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  • Keyhole Finder circuit

    2018-02-28 23:19:43112

    This 3 volt Lithium cell operated LED flasher can be used as a key hole finder in darkness. A small lithium button cell can power the circuit more than...

  • Perfboard Circuit Construction

    2018-02-28 23:03:5896

    Here explains the types of general purpose PCBs and the method of circuit construction on aPerf board.Printed circuit board, or PCB, is used to mechani...

  • 7805 Regulator IC Circuits

    2018-02-28 22:45:0089

    Fixed voltage Positive and Negativeregulator ICsare used in circuits to give precise regulated voltage.78 XX seriesregulator IC can handle maximum 1 am...

  • Nokia 9300 Service Manual

    2018-02-28 22:36:2070

    Download Nokia 9300 service manual: - Nokia 9300 general specifications - Nokia 9300 parts lists - Nokia 9300 service software instructions - Service t...

  • Sony PS2 service manual

    2018-02-28 22:28:4577

    Sony PlayStation 2 SCPH-3000 series service manual this manual compiled by first edition of SCPH-30000, 30001, 30002, 30003, 30004 B, B’, C, C’, D ...

  • Time Delay Circuit

    2018-02-28 21:45:41107

    This Time Delay circuit is useful to switch on an AC load such as lamps after thedelayof three minutes. This protects the load frominrush currentandtra...

  • Hulda Clark's Zapper Circuit

    2018-02-28 21:34:30114

    Hulda Clark's Zapper Circuit This is the circuit for Dr. Hulda Clark's Zapper, designed in 2003. The frequency is approximately 30kHz positive offset s...

  • INCREASING OUTPUT CURRENT Circuit

    2018-02-28 21:25:2378

    INCREASING OUTPUT CURRENT Circuit The 555 will deliver 200mA to a load but the chip gets extremely hot (12v supply). The answer is to use a buffer tran...

  • Triangle Waveform Generator circuit with 555

    2018-02-28 21:08:1692

    The circuit is a triangle waveform generator that uses as few parts as possible. A 555 timer IC, 2 resistors and two capacitors make the triangle wave....

  • Current from an AC Capacitor

    2018-02-28 21:05:2374

    When acapacitorand aresistorare connected to AC lines, a constant current can be maintained through the resistor, so long as theRectanceof the capacito...

  • Tunnel diode

    2018-02-28 20:50:2086

    What is a tunnel diode? Dr.Leo Esaki invented a tunnel diode, which is also known as Esaki diode on behalf of its inventor. Its a high conductivity two...

  • Sawtooth Generator Circuit with 741 IC

    2018-02-28 20:47:1474

    This sawtooth generator circuit use 741 IC and is used as a musical sound synthesizer. The sawtooth input signal is continously changed through P2 to a...

  • Snap Action Relay circuit

    2018-02-28 20:43:4680

    When aRelay driver circuitis used inSensorbased electronic circuits, false triggering may occurs due to unwanted relay clicking. The input signal level...

  • 2.4GHz coaxial antenna

    2018-02-28 20:33:0791

    Some points about 2.4Ghz coaxial cable antenna for routers and Robotics Vehicles: Radio equipment using the license-free 2.4-GHz ISM (industrial/scient...

  • Electronic Organ Circuit

    2018-02-28 20:00:2886

    This electronic organ circuit is very simple to construct and is basically an emitter-coupled oscillator composed of T2 and T3. An squarewave voltage c...

  • PN junction breakdown characteristics

    2018-02-28 19:50:3063

    Diode-breakdown-characteristics When an ordinary P-N junction diode is reverse biased, normally only very small reverse saturation current flows. This ...

  • IR Infrared detector

    2018-02-28 19:32:5571

    This infrared detector can be used to detect the presence of modulated infrared signals in its vicinity from any electronic source, for instance, an IR...

  • Gas leak detector circuit

    2018-02-28 19:09:5965

    Here is a gas leak detector circuit that detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit operates off ...

  • Fast Charger circuit

    2018-02-28 18:50:5164

    Here is a High current charger for Fast charging sealed lead acid batteries used in Automobiles, Inverters etc. This charger can give 5 Ampere current ...

  • VLF VHF wideband active antenna

    2018-02-28 18:33:5361

    A 30 to 50 cm whip antenna provides reception from 10 MHz to over 220 MHz. T1 BF981, a dual-gate MOSFET, provides low noise, high-input impedance and h...

  • Touch potentiometer circuit

    2018-02-28 18:21:4162

    This sensitive touch potentiometer is based on IC1 (CA3130), one operational amplifier with a high input impedance. When the finger touches Se1 sensor ...

  • Dynamic compressor

    2018-02-28 18:17:0464

    This dynamic compressor with passive components reduces high signal to a lower, more constant signal. If you look at this compressor schematic , youll ...

  • IC 4060 Design Note

    2018-02-28 17:41:2261

    IC 4060 is an excellent integrated circuit for timing applications. Its ten active high outputs can give time delay from few seconds to hours. With a f...

  • ACTIVE HIGH TRIGGER Circuit

    2018-02-28 16:56:3966

    ACTIVE HIGH TRIGGER Circuit This circuit produces a HIGH output via a HIGH trigger: Reprinted Url Of This Article: http://www.555-timer-circuits.com/ac...

  • Regulator 5V,6V,9V,12V 1A By IC 7805,7806,7809,7812

    2018-02-28 16:36:2760

    When you build , electronic project , that have to use , power supply regulated source. I thinks you might something the circuit that has the height an...

  • Electronic siren circuit

    2018-02-28 16:29:4260

    Description. This is a compact electronic siren circuit based on three transistors.This circuit is suitable for in corporating with other alarm or sire...

  • VHF FM Antenna Booster Circuit

    2018-02-28 16:28:5163

    Together with a good directional antenna this high performance two-stage antenna amplifier for the VHF FM broadcast band will enable you to capture far...

  • Johnson Ring Counter Circuit with 74LS164

    2018-02-28 16:23:0068

    Counters have numerous application in Digital field. There are many types of counters, today we are going to explain about Johnson counter. Johnson cou...

  • FLIP FLOP and MEMORY CELL Circuit

    2018-02-28 15:20:3767

    FLIP FLOP and MEMORY CELL Circuit When output pin 3 is HIGH, the 220n charges through the 220k to 6v. When pin 3 is LOW, the 220n discharges through th...

  • Electronic Metronome circuit schematic

    2018-02-28 15:18:5760

    This metronome circuit schematic is not modern but is cheap and reliable. The well known 555 is presented in this metronome circuit and produces regula...

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