100W Audio Amplifier Transistor by BDW84 , BDW83&lt;/a&gt; อีกวงจรแอมป์ 100 วัตต์ ที่น่าพลาด ดูแนวคิดวงจได้เลยครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/2-transistor-audio-amplifier-by-bc108/"&gt;2-TRANSISTOR AUDIO AMPLIFIER by BC108&lt;/a&gt; วงจรแอมป์ทรานซิสเตอร์จิ๋ว เหมาะสำหรับงานขยายเสียงเล็กๆ ที่ท่านอยากใช้ทรานซิสเตอร์ หรือ ใช้เพื่อการศึกษาก็ดีทีเดียวครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/power-amplifier-ocl-50w-by-bd250c-bd249c/"&gt;Power Amplifier OCL 50W by BD250C , BD249C&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/amplifier-class-ab-hi-fi-70w-by-mj15022-mj15023/"&gt;Amplifier Class AB Hi-Fi 70W by MJ15022 , MJ15023&lt;/a&gt; วงจรแอมป์ขนาด 70วัตต์ เสียงดี เพราะเป็นคลาส เอบี ทุ้มแหลมสะใจ วงจรออกแบบได้ดีพอสมควร ปัญหาเรื่องความเพี้ยนของเสียงน้อยด้วยครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/60w-bass-amplifier-by-mj11016/"&gt;60W Bass Amplifier by MJ11016&lt;/a&gt; นี่เป็นแอมป์เสียงทุ้มโดยเฉพาะ เพราะสำหรับสร้างไว้ขับลำโพงเสียง bass วงจรทรานซิสเตอร์ ก็เสียงไม่ใช่น้อย รองรับระบบเสียงโฮมเทียร์เตอร์ได้สบายครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/power-amplifier-ocl-60w-by-2n3055/"&gt;Power Amplifier OCL 60W by 2N3055 with PCB&lt;/a&gt; วงจรแอมป์ขนาด 60Watt จัดวงจรมาดี ใช้ทรานซิสเตอร์ยอดนิยม หมดปัญหาเรื่องหาอะไหล่ แน่นอนครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/power-amplifier-ocl-100w-with-mj802-mj4502/"&gt;Power Amplifier OCL 100w With MJ802, MJ4502&lt;/a&gt; วงจรนี้ เป็นลักษณะ โอซีแอล วงจรแม้ว่า จะเก่าแก่มากแล้ว แต่เสียงดี ทนทานใช้ได้ทีเดียว ควรมีวงจรป้องกันลำโพงไว้ด้วย ทุ้มแหลมไพเราะน่าฟังมากครับ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/circuit-power-amplifier-otl-50w-by-2n3055/"&gt;Circuit Power Amplifier OTL 50W by 2N3055&lt;/a&gt; วงจรแอมป์โอทีแอล 50Watt แม้ว่าเป็นวงจรเก่า แต่เสียงดีใช้ได้ทีเดียว มีดีเรื่องความดังไม่รองใคร และทนทานเป็นเยี่ยมครับ&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5764782524528903631?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5764782524528903631/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/transistor-amplifier-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5764782524528903631'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5764782524528903631'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/transistor-amplifier-circuit.html' title='transistor amplifier circuit'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-6380194709576118875</id><published>2010-02-15T03:22:00.000-08:00</published><updated>2011-03-11T16:20:32.272-08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='rf transmitter'/><category scheme='http://www.blogger.com/atom/ns#' term='วงจรวิทยุรับส่ง'/><category scheme='http://www.blogger.com/atom/ns#' term='rf receiver circuit'/><title type='text'>วงจรวิทยุรับส่ง rf circuits</title><content type='html'>รวมวงจรวิทยุรับส่ง ต่างๆ หลายวงจร &lt;br /&gt;rf circuits rf impedance matching rf amplifier circuit rf transmitter&lt;br /&gt;rf linear amplifier rf receiver circuit rf detector circuit&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to 500mW FM Transmitter by BC549" href="http://www.elecfree.com/electronic/500mw-fm-transmitter-by-bc549/"&gt;500mW FM Transmitter by BC549&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ขนาด 500mW ใช้ทรานซิสเตอร์ BC549&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to High Quality 200mW FM Transmitter by BF199" href="http://www.elecfree.com/electronic/high-quality-200mw-fm-transmitter-by-bf199/"&gt;High Quality 200mW FM Transmitter by BF199&lt;/a&gt; วงจรเครื่องส่งสัญญาณวิทยุ FM ขนาด 200mW คุณภาพสูง ด้วยทรานซิสเตอร์ BF199&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to 50-300mW FM Transmitter by BC549" href="http://www.elecfree.com/electronic/50-300mw-fm-transmitter-by-bc549/"&gt;50-300mW FM Transmitter by BC549&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ขนาด 50mW ถึง 300mW ด้วยทรานซิสเตอร์ เบอร์ BC549&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to 6 Transistor Super Regen Receiver by BC548" href="http://www.elecfree.com/electronic/6-transistor-super-regen-receiver-by-bc548/"&gt;6 Transistor Super Regen Receiver by BC548&lt;/a&gt; วงจรรับสัญญาณ Super Regen รุ่นทรานซิสเตอร์ BC548 จำนวน 6 ตัว&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to BH1417 