tag:blogger.com,1999:blog-87470062011-12-12T19:00:54.537+05:30Electronic Circuit Diagrams and Design Ideasdelabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.comBlogger94125SchematicsOfDelabshttp://feedburner.google.comtag:blogger.com,1999:blog-8747006.post-25559141201326431042011-01-11T09:12:00.001+05:302011-01-11T12:17:13.881+05:302011-01-11T12:17:13.881+05:30Here is a easy to read 'Analog' Millivoltmeter. Just like the Moving Coil Voltmeter, but does not have that resolution. This gives a easy indication of process progress or parameter magnitude from a large distance. A bargraph is easy on decision making too, compared to a digital readout. How this...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/mImye6MmN0M4ikfvtJ8b3DFXfx0/0/da"><img src="http://feedads.g.doubleclick.net/~a/mImye6MmN0M4ikfvtJ8b3DFXfx0/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/mImye6MmN0M4ikfvtJ8b3DFXfx0/1/da"><img src="http://feedads.g.doubleclick.net/~a/mImye6MmN0M4ikfvtJ8b3DFXfx0/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/NvbaL9DCIpo" height="1" width="1"/>dapj Techhttp://www.blogger.com/profile/01498297887919410898noreply@blogger.com1http://schematics.dapj.com/2011/01/millivolt-meter-using-lm3914-led-dot.htmltag:blogger.com,1999:blog-8747006.post-17635758011356676132010-07-22T19:32:00.000+05:302010-07-22T19:33:40.104+05:302010-07-22T19:33:40.104+05:30This circuit is an interface between 89C52 of Atmel with 7135 of Intersil. With This circuit you can read analog data of both polarities you can change the range scale with extra circuits, you can store data on a EEPROM or send them to PC thru RS232 or Comm port. ICL7135 to Printer port...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/CApb0YciFbb8B-FFy7JqR03CbfU/0/da"><img src="http://feedads.g.doubleclick.net/~a/CApb0YciFbb8B-FFy7JqR03CbfU/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/CApb0YciFbb8B-FFy7JqR03CbfU/1/da"><img src="http://feedads.g.doubleclick.net/~a/CApb0YciFbb8B-FFy7JqR03CbfU/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/0y1OJCDeIto" height="1" width="1"/>dapj Techhttp://www.blogger.com/profile/01498297887919410898noreply@blogger.com0http://schematics.dapj.com/2010/07/interface-icl7135-voltmeter-to-atmel.htmltag:blogger.com,1999:blog-8747006.post-17411466650542970942010-07-16T16:44:00.001+05:302010-07-16T16:44:25.513+05:302010-07-16T16:44:25.513+05:30This is dual 555 multivibrator like power oscillator. This is my contraption and conception but couple of decades old. It appears to have errors. It worked but the document fixing after design worked, not done. This can be used to make a small inverter, for powering 230V gadgets of low power. The...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/TSXkYobE_q_OYY6_GRKySNCklD8/0/da"><img src="http://feedads.g.doubleclick.net/~a/TSXkYobE_q_OYY6_GRKySNCklD8/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/TSXkYobE_q_OYY6_GRKySNCklD8/1/da"><img src="http://feedads.g.doubleclick.net/~a/TSXkYobE_q_OYY6_GRKySNCklD8/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/OZ1kSSxfpQ4" height="1" width="1"/>dapj Techhttp://www.blogger.com/profile/01498297887919410898noreply@blogger.com0http://schematics.dapj.com/2010/07/555-multivibrator-like-power-oscillator.htmltag:blogger.com,1999:blog-8747006.post-74694229645465410972009-10-15T07:19:00.000+05:302009-10-15T07:23:08.665+05:302009-10-15T07:23:08.665+05:30This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in MCS-48. The 8051 integrated the hardware UART and...