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  • Canary chirp generator

    2018-02-28 15:16:3260

    Description. This is a simple electronic alarm circuit that imitates the chirping of a canary. The circuit is nothing but a Hartley oscillator with few...

  • Small FM Receiver Circuit

    2018-02-28 15:05:5461

    This is the most simple fm radio receiver with good performances that works great even if the sensitivity is not too high. The working principle of thi...

  • Metronome by 555

    2018-02-28 14:50:1162

    This is easy Metronome Circuit. It use IC 555 x2 and drive speaker. This be Metronome Circuit. For sound origin Metronome strange music is good. By use...

  • Handy Pen Torch circuit

    2018-02-28 14:20:3661

    This easy to construct Handy pen torch electronic circuit and low component count, uses two power white LEDs for lighting. Low volt (4.8V dc) supply av...

  • How the GSM system works?.

    2018-02-28 13:49:3861

    GSM. In various countries the frequency bandwidths specified for the GSM services are GSM-400, GSM-800, GSM-900, GSM-1800 and GSM-R.The GSM-900 and the...

  • Tiny Door Guard

    2018-02-28 13:48:3961

    This simpleDoor Chimeprotects the door and gives a loud Alarm tone when there is an attempt of theft. The circuit is too simple and battery operated. A...

  • Squelch circuit schematic

    2018-02-28 13:24:2461

    Squelch is a circuit that acts to suppress the audio (or video) output of a receiver in the absence of a sufficiently strong desired input signal. This...

  • NEGATIVE VOLTAGE Circuit

    2018-02-28 12:54:2262

    NEGATIVE VOLTAGE Circuit A negative supply can be produced by a Charge-Pump circuit created with a 555, diodes and capacitors as shown in the following...

  • Photoconductive cells

    2018-02-28 12:53:5262

    The photoconductive cell is a two terminal semiconductor device whose terminal resistance will vary (linearly) with the intensity of the inci-dent ligh...

  • Small FM Radio Circuit

    2018-02-28 12:52:3771

    Perhaps this is one of the simplest and smallest FM radio receiver that can receive the FM stations available locally. Its simple design makes it ideal...

  • Infrared Repeater System circuit

    2018-02-28 12:42:0963

    This infrared repeater system is used to extend the range of an infrared transmitter used at an audio or video equipment at 10 m. The original signal i...

  • Automobile turn signal circuit.

    2018-02-28 12:39:3962

    Description. This is a simple circuit that can be used as a sequential signal light in automobiles. The circuit is based on two ICs. A TS 555 CN CMOS t...

  • Neon tubes brightness adjustement

    2018-02-28 12:31:0361

    The brightness of a neon tube can not adjust as easily as that of a bulb with Incandescent tube because it starts only when a voltage much higher than ...

  • Sync Signal Separator

    2018-02-28 12:06:3864

    This simple sync signal separator circuit separates the composite sync signal into 2 separate horizontal and vertical sync signals. The composite signa...

  • Looking for guest writers

    2018-02-28 12:06:0061

    Hello, I am looking for guest writers that have good electronics engineering knowledge and can write in english very well. In the past there were 2 peo...

  • Resistor colour code wheel

    2018-02-28 12:01:0161

    This is a handy resistor colour code calculator that doesnt need power supply or to be installed on a PC. As you know most resistors use coloured bands...

  • Samsung SGH-N620 Service Manual

    2018-02-28 11:58:0961

    Samsung SGH-N620 is a dual-band mobile cellular phone. Samsung SGH-N620 service manual contents: 1. Exploded Views and Parts List 2. PCB Diagrams 3. El...

  • Miniature chip antenna Yageo

    2018-02-28 11:39:3460

    The industrys smallest 5320 Coupling Chip Antenna featuring low sensitivity to environment interference as well as less stray capacitance. Measuring on...

  • Precision full wave rectifier circuit

    2018-02-28 11:24:0861

    The use of Operational amplifiers can improve the?performance?of a wide?variety?of signal processing circuits. In rectifier circuits, the voltage drop ...

  • Metronome generator circuit.

    2018-02-28 11:07:4060

    Description. Here is a simple circuit using IC NE555 that can be used to generate metronomes.Such a circuit is very useful to those who learns music. T...

  • TOY ORGAN Circuit

    2018-02-28 10:49:2561

    TOY ORGAN Circuit This circuit produces a tone according to the button being pressed. Only 1 button can be pressed at a time, that's why it is called a...

  • DIY Tremolo Effect Circuit

    2018-02-28 10:43:5061

    This tremolo effect circuit uses the XR2206 and the TCA730 IC which is designed as an electronic balance and volume regulator with frequency correction...

  • BIONICS. An expert driver pursuit in Reverse Engineering

    2018-02-28 10:09:0062

    Bionicsis a scientific and technical discipline that takes ideas from biological systems to design engineering systems. It is sometimes called asBiomim...

  • Whistle to beep circuit

    2018-02-28 10:06:5761

    Description. This simple circuit produces a beeping sound that lasts for around 3 seconds whenever you make a whistle. The CMOS Hex inverter CD4049 is ...

  • TICKING BOMB Circuit

    2018-02-28 10:04:0162

    TICKING BOMB Circuit This circuit sound just like a ticking bomb. Reprinted Url Of This Article: http://www.555-timer-circuits.com/ticking-bomb.html De...

  • Electronic mosquito repeller

    2018-02-28 09:55:4161

    Description. Here is the circuit diagram of an ultrasonic mosquito repeller.The circuit is based on the theory that insects like mosquito can be repell...

  • Nokia N95 service manual

    2018-02-28 09:36:0261

    NOKIA N95 service manual for level 1 and 2 table of contents: - general repair information - exploded view - spare parts overview - general recycling -...

  • Dark activated relay circuit

    2018-02-28 09:25:5564

    This Dark activated Switch can trigger a relay to operate an AC lamp at Sunset. The lamp remains on till morning and then turns off. This eliminates th...

  • Antenna calculator and design software

    2018-02-28 09:19:3863

    Lets see some antenna calculator and antenna design software that will help you design faster and better. Please post a comment if you know other great...

  • Electromagnetic Radiation ? A Fact File

    2018-02-28 08:53:5962

    What is Electromagnetic Radiation? When you sit in front of a computer or television, you are being bombarded by harmful waves quietly emanating from i...

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