1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

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. Wasp

    Simple Telephone Central Project

    This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER for training purpose
    5/5, 1 vote
    Updated:
    Sep 4, 2010
  3. ElectroMaster

    Water Activated Alarm

    The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of t
    4/5, 1 vote
    Updated:
    Sep 4, 2010
  4. k7elp60

    Competition (#3) Entry: Solar Powered Night LED’s

    This project uses a lead-acid battery to power some strings of LED’s at night for illumination of
    3/5, 1 vote
    Updated:
    Aug 7, 2010
  5. Boncuk

    Competition (#3) Entry: Canaria Furioso (Canary Simulator)

    The circuit has been designed to simulate a canary “Harzer Roller”. It consists of six timer IC
    5/5, 1 vote
    Updated:
    Aug 5, 2010
  6. rajbex

    A Variable DC Power Supply for Electronics Hobbyists

    A variable DC power supply is one of the most important tools for an electronics hobbyist. Most of
    0/5, 0 votes
    Updated:
    Jul 13, 2010
  7. Peter_wadley

    ULTRA clean 9VDC Power Supply Project

    Here is a small power supply project that I would like to share with all the members of this forum.
    0/5, 0 votes
    Updated:
    Jul 8, 2010
  8. ElectroMaster

    Audio Perimeter Monitor

    Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positione
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  9. ElectroMaster

    Audio Notch Filter

    At first glance this circuit looks fairly complex, but when broken down,can be divided into high pa
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  10. ElectroMaster

    FM Transmitter (#1)

    This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  11. zachtheterrible

    Night Buzzer

    If you want revenge that won’t kill someone, just make them go insane, have I got the thing for y
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  12. ElectroMaster

    1.5 Volt Tracking Transmitter

    The current draw for this tracker is 3.7mA, so the 1.5V button cell will last awhile. What the heck
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  13. transistor495

    AM Radio Receiver

    Here's a very simple AM Radio circuit I've designed couple of years ago. Don't know whether anybody
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  14. ElectroMaster

    FM Transmitter (#2)

    The FM Room Bug is a neat project that can be built for under $10. It is an electronic transmitter
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  15. ElectroMaster

    Strobe Light

    Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  16. ElectroMaster

    5 Zone Alarm System

    Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (u
    0/5, 0 votes
    Updated:
    Jul 6, 2010
  17. ParkingLotLust

    Arduino Displaying Temperature via 74HC595's to 7-Seg's

    My original project is [URL="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1247631566/all"]here[/
    0/5, 0 votes
    Updated:
    Jul 5, 2010
  18. oliverb

    Digital Master Clock with 7 Seg LED Displays & Hourly Ch

    This cct uses 4026B ICs to drive 1.5" 7 Segment LED Displays. Even at 5volts these are quite bright
    0/5, 0 votes
    Updated:
    Jul 5, 2010
  19. Mike - K8LH

    Simple RS232-to-TTL Adapter

    For those who may be interested. A simple circuit/method/scheme for adding a serial port to that o
    0/5, 0 votes
    Updated:
    Jul 5, 2010
  20. Mike - K8LH

    K8LH Novelty Single Chip Clock

    Hi Guys,After designing this single chip Charlieplexed 24 hour [U]Clock[/U]/[U]Calendar[/U]/[U]
    0/5, 0 votes
    Updated:
    Jul 5, 2010
  21. Pommie

    One Wire Temperature sensor (DS1820) to PC interface.

    Here is a project I worked on a while ago that I’ve finally got around to documenting. It inte
    0/5, 0 votes
    Updated:
    Jul 5, 2010