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  • Three State Voltage Indicator circuit

    2018-02-27 22:53:5361

    This 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...

  • Transients Indicator circuit

    2018-02-27 22:41:0862

    Instant voltage transients are common in the power lines especially in places where machinery is operating. Inductive loads and high power transformers...

  • The Art of Zener Regulation

    2018-02-27 22:29:0361

    To 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...

  • Electronic dog repellent project

    2018-02-27 22:09:1972

    The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller...

  • UJT Organ circuit

    2018-02-27 21:55:5360

    Description. 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...

  • Air flow detector circuit.

    2018-02-27 21:51:1562

    Description. 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....

  • Beeper 110dB

    2018-02-27 21:34:1161

    This beeper circuit will generate an car-splitting 110dB from 9V. The setup uses a single 74C14 (CD40106B) CMOS hex inverting Schmitt-trigger IC, which...

  • Radio field signal strength indicator

    2018-02-27 21:00:2860

    A radio field signal strength indicator is very usefull for determine radiation patterns of transmitters antennas. An ancillary antenna must be put clo...

  • Robot Voice Generator

    2018-02-27 20:59:5862

    Those 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...

  • High Frequency Generator circuit

    2018-02-27 20:51:2562

    High frequency waveform generator is very useful in electronic experiment and design. This circuit generate sine wave oscillation, but actually we can ...

  • Varactors

    2018-02-27 19:36:4860

    What 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...

  • Sound Generator: The Old West Sounds

    2018-02-27 18:39:4061

    This 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...

  • FM antenna booster circuit

    2018-02-27 18:19:4461

    This 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...

  • IR Beam breaker circuit

    2018-02-27 18:17:3860

    This 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...

  • Ultrasonic pest repellent circuit

    2018-02-27 18:14:4862

    There are many ultrasonic pest repellent devices available on the market but a major drawback is that their power output is low and their effectiveness...

  • USB

    2018-02-27 18:10:4062

    The 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...

  • Step Down Transformer

    2018-02-27 18:03:3360

    A 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 ...

  • Mini AM Radio circuit

    2018-02-27 17:36:5460

    This 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 ...

  • Photo diodes

    2018-02-27 17:14:5760

    photo-diode-construction-symbol Photo-diode is a two-terminal semiconductor P-N junction device and is designed to operate with reverse bias. The basic...

  • POLICE SIREN Circuit

    2018-02-27 17:13:3960

    POLICE 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...

  • Intercom circuit, intercom schematic

    2018-02-27 17:11:2260

    In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. The 10K potentiometer controls volume and the total gain ca...

  • KNIGHT RIDER Circuit

    2018-02-27 17:01:2461

    KNIGHT 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...

  • Zipcharge Quick Charger

    2018-02-27 16:19:0760

    Why 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 ...

  • 12V Dimmer circuit

    2018-02-27 15:25:1760

    A 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’...

  • Sony KLV-S26A10/S32A10/S40A10 service manual

    2018-02-27 15:12:5360

    Sony 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-...

  • Electroscope

    2018-02-27 15:08:5761

    This diy electroscope circuit can precisely measure electrostatic charge. The charge to be measured is stored on C1 (a high quality MKT capacitor with ...

  • 10 Minute timer circuit.

    2018-02-27 14:50:1360

    Description. 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...

  • Temperature Meter circuit

    2018-02-27 14:47:1562

    This 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...

  • 9 V regulator using 7809

    2018-02-27 14:47:1060

    Description. 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...

  • REACTION TIMER GAME Circuit

    2018-02-27 14:45:0061

    REACTION 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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