tag:blogger.com,1999:blog-6240469629267407912Fri, 10 Apr 2026 09:51:31 +0000Audio amplifiersElectronics Basicselectronic componentPower SupplyElectronic CircuitsTransistorElectronic Circuit DesignerDiodesled circuit555 Timer CircuitLEDDesign SoftwareSolar powerBattery Charger CircuitsTimerThyristors triacs diacsRadio ReceiversResistorsElectronics Newsgraphic equalizer circuitالقسم العربىمبادىء الالكترونياتAlarm Circuitselectronic component symbolsWireless CircuitCapacitorsCoils and transformersIntegrated circuitsDatasheetshttp://worldtechnical.blogspot.com/noreply@blogger.com (World Finance)Blogger529125en-usyesworldtechnicalelectronic,circuit,repair,Power,Supply,capacitor,subwoofer,amplifier,Battery,stereo,timer,audio,Transistor,resistor,pcb,circuit,boardThe world of technology, electronics, electronic circuit and audio amplifier and electronic circuit design and services are many other free worldtechnicalworldtechnicalmostfa_me@yahoo.comworldtechnicaltag:blogger.com,1999:blog-6240469629267407912.post-8753310274844173927Fri, 01 Sep 2017 19:31:00 +00002017-09-01T21:33:57.388+02:00Audio amplifiers The TDA7265 is class AB Dual Audio Power amplifier assembled in the @ Multiwatt package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. Key Features SHORT CIRCUIT PROTECTION STAND-BY FEATURE (LOW Iq) WIDE SUPPLY VOLTAGE RANGE (UP TO +25V ABS MAX.) HIGH OUTPUT POWER\t25+25W @THD = 10%, RL= 8Ω, http://worldtechnical.blogspot.com/2017/09/25-25-w-stereo-amplifier.html4mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-5203154024994760611Wed, 12 Sep 2012 16:31:00 +00002012-09-12T18:31:20.480+02:00Solar power This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available. With the help of such a photo-voltaic panel we can construct an economical, simple but efficient and truly portable solar lantern unit. Next important component required is a high power (1watt) white LED module. When solar panel is well exposed to sunlight, about 9 volt dc available from the http://worldtechnical.blogspot.com/2012/09/portable-solar-lantern-circuit-uses-6.html12mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-5624427688012850490Thu, 01 Mar 2012 12:03:00 +00002012-06-30T22:17:14.442+02:00Battery Charger CircuitsSolar power We propose to build a solar battery charger that will charge a variety of batteries: NiMH, NiCd, Li-ion, lead acid. Although there are solar battery chargers on the market, most are only for one application: cell phone, NiMH batteries, etc. Our charger will have the user input the battery type, capacity, and voltage. It will display the charge status and incorporate various safety http://worldtechnical.blogspot.com/2012/03/solar-powered-battery-charger.html2mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3058890988651231519Wed, 29 Feb 2012 12:54:00 +00002012-09-09T01:19:34.420+02:00Solar power When connecting a solar panel to a rechargeable battery, it is usually necessary to use a charge controller circuit to prevent the battery from overcharging. Charge control can be performed with a number of different circuit types. Lower power solar systems can use a series analog charge controller. Series regulators control the charging current by interrupting the flow of current from the http://worldtechnical.blogspot.com/2012/02/solar-charger-controller-circuit.html3mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-5267443830744104323Wed, 29 Feb 2012 12:05:00 +00002018-01-09T18:00:33.023+02:00Battery Charger CircuitsSolar power A simple solar charger circuit can be constructed using this circuit diagram . The nominal voltage of the solar charger circuit module is determined by the number of battery cells to be charged. Because of the typical voltage drop of 0.3 to 0.4 V across Schottky diode D1, the nominal voltage should exceed the charge voltage set on P1 by about 0.3–0.4 V . The solar panel for this project ishttp://worldtechnical.blogspot.com/2012/02/solar-charger-circuit-diagram.html1mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-5681740032460221940Wed, 