Stereo PLL FM Transmitter" href="http://www.elecfree.com/electronic/bh1417-stereo-pll-fm-transmitter/"&gt;BH1417 Stereo PLL FM Transmitter&lt;/a&gt; วงจรส่งสัญาณ FM ระบบสเตอริโอ ด้วยไอซีเบอร์ BH1417&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;hr size="2" width="100%"&gt; &lt;a title="Permanent Link to BA1404 HI-FI Stereo FM Transmitter" href="http://www.elecfree.com/electronic/ba1404-hi-fi-stereo-fm-transmitter/"&gt;BA1404 HI-FI Stereo FM Transmitter&lt;/a&gt; วงจรส่งสัญญาณ FM ระบบสเตอริโอ ไฮไฟ ด้วยไอซี BA1404&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to Long range FM transmitter" href="http://www.elecfree.com/electronic/long-range-fm-transmitter/"&gt;Long range FM transmitter&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ระบบ Long range&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to Coil-less FM Transmitter by IC 40106" href="http://www.elecfree.com/electronic/coil-less-fm-transmitter-by-ic-40106/"&gt;Coil-less FM Transmitter by IC 40106&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ระบบ Coil-less ด้วยไอซีดิจิตอล 40106&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 40 Watt Amplifier For FM Broadcast by MRF171A" href="http://www.elecfree.com/electronic/40-watt-amplifier-for-fm-broadcast-by-mrf171a/"&gt;40 Watt Amplifier For FM Broadcast by MRF171A&lt;/a&gt; วงจรส่งสัญญาณระบบ FM กำลังขยายกำลัง 40W  ด้วย MRF171A&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to TV Signal Amplifier by BFR90, BFR91, BFW92" href="http://www.elecfree.com/electronic/tv-signal-amplifier-by-bfr90-bfr91-bfw92/"&gt;TV Signal Amplifier by BFR90, BFR91, BFW92&lt;/a&gt; วงจรขยายสัญญาณทีวี ด้วยทรานซิสเตอร์ BFR90,BFR91,BFW92&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to FM Amplifier 50Watt by BLY90" href="http://www.elecfree.com/electronic/fm-amplifier-50watt-by-bly90/"&gt;FM Amplifier 50Watt by BLY90&lt;/a&gt; วงจรขยายสัญญาณวิทยุ FM ขนาด 50W เบอร์ BLY90&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to FM Transmitter 4W by 2N3553" href="http://www.elecfree.com/electronic/fm-transmitter-4w-by-2n3553/"&gt;FM Transmitter 4W by 2N3553&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ขนาด 4W ด้วยทรานซิสเตอร์เบอร์ 2N3553&lt;br /&gt;&lt;br /&gt;....&lt;br /&gt;&lt;b&gt;ยังมีวงจรวิทยุรับส่งอื่นๆ อีกมากมาย ดูต่อในเว็บ www.eanic.com&lt;a href="http://www.eanic.com/readarticle.php?article_id=121"&gt; คลิ๊ก&lt;/a&gt;&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to FM Transmitter 3W by 2N3553" href="http://www.elecfree.com/electronic/fm-transmitter-3w-by-2n3553/"&gt;FM Transmitter 3W by 2N3553&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ขนาด 4W ด้วยทรานซิสเตอร์เบอร์ 2N3553&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to SW RF Pre-Amplifier with 2N3819" href="http://www.elecfree.com/electronic/sw-rf-pre-amplifier-with-2n3819/"&gt;SW RF Pre-Amplifier with 2N3819&lt;/a&gt; วงจรขยายสัญญาณวิทยุ SW  ด้วยทรานซิสเตอร์เบอร์ 2N3819&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to VHF Band 2 Radio Spectrum tuning" href="http://www.elecfree.com/electronic/vhf-band-2-radio-spectrum-tuning-approximately-with-2n3819/"&gt;VHF Band 2 Radio Spectrum tuning&lt;/a&gt; วงจร Spectrum tuning ย่าน VHF 2 Band&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to Automatic Retransmitting Makeshift Repeater" href="http://www.elecfree.com/electronic/automatic-retransmitting-makeshift-repeater-with-mosfet/"&gt;Automatic Retransmitting Makeshift Repeater&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 4 Watt FM Transmitter with 2N3553" href="http://www.elecfree.com/electronic/4-watt-fm-transmitter-with-2n3553/"&gt;4 Watt FM Transmitter with 2N3553&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ขนาด 4W ด้วยทรานซิสเตอร์ 2N3553&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 500W HF linear amplifier" href="http://www.elecfree.com/electronic/500w-hf-linear-amplifier/"&gt;500W HF linear amplifier&lt;/a&gt; วงจรขยายสัญญาณแบบ HF ลิเนียร์ ขนาด 500W&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to FM Transmitter with 2N2222" href="http://www.elecfree.com/electronic/fm-transmitter-with-2n2222/"&gt;FM Transmitter with 2N2222&lt;/a&gt; วงจรส่งสัญญาณวิทยุ FM ด้วยทรานซิสเตอร์ 2N2222&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 1.5 Volt Tracking FM