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/OLvZLiyv0TSBgta19h6u4V1Fgmk/0/da"><img src="http://feedads.g.doubleclick.net/~a/OLvZLiyv0TSBgta19h6u4V1Fgmk/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/OLvZLiyv0TSBgta19h6u4V1Fgmk/1/da"><img src="http://feedads.g.doubleclick.net/~a/OLvZLiyv0TSBgta19h6u4V1Fgmk/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/OolirGe9ZQs" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/10/interface-uc-to-pc-rs232-with-max232a.htmltag:blogger.com,1999:blog-8747006.post-25664380579102668312009-10-08T10:45:00.000+05:302010-02-08T08:38:46.671+05:302010-02-08T08:38:46.671+05:30This is a easy to build LED lamp circuit for Learning and building skills. This is the first draft schematic V 1.0. It will need improvements for Higher Power Lighting. From Schematics of delabs I will give a short summary, The LM317 here configured for around 6.4V DC. The Q3 BC547 limits...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/7Z9a4PjQu-QqyHsqwe61093lIuQ/0/da"><img src="http://feedads.g.doubleclick.net/~a/7Z9a4PjQu-QqyHsqwe61093lIuQ/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/7Z9a4PjQu-QqyHsqwe61093lIuQ/1/da"><img src="http://feedads.g.doubleclick.net/~a/7Z9a4PjQu-QqyHsqwe61093lIuQ/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/zQQ0VI7L46g" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/10/perpetual-candle-white-led-lamp-on-ni.htmltag:blogger.com,1999:blog-8747006.post-82259876567399185032009-02-22T07:05:00.000+05:302009-02-22T07:09:44.090+05:302009-02-22T07:09:44.090+05:30This is a LED Analog Meter, This can be used as a Resistance Meter and Low Impedance Voltmeter for Battery Levels. To measure battery voltage, the R5-R12-R17 etc. part of the Reference Resistor Divider Network can be modified to suit. Shown here is for 4 LEDs, Use Three LM324 for 12 or More LEDs...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/7zCmFkbz-s5io59D-I9eZL_o_V0/0/da"><img src="http://feedads.g.doubleclick.net/~a/7zCmFkbz-s5io59D-I9eZL_o_V0/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/7zCmFkbz-s5io59D-I9eZL_o_V0/1/da"><img src="http://feedads.g.doubleclick.net/~a/7zCmFkbz-s5io59D-I9eZL_o_V0/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/902Ypw3yXGg" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/resistance-measurement-analog-led-meter.htmltag:blogger.com,1999:blog-8747006.post-24350856216188102592009-02-20T11:35:00.000+05:302009-02-20T11:39:54.580+05:302009-02-20T11:39:54.580+05:30BCD Thumbwheel Switch is used to input-set data in digital form, this can be read by digital circuits, uC and uP systems and PLC-SCADA Interfaces. In the early transition of analog to digital, before uP became acceptable, Digital systems without uP were made, it even had printers, RAM and...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/xbhgr1bRGAzJ0IIWhojC2-EJzhk/0/da"><img src="http://feedads.g.doubleclick.net/~a/xbhgr1bRGAzJ0IIWhojC2-EJzhk/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/xbhgr1bRGAzJ0IIWhojC2-EJzhk/1/da"><img src="http://feedads.g.doubleclick.net/~a/xbhgr1bRGAzJ0IIWhojC2-EJzhk/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/QZDABCohxzU" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/analog-level-by-bcd-thumbwheel-switch.htmltag:blogger.com,1999:blog-8747006.post-31957823038671377852009-02-19T16:01:00.000+05:302009-02-19T16:06:13.845+05:302009-02-19T16:06:13.845+05:30When a Inverting Opamp Configuration is at a steady state, we say the Inverting Input is at a Virtual Ground. That means it is at 0V w.r.t to the dual power supply ground, but it cannot drive or draw any current. It is at a high impedance, but still at 0V. When you buffer this 0 V, you get a low...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/sRwc_FZuKSa9mmGFY6eQEwvPcNc/0/da"><img src="http://feedads.g.doubleclick.net/~a/sRwc_FZuKSa9mmGFY6eQEwvPcNc/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/sRwc_FZuKSa9mmGFY6eQEwvPcNc/1/da"><img src="http://feedads.g.doubleclick.net/~a/sRwc_FZuKSa9mmGFY6eQEwvPcNc/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/YfEXnOUEBdQ" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/opamp-supply-on-buffered-virtual-ground.htmltag:blogger.com,1999:blog-8747006.post-21874541382147389542009-02-19T13:10:00.000+05:302009-02-19T13:19:37.256+05:302009-02-19T13:19:37.256+05:30This was a small circuit made for driving an Impact counter. The heart being ICL8038. It must have been a Motor driving a Conveyor, the motor has a feedback attachment called Tachogenerator. Only part of the circuit is shown here. See the image of product here Tacho Counter. The configuration is...