29 Feb 2012 11:34:00 +00002012-06-30T22:02:21.310+02:00Electronics BasicsSolar power As renewable energy is becoming integrated into our everyday lives, new terms such as solar panel, photovoltaic and solar cell are more common and new devices, such as outdoor LED lighting are using this technology. The sun emits many forms of radiation. The best way to describe this is that there are ‘waves’ of energy that radiate from the sun at different frequencies. This is only http://worldtechnical.blogspot.com/2012/02/explaining-solar-cells.html2mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-1283094520313877363Tue, 28 Feb 2012 03:30:00 +00002014-11-05T11:12:20.962+02:00Electronic Circuit Designer TinyCAD is an open source schematic capture program for MS Windows. Use TinyCAD to produce professional circuit diagrams and export net list information to PCB applications. Description TinyCAD is a program for drawing circuit diagrams commonly known as schematic drawings. It supports standard and custom symbol libraries. It supports PCB layout programs with several http://worldtechnical.blogspot.com/2012/02/download-tinycad-open-source-schematic.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-7396746292529279981Tue, 28 Feb 2012 03:11:00 +00002014-11-05T11:09:40.214+02:00Electronic Circuit Designer Download the easy-to-use free PCB design software. You'll be designing in minutes and get feedback on your design in seconds. &nbsp;Free PCB Layout Software The free Pad2Pad CAD PCB layout software includes the easy-yet-powerful features you need to design your boards: &nbsp;Design Your board Multiple pad types - single layer, multi-layer, vias, rectangular, round Variety of trace http://worldtechnical.blogspot.com/2012/02/download-free-pcb-design-software.html5mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-7480392847708743815Tue, 28 Feb 2012 02:56:00 +00002014-11-05T11:15:47.092+02:00Electronic Circuit Designer TINA Design Suite is a powerful yet affordable circuit simulation and PCB design software package for analyzing, designing, and real time testing of analog, digital, VHDL, MCU, and mixed electronic circuits and their PCB layouts. You can also analyze SMPS, RF, communication, and optoelectronic circuits; generate and debug MCU code using the integrated flowchart tool; and test http://worldtechnical.blogspot.com/2012/02/tina-design-suite-v9.html1mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-5682378199698077954Tue, 28 Feb 2012 02:31:00 +00002014-11-09T15:44:33.100+02:00Electronic Circuit Designer 5Spice provides Spice specific schematic entry, the ability to define and save an unlimited number of analyses, and integrated graphing of simulation results. Plus easy inclusion of Spice/PSpice® models from a user expandable library. The focus is on analog circuit analysis and design at the component level. Student level MOSFET IC design is also supported but not compatible with HSpice® http://worldtechnical.blogspot.com/2012/02/5spice-easy-to-use-analog-circuit.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-1615860363875160566Tue, 28 Feb 2012 02:16:00 +00002012-02-28T04:21:16.219+02:00Electronic Circuit Designer<!-- google_ad_client = "ca-pub-8932952703439347"; /* 336x280, تم إنشاؤها 05/01/11 */ google_ad_slot = "4854547066"; google_ad_width = 336; google_ad_height = 280; //--> pcb is free software for designing printed circuit board layouts. It has many features and is capable of professional-quality output. It is available for UN*X operating systems, e.g., GNU/Linux, Mac OS-X, or Cygwin under http://worldtechnical.blogspot.com/2012/02/pcb-version-30-printed-circuit-board.html3mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3661565742044158417Sun, 26 Feb 2012 19:34:00 +00002014-11-05T11:32:39.210+02:00Electronic Circuit Designer free pcb artist layout software FREE Printed Circuit Board Layout Software... "PCB ARTIST™"....With Features such as "Multi-Page Schematic" and "Netlist Import"&nbsp; source: 4pcb.com http://worldtechnical.blogspot.com/2012/02/free-pcb-artist-layout-software.html1mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3220870108342910774Sun, 26 Feb 2012 17:28:00 +00002014-11-05T11:21:48.618+02:00Electronic Circuit Designer With Sprint-Layout you can design your PCB’s quick and easy. There is no unnecessary “ballast” which makes it difficult to keep the overview or which makes the usage almost impossible. Because of the logical and understandable structure of Sprint-Layout the usage is very easy to learn. So finally, you can concentrate to the essential thing: Designing and optimizing your PCB-layouts. http://worldtechnical.blogspot.com/2012/02/with-sprint-layout-you-can-design-your.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3477812254208896977Sun, 26 Feb 2012 17:08:00 +00002014-11-05T12:57:53.070+02:00Electronic Circuit Designer sPlan is a software with already many thousands enthusiastic users. You need a software to design your schematic circuit diagrams easy and fast? You won’t get pass sPlan! No matter if you only want to sketch a little circuit diagram or if you need to design a big project with several pages. The handling of sPlan is really quite simple. The components can be drawn from the http://worldtechnical.blogspot.com/2012/02/splan-70-schematic-editor-for-windows.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-7679524657502006315Sun, 26 Feb 2012 06:12:00 +00002014-11-05T12:59:40.648+02:00Electronic Circuits LIGHT ALARM - 3 (MOVEMENT DETECTOR) This circuit is very sensitive and can be placed in a room to detect the movement of a person up to 2 metres from the unit. The circuit is basically a high-gain amplifier (made up of the first three transistors) that is turned on by the LDR or photo Darlington transistor. The&nbsp; third transistor charges the 100u via a diode and this delivers http://worldtechnical.blogspot.com/2012/02/light-alarm-mmovement-detector.html1mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-321126625098119017Sun, 26 Feb 2012 06:02:00 +00002014-11-05T13:00:57.640+02:00Electronic Circuits signal by-pass This circuit allows a class-A amplifier to drive a low impedance speaker and has a low quiescent current. The 220R in series with the speaker limits the "wasted" current to about 20mA max as the transistor is generally biased at mid-voltage. However the transistor will be almost directly driving the speaker when a signal is being processed and the only limitation ishttp://worldtechnical.blogspot.com/2012/02/signal-by-pass.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-6177305118805001388Sun, 26 Feb 2012 05:50:00 +00002012-09-12T17:27:19.060+02:00Electronics BasicsTransistor TESTING AN unknown TRANSISTOR The first thing you may want to do is test an unknown transistor for COLLECTOR, BASE AND EMITTER. You also need to know if it is NPN or PNP. You need a cheap multimeter called an ANALOGUE METER&nbsp; - a multimeter with a scale and pointer (needle). It will measure resistance values (normally used to test resistors) - (you can also test other http://worldtechnical.blogspot.com/2012/02/testing-unknown-transistor.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-7482039537368747493Thu, 23 Feb 2012 19:04:00 +00002012-02-23T21:04:06.097+02:00Audio amplifiersHA1377 Bridge Amplifier BCL cap 17W (Car audio)This is circuit Car audio Amplifier(Bridge Amplifier BCL) , It use IC HA1377, Supply Volt 12V-13V. Speaker 4 OHM. Nice Circuit and Easy to Build. &nbsp; Circuit HA1377 Bridge Amplifier BCL cap 17W Tags :TA7227P, power, audio, amplifier http://worldtechnical.blogspot.com/2012/02/bridge-amplifier-car-audio-by-using.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3852333977924456646Thu, 23 Feb 2012 04:38:00 +00002012-06-30T22:09:01.001+02:00Electronics BasicsSolar power what is solar energy? Solar power is energy generated from the heat or light from the sun which can be used to produce heat, light, hot water, electricity, and cooling in a wide variety of applications .