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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. SyPTo
    0/5, 0 votes
    Updated:
    Jun 30, 2011
  3. ElectroMaster

    Jeopardy Quiz Game

    This electronic "Jeopardy" game circuit consists of four push-button switches. When one is pressed,
    0/5, 0 votes
    Updated:
    Jun 21, 2011
  4. 3lectrix

    Digital Stop Watch

    A digital stop watch built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7
    0/5, 0 votes
    Updated:
    Jun 17, 2011
  5. RODALCO

    GPO 36 master clock contact impulse debouncer

    GPO 36 master clock contact de-bouncer I decided to build this circuit after my Gents GPO 36 mas
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  6. cyb0rg777

    Alarm - With Infrared Remote

    I built this circuit recently and decided to do a rough schematic and post it here.It is a car alar
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  7. 3lectrix

    Digital Code Lock

    This is a simple but effective code lock circuit that has an automatic reset facility. The circuit
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  8. ElectroMaster

    Computer Voltage Monitor

    This is an illustrated tutorial on building a voltage monitor for fan control circuits - rheostats,
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  9. 3lectrix

    Police Siren (NE555)

    Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 ti
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  10. 3lectrix

    Dark Detector

    The dark detector circuit shown here can be used to produce an audible alarm when the light inside
    0/5, 0 votes
    Updated:
    Jun 16, 2011
  11. arijit18

    DC Motor Control (using a single switch)

    SUMMARY As a Hobby, I have devised this module and named it as “ DC Motor control using IC 755
    0/5, 0 votes
    Updated:
    May 15, 2011
  12. c36041254

    Simple Black Line Follower

    I just have finished my first ROBOT project, a very simple black line follower. I am posting the co
    0/5, 0 votes
    Updated:
    May 15, 2011
  13. kinjalgp

    10 Channel Light Bulb Sequencer

    Here is a simple 10 channel light bulb sequencer circuit which you can build up to decorate your ho
    0/5, 0 votes
    Updated:
    May 15, 2011
  14. jakeselectronics

    Digital Temerature Sensor

    This circuit is a Digital Temerature Sensor using a Dallas '1-wire' DS18B20 Digital Thermometer
    0/5, 0 votes
    Updated:
    Apr 26, 2011
  15. ElectroMaster

    Electronic Combination Lock

    This circuit is very basic to build. To open a the lock which is connected to the K1 Load you must
    4/5, 1 vote
    Updated:
    Mar 10, 2011
  16. languer

    Basic IR Communications

    Creating an infrared (IR) communications link can be very useful. Some examples of projects which
    3.5/5, 2 votes
    Updated:
    Feb 7, 2011
  17. Pommie

    RS232 keypad with autorepeat and 2 key rollover.

    This project uses a 12F508 (or 12F509) to read a keypad and send the results over RS232. It is most
    0/5, 0 votes
    Updated:
    Feb 5, 2011
  18. ElectroMaster

    Voice Scrambler

    With this circuit you can modify how your voice sounds by changing the pitch of your voice. This ci
    4/5, 2 votes
    Updated:
    Jan 12, 2011
  19. Iceman_Chris

    FM Transmitters

    I have quite a few so I decided to post many FM transmitter schematics.
    4/5, 1 vote
    Updated:
    Oct 29, 2010
  20. gramo

    PS/2 (AT) Keyboard Module (Swordfish)

    [IMG]http://static.electro-tech-online.com/imgcache/10346-ps2_keyboard.jpg[/IMG] I recently wrote
    0/5, 0 votes
    Updated:
    Oct 3, 2010
  21. rajbex

    Serial LCD for low pin-count microcontrollers

    Low pin-count microcontrollers like PIC12F series don't have enough I/O ports to directly drive a s
    0/5, 0 votes
    Updated:
    Sep 27, 2010