Transmitter" href="http://www.elecfree.com/electronic/15-volt-tracking-fm-transmitter/"&gt;1.5 Volt Tracking FM Transmitter&lt;/a&gt; วงจส่งสัญญาณ FM Tracking ไฟเลี้ยง 1.5V&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to VHF Video Transmitter" href="http://www.elecfree.com/electronic/vhf-video-transmitter/"&gt;VHF Video Transmitter&lt;/a&gt; วงจรส่งสัญญาณวีดีโอ VHF แบบหนึ่ง&lt;br /&gt;&lt;br /&gt;  &lt;a href="http://www.elecfree.com/electronic/rf-power-amplifier-13w-to-6w-by-2sc1970/"&gt;RF Power Amplifier 1.3W to 6W by 2SC1970&lt;/a&gt; วงจรขยายสัญญาณวิทยุ กำลัง 1.3W ถึง 6W&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/an-am-rf-amp-for-internal-antennas/"&gt;An AM RF Amp for Internal Antennas&lt;/a&gt; เกี่ยวกับวิทยุเอเอ็ม&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/fm-transmitter-by-2n2222/"&gt;FM TRANSMITTER By 2N2222&lt;/a&gt; วงจรไมค์ลอยทรานซิสเตอร์ 3 ตัว ไฟเลี้ยง 3V เอง&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/2-frequency-oscillator-by-ic-tone-decoder-567/"&gt;2-Frequency Oscillator By IC Tone Decoder 567&lt;/a&gt; วงจรผลิตความถี่ 2 ความถี่ด้วยไอซี NE567&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 60 WATTS LINEAR AMPLIFIER with IRF840" href="http://www.elecfree.com/electronic/60-watts-linear-amplifier-with-irf840/"&gt;60 WATTS LINEAR AMPLIFIER with IRF840&lt;/a&gt; วงจรบูสเตอร์ ขยายสัญญาณวิทยุ ขนาด 60W ด้วยไอซี IRF840&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to AM portable radio receiver by ZN414 IC" href="http://www.elecfree.com/electronic/am-portable-radio-receiver-by-zn414-ic/"&gt;AM portable radio receiver by ZN414 IC&lt;/a&gt; วงจรรับเอเอ็มด้วยไอซี ZN414&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to Video to RF Modulator 189 MHZ" href="http://www.elecfree.com/electronic/video-to-rf-modulator-189-mhz/"&gt;Video to RF Modulator 189 MHZ&lt;/a&gt; วงจรแปลงสัญญาณภาพ Video เป็นสัญญาณวิทยุ ความถี่สูง 189MHZ&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to VHF Video Transmitter" href="http://www.elecfree.com/electronic/vhf-video-transmitter/"&gt;VHF Video Transmitter&lt;/a&gt; วงจรส่งสัญญาณวีดีโอ ทางสัญญาณวิทยุ ความถี่ VHF&lt;br /&gt;&lt;br /&gt;วงจรเกี่ยวกับขยายสายอากาศเอฟเอ็ม &lt;a href="http://www.elecfree.com/electronic/active-fm-antenna-amplifier-by-c2570/"&gt;Active FM Antenna Amplifier by C2570&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;a title="Permanent Link to 4 Watt FM Transmitter with 2N3553" href="http://www.elecfree.com/electronic/4-watt-fm-transmitter-with-2n3553/"&gt; 4 Watt FM Transmitter with 2N3553&lt;/a&gt; วงจรส่งวิทยุเอฟเอ็ม (ไมค์ลอย) 4W ด้วยทรานซิสเตอร์ 2N3553&lt;br /&gt;&lt;br /&gt; &lt;a title="Permanent Link to 500W HF linear amplifier" href="http://www.elecfree.com/electronic/500w-hf-linear-amplifier/"&gt;500W HF linear amplifier&lt;/a&gt; เกี่ยวกับวงจรขยายกำลังส่งสัญญาณวิทยุ 500W แบบลิเนียร์&lt;a title="Permanent Link to 500W HF linear amplifier" href="http://www.elecfree.com/electronic/500w-hf-linear-amplifier/"&gt;&lt;br /&gt;&lt;br /&gt;&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/fm-stereo-transmitter-with-ic-ba1404/"&gt;FM Stereo Transmitter with IC BA1404&lt;/a&gt; เครื่องส่งเอฟเอ็มเสตอริโอ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/linear-fm-30watt/"&gt;Linear FM 30Watt&lt;/a&gt; ชุดวงจรเกี่ยวกับส่งความถี่วิทยุ FM ขนาด 30W&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/easy-radio-wave-alarm/"&gt;Easy Radio Wave Alarm&lt;/a&gt; วงจรเตือนภัยด้วยสัญญาณวิทยุ&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/uhf-preamplifier-by-mpsh10-transistor/"&gt;UHF Preamplifier by MPSH10 transistor&lt;/a&gt; ขยายสัญญาณความถี่ย่าน UHF&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/tv-transmitter/"&gt;TV Transmitter   &lt;/a&gt;เครื่องส่งสัญญาณทีวีง่ายๆ น่าสนใจดีจ๊ะ&lt;span style="font-size:85%;"&gt;&lt;span style="font-size:85%;"&gt;&lt;br /&gt;&lt;br /&gt; &lt;a href="http://www.elecfree.com/electronic/fm-transmitter-with-op-amp/"&gt;FM Transmitter with Op-amp&lt;/a&gt; เครื่องส่ง (ไมค์ลอย) วิทยุเอฟเอ็ม ด้วยไอซี ออบแอมป์&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/one-watt-23-ghz-rf-amplifier-using-a-mrf2001image/"&gt;One Watt 2.3 GHz RF Amplifier using a MRF2001(Image)&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/rfi-suppression-techniques-in-dp83950a-ric-based-systems/"&gt;RFI