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Three State Voltage Indicator circuit
2018-02-27 22:53:5361This is an ideal circuit to monitor the Voltage level in 12 volt Lead Acid batteries used in Inverters .For the perfect operation of Inverters, the bat...
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Transients Indicator circuit
2018-02-27 22:41:0862Instant voltage transients are common in the power lines especially in places where machinery is operating. Inductive loads and high power transformers...
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The Art of Zener Regulation
2018-02-27 22:29:0360To get precise voltage to a circuit, the simplest and easy way is to use a Zener diode.It uses the reverse breakdown voltage characteristics to maintai...
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Electronic dog repellent project
2018-02-27 22:09:1960The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller...
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UJT Organ circuit
2018-02-27 21:55:5360Description. Here is the circuit diagram of a simple yet interesting mini organ based on UJT 2N 4891 (Q1). You can produce the desired sound by pressin...
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Air flow detector circuit.
2018-02-27 21:51:1561Description. This circuit can give a visual indication of the rate of air flow.It can be also used to check whether there is air flow in a given space....
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Beeper 110dB
2018-02-27 21:34:1161This beeper circuit will generate an car-splitting 110dB from 9V. The setup uses a single 74C14 (CD40106B) CMOS hex inverting Schmitt-trigger IC, which...
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Radio field signal strength indicator
2018-02-27 21:00:2860A radio field signal strength indicator is very usefull for determine radiation patterns of transmitters antennas. An ancillary antenna must be put clo...
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Robot Voice Generator
2018-02-27 20:59:5862Those of you who imagine that a robot voice generator box would require a whole heap of ICs are mistaken; the ISD2500 ChipCorder family of ICs from Win...
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High Frequency Generator circuit
2018-02-27 20:51:2561High frequency waveform generator is very useful in electronic experiment and design. This circuit generate sine wave oscillation, but actually we can ...
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Varactors
2018-02-27 19:36:4860What is a varactor?A varactor (or a tuning diode) is a diode designed to be used as a voltage controlled capacitor. Its schematic symbol is shown in Fi...
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Sound Generator: The Old West Sounds
2018-02-27 18:39:4061This sound generator circuit will produce 6 sound effects from the old west and it shows how far integration can be taken: IC1, a Type HT82207 from Hol...
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FM antenna booster circuit
2018-02-27 18:19:4461This is a low cost fm antenna booster that can be used to listen to programmes from distant FM stations clearly. The antenna fm booster circuit compris...
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IR Beam breaker circuit
2018-02-27 18:17:3860This is anInfrared beam breaking alarmideal to use in entry or passages.It is based on the working of the popular IR sensor ModuleTSOP 1738which senses...
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Ultrasonic pest repellent circuit
2018-02-27 18:14:4860There are many ultrasonic pest repellent devices available on the market but a major drawback is that their power output is low and their effectiveness...
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USB
2018-02-27 18:10:4060The easiest way to connect computer peripherals is through aUniversal Serial Bus. The USB is a plug-and-play interface between the PC and the periphera...
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Step Down Transformer
2018-02-27 18:03:3360A step-down transformer is one whose secondary voltage is less than its primary voltage. It is designed to reduce the voltage from the primary winding ...
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Mini AM Radio circuit
2018-02-27 17:36:5460This AM receiver circuit is based ob the IC ZN415 introduced by Ferranti. This IC is an improved version of the early ZN414. It is a complete AM radio ...
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Photo diodes
2018-02-27 17:14:5760photo-diode-construction-symbol Photo-diode is a two-terminal semiconductor P-N junction device and is designed to operate with reverse bias. The basic...
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POLICE SIREN Circuit
2018-02-27 17:13:3960POLICE SIREN Circuit ThePolice Sirencircuit uses two 555's to produce an up-down wailing sound. The first 555 is wired as a low-frequency oscillator to...
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Intercom circuit, intercom schematic
2018-02-27 17:11:2260In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. The 10K potentiometer controls volume and the total gain ca...
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KNIGHT RIDER Circuit
2018-02-27 17:01:2460KNIGHT RIDER Circuit This circuit mimics the lights in knight rider's car. They flash one at a time chasing each other. Overview In the Knight Rider ci...
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Zipcharge Quick Charger
2018-02-27 16:19:0760Why you may need a zipcharge quick charger? With so many devices around these days, making sure they have enough juice to run on is essential wherever ...
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12V Dimmer circuit
2018-02-27 15:25:1760A dimmer is quite unusual in a caravan or on a boat. Here we describe how you can make one. So if you would like to be able to adjust the mood when you’...
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Sony KLV-S26A10/S32A10/S40A10 service manual
2018-02-27 15:12:5360Sony LCD TV KLV-S26A10/S32A10/S40A10 television service manual contains: SELF-DIAGNOSIS FUNCTION .. 1-1 2. DISASSEMBLY .. 2-1 2-1. KLV-S26A10/S32A10 2-...
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Electroscope
2018-02-27 15:08:5760This diy electroscope circuit can precisely measure electrostatic charge. The charge to be measured is stored on C1 (a high quality MKT capacitor with ...
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10 Minute timer circuit.
2018-02-27 14:50:1360Description. When ever you need to get an alarm or intimation after ten minutes ,the circuit shown below can be used.The circuit is nothing but? a mono...
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Temperature Meter circuit
2018-02-27 14:47:1561This temperature meter uses the precision micro power centigrade sensor IC LM35. The output voltage of the IC is linearly equal to 10Mv per degree cent...
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9 V regulator using 7809
2018-02-27 14:47:1060Description. Here is the circuit diagram of 9 V regulator using popular 7809 IC. The 7809 is a 9 Volt voltage regulator IC with features such as intern...
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REACTION TIMER GAME Circuit
2018-02-27 14:45:0060REACTION TIMER GAME Circuit This is a game for two players. Player 1 presses theSTARTbutton. This resets the 4026 counter chip and starts the 555 oscil...
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