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/XGlLFThriX5U_p9vTwVK3HMNqDM/0/da"><img src="http://feedads.g.doubleclick.net/~a/XGlLFThriX5U_p9vTwVK3HMNqDM/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/XGlLFThriX5U_p9vTwVK3HMNqDM/1/da"><img src="http://feedads.g.doubleclick.net/~a/XGlLFThriX5U_p9vTwVK3HMNqDM/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/sY_As3hQPOI" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/voltage-to-frequency-converter-icl8038.htmltag:blogger.com,1999:blog-8747006.post-31932898806771244092009-02-19T11:50:00.000+05:302009-02-19T20:09:17.142+05:302009-02-19T20:09:17.142+05:30This is easy to rig millivolt source for field calibration or troubleshooting of 4-20 mA current loops. Here a Darlington pair is used for current amplification which reduces the Ib error as gain is very high. A rotary switch selects, 4-12-20 mA Preset points. A Bourns multi-turn wirewound Pot...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/Koxx77PyKq7qqodJXvjDP3m4T5w/0/da"><img src="http://feedads.g.doubleclick.net/~a/Koxx77PyKq7qqodJXvjDP3m4T5w/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/Koxx77PyKq7qqodJXvjDP3m4T5w/1/da"><img src="http://feedads.g.doubleclick.net/~a/Koxx77PyKq7qqodJXvjDP3m4T5w/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/jm_YrT4hM1I" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/millivolt-source-field-callibration.htmltag:blogger.com,1999:blog-8747006.post-77116164003478236932009-02-19T09:01:00.000+05:302009-02-19T09:07:11.166+05:302009-02-19T09:07:11.166+05:30In this circuit we tackle the error indicated in the earlier Current Source. The LM336-2.5V eliminates the tiny error of the regulated supply and resistors. Thereby increasing Precision to a higher degree. The opamp mirrors the stable 2.5V across P3 + R13. With P3 Bourns 10 Turn Trimpot you can...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/y_v74gqbIulYYKrLys0z1uGfcbg/0/da"><img src="http://feedads.g.doubleclick.net/~a/y_v74gqbIulYYKrLys0z1uGfcbg/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/y_v74gqbIulYYKrLys0z1uGfcbg/1/da"><img src="http://feedads.g.doubleclick.net/~a/y_v74gqbIulYYKrLys0z1uGfcbg/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/H9SCdiOpQhs" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/precision-op-amp-current-source.htmltag:blogger.com,1999:blog-8747006.post-13773052165107907622009-02-18T19:01:00.000+05:302009-02-18T19:09:22.306+05:302009-02-18T19:09:22.306+05:30Here is a current source you can build for resistance measurement. When the current is held constant, you know as per Ohm's Law the Voltage across Resistor is proportional to Resistance value. The supply is +12 and -12, The total voltage across R6 + R7 is 24V. Then 24V / 120K = 0.2mA. The...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/44TRZh8oCQub9jczWrT8XdzPztg/0/da"><img src="http://feedads.g.doubleclick.net/~a/44TRZh8oCQub9jczWrT8XdzPztg/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/44TRZh8oCQub9jczWrT8XdzPztg/1/da"><img src="http://feedads.g.doubleclick.net/~a/44TRZh8oCQub9jczWrT8XdzPztg/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/_7-AuSArvIo" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/current-source-for-resistance.htmltag:blogger.com,1999:blog-8747006.post-32569432811263400622009-02-17T15:40:00.000+05:302009-02-17T15:44:43.863+05:302009-02-17T15:44:43.863+05:30Measurement of resistor values in circuit configurations are required to be made often, as these might have changed in value due to various tolerance ranges, and hence could be the cause of faults. Likewise the resistance of components used in a circuit, may need to be known. In such cases the...