Suppression Techniques in DP83950A (RIC) Based Systems&lt;/a&gt;&lt;span style="font-size:85%;color:#ff0000;"&gt;(NEW)&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/rf-frequency-linear-tuning-varactors-pdf-file/"&gt;RF Frequency Linear Tuning Varactors (PDF File)&lt;/a&gt;&lt;span style="font-size:85%;color:#ff0000;"&gt;(NEW)&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/simple-and-inexpensive-high-efficiency-power-amplifier-using-new-apt-mosfets/"&gt;Simple and Inexpensive High-Efficiency Power Amplifier Using New Apt MOSFETs&lt;/a&gt;&lt;span style="font-size:85%;color:#ff0000;"&gt;(NEW)&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-6380194709576118875?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/6380194709576118875/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/rf-circuits.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/6380194709576118875'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/6380194709576118875'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2010/02/rf-circuits.html' title='วงจรวิทยุรับส่ง rf circuits'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-5016386996050189645</id><published>2009-09-02T10:06:00.000-07:00</published><updated>2011-03-11T16:20:32.289-08:00</updated><title type='text'>small Metronome using 2N3904</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/small-metronome-using-2n3904/"&gt;http://www.elecfree.com/electronic/small-metronome-using-2n3904/&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-5016386996050189645?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/5016386996050189645/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/09/small-metronome-using-2n3904.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5016386996050189645'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/5016386996050189645'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/09/small-metronome-using-2n3904.html' title='small Metronome using 2N3904'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-7946238599161336460</id><published>2009-08-30T10:03:00.000-07:00</published><updated>2011-03-11T16:20:32.306-08:00</updated><title type='text'>Infrared Intruder Alarm</title><content type='html'>This the circuit warns the trespasser infrared system or Infrared Intruder Alarm circuit that interesting. By when there is a person passes or cut the light infrared.&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;a href="http://www.elecfree.com/electronic/infrared-intruder-alarm/"&gt;http://www.elecfree.com/electronic/infrared-intruder-alarm/&lt;/a&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-7946238599161336460?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/7946238599161336460/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/infrared-intruder-alarm.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7946238599161336460'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/7946238599161336460'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/infrared-intruder-alarm.html' title='Infrared Intruder Alarm'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-2354001271010591612</id><published>2009-08-24T10:46:00.000-07:00</published><updated>2011-03-11T16:20:32.320-08:00</updated><title type='text'>Two Tone Alarm with IC LM3900</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/two-tone-alarm-with-ic-lm3900/"&gt;http://www.elecfree.com/electronic/two-tone-alarm-with-ic-lm3900/&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-2354001271010591612?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/2354001271010591612/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/two-tone-alarm-with-ic-lm3900.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2354001271010591612'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2354001271010591612'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/two-tone-alarm-with-ic-lm3900.html' title='Two Tone Alarm with IC LM3900'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-3213171565468646295</id><published>2009-08-23T06:37:00.000-07:00</published><updated>2011-03-11T16:20:32.338-08:00</updated><title type='text'>Low pass filter circuit 10KHz using uA741</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/low-pass-filter-circuit-10khz-using-ua741/"&gt;http://www.elecfree.com/electronic/low-pass-filter-circuit-10khz-using-ua741/&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-3213171565468646295?