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Electronic Circuits

A collection of electronic circuits and projects you can build. Created by our very own members.

Top Articles

  1. Refrigerator Timer magvitron
    A timer for turning ON/OFF the refridgerator at peak load hours (6pm to 10 pm) using 8051
  2. I'm sick of counter requests.. So here's a few Ian Rogers
    counter
  3. LM317 Adjustable 20V, 1.5A Supply with Simple SMPS Tracking Preregulator crutschow
    LM317 supply with switching tracking prereg for good efficiency and minimal heat sink requirements.
  4. Power Analysers: True RMS Readings Barry Atkins
    What is true RMS or why does that matter?
  5. Alcohol detector and engine cut off. magvitron
    in order to start the car you have to blow to the sensor having a flowsensor (can be madeform a hea
  6. "The Scavenger" A Joule Thief inspired Boost regulator. ()blivion
    Presented here is a significant step forward in simple, cheep, and efficient boost converter design
  7. Monitor I2C Communications through RS232 languer
    In the past when requiring to monitor I2C communications between two devices I
  1. Articles are being shown from all child categories.
  2. shokjok

    Utility Trailer Taillight Interface

    This simple circuit was built 21 years ago, still works today. The PCB is designed around the se
    0/5, 0 votes
    Updated:
    Dec 18, 2011
  3. ElectroMaster

    TV Remove Blocker

    Just point this small device at the TV and the remote gets jammed.
    4/5, 1 vote
    Updated:
    Dec 18, 2011
  4. alec_t

    Dual-Mode Microphone Pre-Amplifier

    This is a microphone pre-amp which I designed for use with a SoundBlaster(TM) AWE 64 Value sound c
    0/5, 0 votes
    Updated:
    Dec 17, 2011
  5. alec_t

    Simple 3-Transistor Voltage Regulator (with current limiting)

    This article describes a simple 3-transistor voltage regulator with current limiting. It is based
    0/5, 0 votes
    Updated:
    Dec 17, 2011
  6. alec_t

    Auto Switch-Off Torch

    An elderly acquaintance who couldn't cope with battery recharging was getting through dry cells rap
    0/5, 0 votes
    Updated:
    Dec 17, 2011
  7. Jon Wilder

    Interfacing a Toshiba T6963C Equipped GLCD with a PIC Microcontroller

    So you happen to have a GLCD with the Toshiba T6963C display controller and you want to interface i
    0/5, 0 votes
    Updated:
    Dec 12, 2011
  8. ben7

    120v 4-LED Night Light

    This circuit uses can be used as a night light. It uses a 120v Mains to power the circuit. Works li
    1/5, 1 vote
    Updated:
    Nov 13, 2011
  9. ElectroMaster

    Modular Burglar Alarm

    This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision fo
    5/5, 1 vote
    Updated:
    Nov 7, 2011
  10. ElectroMaster

    20 Watt Power Amplifier

    This IC chip was designed specifically for use in power boosting applications in automobiles. It is
    4/5, 1 vote
    Updated:
    Sep 22, 2011
  11. VE7IT

    Capacitor ESR Tester

    This project was conceived as a way to enhance the collection of test equipment on my test bench. I
    0/5, 0 votes
    Updated:
    Sep 13, 2011
  12. ElectroMaster

    Simple Lie Detector

    Here's a simple lie detector that can be built in a few minutes, it is mean for fun and is obviousl
    0/5, 0 votes
    Updated:
    Sep 9, 2011
  13. sheldonstv

    Simple gated oscillator

    Here is a simple gated oscillator for you to play with. It's nothing complicated build wise but
    0/5, 0 votes
    Updated:
    Sep 9, 2011
  14. ElectroMaster

    Simple Field Strength Meter

    This Field Strength Meter is simple and also quite sensitive. It uses an ordinary digital voltmeter
    0/5, 0 votes
    Updated:
    Sep 9, 2011
  15. 3lectrix

    Infrared Proximity Detector

    This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like a
    0/5, 0 votes
    Updated:
    Sep 9, 2011
  16. 3lectrix

    Light Activated Switch

    The circuit is based on National Semiconductors comparator LM311 (IC1) and an LDR. The non invertin
    3/5, 3 votes
    Updated:
    Sep 4, 2011
  17. jrz126

    High Power H-Bridge

    I just built a high power H-Bridge for my inverted pendulum project and I thought I would share it.
    2/5, 1 vote
    Updated:
    Sep 3, 2011
  18. ElectroMaster

    Stun Gun

    This stun gun is powered by a 9V battery. The transformer steps up the voltage to about 1800V (but
    3/5, 1 vote
    Updated:
    Sep 3, 2011
  19. Boncuk

    LM555 for Air Cannon

    The idea is to have two monostables timers (LM555) for triggering the air cannon. Timer1 (IC1) i
    5/5, 1 vote
    Updated:
    Aug 27, 2011
  20. DesignerDan

    Simple, inexpensive vehicle immobilizer

    This vehicle immobilizer circuit is quite possibly the smallest, simplest, cheapest and easiest to
    0/5, 0 votes
    Updated:
    Aug 25, 2011
  21. carbonzit

    Simple Audio Signal Injector

    Here's a signal injector for those of us like me who don't have a bench full of nice test equipment
    4/5, 1 vote
    Updated:
    Jul 4, 2011