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/wAMG64sS5Py44U2wyS7A2E5lSec/0/da"><img src="http://feedads.g.doubleclick.net/~a/wAMG64sS5Py44U2wyS7A2E5lSec/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/wAMG64sS5Py44U2wyS7A2E5lSec/1/da"><img src="http://feedads.g.doubleclick.net/~a/wAMG64sS5Py44U2wyS7A2E5lSec/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/6WG18V5lpWo" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/ohmmeter-simple-resistance-measurement.htmltag:blogger.com,1999:blog-8747006.post-85113935957920626432009-02-16T13:02:00.000+05:302009-02-16T14:10:10.810+05:302009-02-16T14:10:10.810+05:30Studying current measurement is a prerequisite for many of the measuring techniques. The current parameter mainly specifies the power consumption in a circuit, given the value of resistance. It is found convenient to measure current rather than voltage for knowing power output and determining...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/YTBdbR8OynYUy_cz1mix5Mo3CRE/0/da"><img src="http://feedads.g.doubleclick.net/~a/YTBdbR8OynYUy_cz1mix5Mo3CRE/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/YTBdbR8OynYUy_cz1mix5Mo3CRE/1/da"><img src="http://feedads.g.doubleclick.net/~a/YTBdbR8OynYUy_cz1mix5Mo3CRE/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/i_GdTEy1imU" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/ammeter-and-precision-rectifier.htmltag:blogger.com,1999:blog-8747006.post-64785841581519531532009-02-16T11:20:00.000+05:302009-02-20T11:46:30.437+05:302009-02-20T11:46:30.437+05:30The 0-1V to 4-20 mA Converter published earlier is a current sink, Here is a circuit that is a voltage to current converter but with a current source. You can use a LM358 or LM324. The first opamp is a Voltage to Current with a sink output. That current creates a varying voltage w.r.t the 12V DC...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/TR0Dqk19d96lH91y-X7vhIUzUko/0/da"><img src="http://feedads.g.doubleclick.net/~a/TR0Dqk19d96lH91y-X7vhIUzUko/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/TR0Dqk19d96lH91y-X7vhIUzUko/1/da"><img src="http://feedads.g.doubleclick.net/~a/TR0Dqk19d96lH91y-X7vhIUzUko/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/0R9DHOWj-Ug" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2009/02/voltage-to-current-source-4-20-ma.htmltag:blogger.com,1999:blog-8747006.post-41894833550963189882008-12-24T09:05:00.000+05:302009-01-25T07:39:37.557+05:302009-01-25T07:39:37.557+05:30This is a Test arrangement for Leakage Testing of Diodes on Reverse Bias. The leakage current indicates the ability of the diode to withstand higher voltages. An AutoTransformer or Variac can be used to vary the test voltage. Even Plastic capacitors can be tested for leakage this way. Safety...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/_BhegPNACS4VzJ3OEqUdAJYz2T0/0/da"><img src="http://feedads.g.doubleclick.net/~a/_BhegPNACS4VzJ3OEqUdAJYz2T0/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/_BhegPNACS4VzJ3OEqUdAJYz2T0/1/da"><img src="http://feedads.g.doubleclick.net/~a/_BhegPNACS4VzJ3OEqUdAJYz2T0/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/50bo6kLXX3E" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/diode-reverse-bias-leakage-tester.htmltag:blogger.com,1999:blog-8747006.post-27448699267682295792008-12-24T08:10:00.000+05:302009-01-25T17:30:06.313+05:302009-01-25T17:30:06.313+05:30Voltage multipliers are used to obtain low current high voltage, from an existing AC Source. Step up transformers can be used, but the insulation problems and care that has to be taken for HV above 1kV, make it difficult. After SMPS technologies and Ferrites were developed, HV for CRTs was...