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/3213171565468646295/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/low-pass-filter-circuit-10khz-using.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/3213171565468646295'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/3213171565468646295'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/low-pass-filter-circuit-10khz-using.html' title='Low pass filter circuit 10KHz using uA741'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-6587728770769299391</id><published>2009-08-17T08:15:00.000-07:00</published><updated>2011-03-11T16:20:32.353-08:00</updated><title type='text'>Small IC Amplifier 2 watt using LM380 | Circuit Project Electronic</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/small-ic-amplifier-2-watt-using-lm380/"&gt;Small IC Amplifier 2 watt using LM380 | Circuit Project Electronic&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-6587728770769299391?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/6587728770769299391/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/small-ic-amplifier-2-watt-using-lm380.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/6587728770769299391'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/6587728770769299391'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/small-ic-amplifier-2-watt-using-lm380.html' title='Small IC Amplifier 2 watt using LM380 | Circuit Project Electronic'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-4119975891132641829</id><published>2009-08-07T07:45:00.000-07:00</published><updated>2011-03-11T16:20:32.367-08:00</updated><title type='text'>Compares with sound level tool | Circuit Project Electronic</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/compares-with-sound-level-tool/"&gt;Compares with sound level tool | Circuit Project Electronic&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-4119975891132641829?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/4119975891132641829/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/compares-with-sound-level-tool-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4119975891132641829'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/4119975891132641829'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/compares-with-sound-level-tool-circuit.html' title='Compares with sound level tool | Circuit Project Electronic'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-8145289502364930990.post-2622712964516465397</id><published>2009-08-01T11:42:00.000-07:00</published><updated>2011-03-11T16:20:32.384-08:00</updated><title type='text'>Low impedance mini amplifier | Circuit Project Electronic</title><content type='html'>&lt;a href="http://www.elecfree.com/electronic/low-impedance-mini-amplifier/"&gt;Low impedance mini amplifier Circuit&lt;/a&gt;&lt;br /&gt;This circuit can apply to signal sound source that has low impedance , such as from 4-16 ohm size loudspeakers or telephone earphone that use to replace&lt;br /&gt;&lt;div class="blogger-post-footer"&gt;&lt;img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8145289502364930990-2622712964516465397?l=electro87-expert.blogspot.com' alt='' /&gt;&lt;/div&gt;</content><link rel='replies' type='application/atom+xml' href='http://electro87-expert.blogspot.com/feeds/2622712964516465397/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/low-impedance-mini-amplifier-circuit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2622712964516465397'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/8145289502364930990/posts/default/2622712964516465397'/><link rel='alternate' type='text/html' href='http://electro87-expert.blogspot.com/2009/08/low-impedance-mini-amplifier-circuit.html' title='Low impedance mini amplifier | Circuit Project Electronic'/><author><name>Andro</name><uri>http://www.blogger.com/profile/06582029022477874318</uri><email>noreply@blogger.com</email><gd:extendedProperty xmlns:gd='http://schemas.google.com/g/2005' name='OpenSocialUserId' value='01775349790199849622'/></author><thr:total>0</thr:total></entry></feed>