&nbsp; When we say something is solar powered, we mean that the energy it uses was converted directly from solar energy or sunlight energy. Solar energy is often referred to as an "alternativehttp://worldtechnical.blogspot.com/2012/02/what-is-solar-power.html1mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-9106093552441253960Thu, 23 Feb 2012 02:33:00 +00002012-02-23T04:37:25.575+02:00Electronics BasicsLEDTHE RESISTOR The value of the current limiting resistor can be worked out by Ohms Law. Here are the 3 steps: 1. Add up the voltages of all the LEDs in a string.&nbsp;&nbsp; e.g:&nbsp; 2.1v + 2.3v + 2.3v + 1.7v = 8.4v 2. Subtract the LED voltages from the supply voltage.&nbsp; e.g:&nbsp; 12v - 8.4v = 3.6v 3. Divide the 3.6v (or your voltage) by the current through the string.&nbsp; http://worldtechnical.blogspot.com/2012/02/light-emitting-diode-part-iv.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-2569763455934355465Thu, 23 Feb 2012 02:27:00 +00002014-01-29T23:18:52.672+02:00Electronics BasicsLED LEDs ARE CURRENT DRIVEN DEVICES A LED is described as a CURRENT DRIVEN DEVICE.&nbsp; This means the illumination is determined by the amount of current flowing through it. The brightness of a LED can be altered by increasing or decreasing the current. The effect will not be linear and it is best to experiment to determine the best current-flow for the amount of illumination you wanthttp://worldtechnical.blogspot.com/2012/02/light-emitting-diode-part-iii.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3832636943267649640Thu, 23 Feb 2012 02:14:00 +00002014-11-05T13:10:28.422+02:00Electronics BasicsLED The voltage dropped across this resistor, combined with the current, constitutes wasted energy and should be kept to a minimum, but a small HEAD VOLTAGE is not advisable (such as 0.5v). The head voltage should be a minimum of 1.5v - and this only applies if the supply is fixed. The head voltage depends on the supply voltage. If the supply is fixed and guaranteed not to increasehttp://worldtechnical.blogspot.com/2012/02/light-emitting-diode-2.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-2243315482345684198Thu, 23 Feb 2012 02:12:00 +00002012-09-12T17:32:36.042+02:00Electronics BasicsLED CONNECTING A LED A LED must be connected around the correct way in a circuit and it must have a resistor to limit the current. The LED in the first diagram does not illuminate because a red LED requires 1.7v and the cell only supplies 1.5v. The LED in the second diagram is damaged because it requires 1.7v and the two cells supply 3v. A resistor is needed to limit the http://worldtechnical.blogspot.com/2012/02/light-emitting-diode.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-3777593728829392551Thu, 23 Feb 2012 01:59:00 +00002012-02-23T03:59:00.665+02:00LEDThis circuit uses the latest&nbsp; TE555-5 LED FX chip from Talking Electronics. This 8-pin chip and drives 3 LEDs. The circuit can be assembled on matrix board. The circuit produces 12 different sequences including flashing, chasing, police lights and flicker. It also has a feature where you can create your own sequence and it will show each time the chip is turned on. http://worldtechnical.blogspot.com/2012/02/circuit-produces-12-different-sequences.html0mostfa_me@yahoo.com (worldtechnical)tag:blogger.com,1999:blog-6240469629267407912.post-1837672459038005150Thu, 23 Feb 2012 01:49:00 +00002012-02-24T02:08:26.821+02:00Battery Charger CircuitsCharge your 12v Sealed Lead-Acid batteries It turns off and the LED flashes when the battery is charged . . .&nbsp; Some typical Sealed Lead Acid batteries&nbsp;Before we go into the operation of the SLA Battery Charger circuit, there are a number of points we need to cover about the care and use of Sealed Lead Acid batteries.&nbsp; Firstly, these batteries must be charged, http://worldtechnical.blogspot.com/2012/02/charge-your-12v-sealed-lead-acid.html4mostfa_me@yahoo.com (worldtechnical)