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/7ZEouR0KfcKf3AlDVvK9EPqIRmY/0/da"><img src="http://feedads.g.doubleclick.net/~a/7ZEouR0KfcKf3AlDVvK9EPqIRmY/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/7ZEouR0KfcKf3AlDVvK9EPqIRmY/1/da"><img src="http://feedads.g.doubleclick.net/~a/7ZEouR0KfcKf3AlDVvK9EPqIRmY/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/yLT7s0oJkFM" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/voltage-doublers-and-multipliers.htmltag:blogger.com,1999:blog-8747006.post-7778725099900218132008-12-16T08:00:00.000+05:302009-01-26T07:05:33.153+05:302009-01-26T07:05:33.153+05:30When you have to buffer and invert the polarity of mV input levels. This is the circuit you can use, as OP07 has uV offset. R9 and R10 can be 100K 1% MFR or better. Use a symmetrical dual supply. OP07: Ultralow Offset Voltage Operational Amplifier<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/bGVLbFmnhAUk5bVHMdjO028uAfI/0/da"><img src="http://feedads.g.doubleclick.net/~a/bGVLbFmnhAUk5bVHMdjO028uAfI/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/bGVLbFmnhAUk5bVHMdjO028uAfI/1/da"><img src="http://feedads.g.doubleclick.net/~a/bGVLbFmnhAUk5bVHMdjO028uAfI/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/_Em-UV3zpPo" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/dual-polarity-analog-output-op-amps.htmltag:blogger.com,1999:blog-8747006.post-87902074715306461352008-12-15T15:15:00.001+05:302009-01-26T08:28:51.624+05:302009-01-26T08:28:51.624+05:30When Instruments are designed a analog front end is essential and also as most equipment have digital or microcontroller interface the analog circuit needs to have digital access. The Circuits DACT0008 and DACT0009 are both useful in building instruments which have digital control. This circuit...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/tdge9ePr4TCFdtkyFO8-21dmlzQ/0/da"><img src="http://feedads.g.doubleclick.net/~a/tdge9ePr4TCFdtkyFO8-21dmlzQ/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/tdge9ePr4TCFdtkyFO8-21dmlzQ/1/da"><img src="http://feedads.g.doubleclick.net/~a/tdge9ePr4TCFdtkyFO8-21dmlzQ/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/H-ebkLT2MU0" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/precision-amplifier-with-digital-uc.htmltag:blogger.com,1999:blog-8747006.post-58709382369169897922008-12-14T13:30:00.000+05:302009-01-26T09:51:38.172+05:302009-01-26T09:51:38.172+05:30The proximity switch can work for a wide range of power, from 8v to 18v DC, D3 protects reverse power supply connections, and U1 regulates the supply to +5v , -5v is derived from U2 555 oscillator which serves dual purpose. Circuit Operation The infra red diode D2 detector gets the reflected...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/bBiKibVIuahZISltYZ501CxNn_U/0/da"><img src="http://feedads.g.doubleclick.net/~a/bBiKibVIuahZISltYZ501CxNn_U/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/bBiKibVIuahZISltYZ501CxNn_U/1/da"><img src="http://feedads.g.doubleclick.net/~a/bBiKibVIuahZISltYZ501CxNn_U/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/dQK6oa2-ZB8" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/infrared-detector-for-proximity-switch.htmltag:blogger.com,1999:blog-8747006.post-22591931243044773622008-12-14T12:30:00.000+05:302009-01-26T09:52:03.464+05:302009-01-26T09:52:03.464+05:30This circuit is used to detect objects by reflected infrared light. It can be built into a cylindrical enclosure just like an inductive proximity switch. This is also useful as a level detector for colored liquids like oil. This has some immunity to ambient sunlight as it detects ac pulses. IC...