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  • Numeric Water Level Indicator circuit

    2018-02-26 18:44:5960

    Most water-level indicators for water tanks are based upon the number of LEDs that glow to indicate the corresponding level of water in the container. ...

  • Electronic Siren with Multitone

    2018-02-26 18:29:5860

    This multitone electronic siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more earcatching t...

  • BUILDING THE CIRCUITS

    2018-02-26 18:28:3561

    BUILDING THE CIRCUITS The fastest way to put a circuit together is on BREADBOARD. The cheapest and best bread-board has power-rails and sets of tie-poi...

  • Electronic Thermostat LM56

    2018-02-26 18:27:5660

    This fan controller is using an electronic thermostat LM56 produced by National Semiconductor. The LM56 is a precision low power thermostat. Two stable...

  • VHF active antenna

    2018-02-26 18:06:4260

    A simple vhf active antenna using a single BFG65 transistor which is a low noise type. The telescopic antenna and the wide band rf amplifier combinatio...

  • LM7805 voltage regulator

    2018-02-26 18:02:1468

    Voltage regulator ICs, with 3 pins, from LM7805 and LM7812 series are excellent for usage in voltage regulator circuits. If you need higher currents, u...

  • Electronic muscle stimulator circuit

    2018-02-26 17:22:0360

    This is an electronic muscle stimulator circuit that stimulates nerves of that part of your body where electrodes are attached. Can be used for diy ele...

  • How to store cables and cords

    2018-02-26 17:06:2960

    This is an easy way to store cables, for example usb cables and power cords. I saw this idea for the first time a while ago on a website but I do not r...

  • Precision Monostable circuit

    2018-02-26 16:50:4061

    Here is a Monostable Multivibrator using IC CD4538. It is a Precision Monostable / Astable Multivibrator IC free from false triggering. This can be use...

  • SCHMITT TRIGGER (Hysteresis) Circuit

    2018-02-26 16:43:3560

    SCHMITT TRIGGER (Hysteresis) Circuit Can also be called AN INVERTER or a SCHMITT INVERTER We have animated the circuit to show how the output goes high...

  • 78XX Voltage Regulator circuit

    2018-02-26 16:19:5861

    IC 78XX Seriesincludes three terminal positive voltage regulators commonly available inTO 220 package. These are useful in wide range of applications t...

  • ROULETTE Circuit

    2018-02-26 14:01:3961

    ROULETTE Circuit This circuit creates a rotating LED that starts very fast when a finger touches the TOUCH WIRES. When the finger is removed, the rotat...

  • Biofeedback by skin resistance

    2018-02-26 13:58:3860

    This simple circuit makes it possible for a particular type of biofeedback. The principle underlying the observation that a persons skin resistance dep...

  • Mobile Scanner Circuit

    2018-02-26 13:28:1361

    Here is a device to locate the mobile phone. It emits intermittent flashes and beeps to indicate the presence of an active mobile phone. The circuit be...

  • Service guide manual LG RZ-20LA60 lcd tv

    2018-02-26 13:23:2760

    Here you can downloadLG RZ-20LA60 LCD TVService manual guide. The service guide manual contents: LG RZ-20LA60 trouble shootingPrinted circuit boardBloc...

  • Sound shifter circuit

    2018-02-26 12:53:4061

    ?Description. Here is superb sound shifter circuit that can be used to add effects to the input sound signal.The circuit is ideal for incorporating in ...

  • TBA120 demodulator circuit

    2018-02-26 12:25:1960

    The TBA120 Series ICs provide a high-gain limiting IF amplifier and a quadrature coincidence detector in one package. These ICs are primarily intended ...

  • Dew Detector Probe Circuit

    2018-02-26 12:25:0261

    This simple and economical Dew Detector Probe circuit works on 5V dc supply. It is useful for checking the presence of dew (condensed moisture) inside ...

  • Loudspeaker peak indicator

    2018-02-26 11:59:4663

    Modern loudspeakers boxes are relatively insensitive to overdriving signals, however it is still important to limit the power driving it to avoid clipp...

  • DARK DETECTOR Circuit

    2018-02-26 11:24:1360

    DARK DETECTOR Circuit When the level of light on the photo-cell decreases, the 555 is activated. Photo-cells (Photo-resistors) have a wide range of spe...

  • GigaHertz Signal Detector circuit

    2018-02-26 11:21:3261

    This circuit is useful to detect microwave (gigahertz signal) sources like microwave oven, satellite communication devices, Mobile phones etc. It gives...

  • Low current relay circuit

    2018-02-26 11:00:1260

    This low current relay circuit is designed to be used in battery operated electronic devices. Its operating current is in micro amperes (A). This is do...

  • ACTIVE LOW TRIGGER Circuit

    2018-02-26 10:51:1564

    ACTIVE LOW TRIGGER Circuit This circuit sits LOW and the output goes HIGH when the push-button is pressed. When the normally-closed push button is pres...

  • UNEVEN CLICKS Circuit

    2018-02-26 10:47:5861

    UNEVEN CLICKS Circuit This circuit produces two clicks then a short space before two more clicks etc. Changing the voltage on pin, 5 via the diode, adj...

  • SMT soldering

    2018-02-26 10:43:0860

    printedcircuitsboards.com published a tutorial to explain how to solder SMD chips onto PCBs. It is very well explained and has 2 videos where you can s...

  • Pulse generator circuit with 555

    2018-02-26 10:34:5762

    This is a pulse generator with adjustable duty cycle made with the 555 timer IC. The circuit is an astable multivibrator with a 50% pulse duty cycle. T...

  • DRIVING A RELAY Circuit

    2018-02-26 10:25:2962

    DRIVING A RELAY Circuit The 555 willactivate a relay. When pins 2 and 6 are connected as an input, the chip requires only about 1uA to activate the out...

  • Infrared intrusion barrier

    2018-02-26 10:03:0961

    Description. Here is the circuit diagram of an infrared intrusion detector. Whenever a trespasser cuts the invisible infrared beam an alarm sound will ...

  • Tricky Charger circuit

    2018-02-26 10:02:2360

    Here is a crude but efficienttricky chargerfor Lead Acid Battery. It uses a12 volt car bulbas current regulator and charge status indicator. The bright...

  • Peak indicator circuit schematic TLC272

    2018-02-26 09:59:4962

    Thispeak indicatorcircuit signals thru 2 leds the exceeding of a pre-estabilished value of any stereo audio channel. Signals from the 2 channels are re...

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