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/Jr8Xl_Ww00KZc_Chl4qKliv2rnw/0/da"><img src="http://feedads.g.doubleclick.net/~a/Jr8Xl_Ww00KZc_Chl4qKliv2rnw/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/Jr8Xl_Ww00KZc_Chl4qKliv2rnw/1/da"><img src="http://feedads.g.doubleclick.net/~a/Jr8Xl_Ww00KZc_Chl4qKliv2rnw/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/dDuJx5y3W5c" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/infrared-led-flasher-for-optical-switch.htmltag:blogger.com,1999:blog-8747006.post-86447067877010800882008-12-11T04:55:00.000+05:302009-01-26T08:29:38.063+05:302009-01-26T08:29:38.063+05:30When Instruments are designed a analog front end is essential and also as most equipment have digital or microcontroller interface the analog circuit needs to have digital access. The Circuits DACT0008 and DACT0009 are both useful in building instruments which have digital control. Precision...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/RDtWUKXcmKHLbCatXbVhDKJUv2A/0/da"><img src="http://feedads.g.doubleclick.net/~a/RDtWUKXcmKHLbCatXbVhDKJUv2A/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/RDtWUKXcmKHLbCatXbVhDKJUv2A/1/da"><img src="http://feedads.g.doubleclick.net/~a/RDtWUKXcmKHLbCatXbVhDKJUv2A/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/T2U_YknV-x0" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/12/precision-attenuator-for-digital-uc.htmltag:blogger.com,1999:blog-8747006.post-73823737001899991092008-10-22T09:51:00.000+05:302009-01-26T07:06:30.579+05:302009-01-26T07:06:30.579+05:30Here is the circuit of a Op-Amp based Square Wave Generator. One of the main application of this is in a Simple PWM circuit and Triangle Opamp Oscillator. The Slope of the Triangle wave is compared with a DC Level to derive a pulse width or On-Time proportional to a Voltage. This On-Time...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/AQUJQhXY7widzXrknUCanK5GuwQ/0/da"><img src="http://feedads.g.doubleclick.net/~a/AQUJQhXY7widzXrknUCanK5GuwQ/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/AQUJQhXY7widzXrknUCanK5GuwQ/1/da"><img src="http://feedads.g.doubleclick.net/~a/AQUJQhXY7widzXrknUCanK5GuwQ/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/WBDLi8UjgPg" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/10/square-and-triangle-opamp-oscillator.htmltag:blogger.com,1999:blog-8747006.post-36772531198746207552008-10-15T14:00:00.000+05:302009-01-27T08:42:19.731+05:302009-01-27T08:42:19.731+05:30A Center tap 50Hz Step Down Transformer with two diodes is used to get a train of Positive Sine Pulses at 100Hz which is applied to Q6 base via R51. 2N2646 is a unijunction transistor(UJT) in a TO-18 metal package. The control voltage or voltage proportional to error is fed to R56-Q3, The UJT...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/Xj1HdmWU4GR2KGVkNiCbUGoVo_Y/0/da"><img src="http://feedads.g.doubleclick.net/~a/Xj1HdmWU4GR2KGVkNiCbUGoVo_Y/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/Xj1HdmWU4GR2KGVkNiCbUGoVo_Y/1/da"><img src="http://feedads.g.doubleclick.net/~a/Xj1HdmWU4GR2KGVkNiCbUGoVo_Y/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/0qoJQZAngGM" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/10/2n2646-based-voltage-controlled-scr.htmltag:blogger.com,1999:blog-8747006.post-68891061784638739162008-07-03T17:25:00.000+05:302009-01-26T09:57:43.749+05:302009-01-26T09:57:43.749+05:30This is a AC Control Input AC Output SSR Solid State Relay. When a Process Controller has an AC output or a system generates an AC signal of above 100V AC to signal the load to turn on, this device can be used. A BTA40-600 and MOC3041 are used in this. A high voltage plastic cap limits current...<br/> <br/> This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web. <p><a href="http://feedads.g.doubleclick.net/~a/xvrEdYMA5yHOumnlh9yGmAladSA/0/da"><img src="http://feedads.g.doubleclick.net/~a/xvrEdYMA5yHOumnlh9yGmAladSA/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/xvrEdYMA5yHOumnlh9yGmAladSA/1/da"><img src="http://feedads.g.doubleclick.net/~a/xvrEdYMA5yHOumnlh9yGmAladSA/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/SchematicsOfDelabs/~4/zu_JWUBGz84" height="1" width="1"/>delabshttp://www.blogger.com/profile/13912180441358913305noreply@blogger.com0http://schematics.dapj.com/2008/07/ac-ac-ssr-solid-state-relay.html