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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.
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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.
Resources by ElectroMaster
Toy Organ
2012-09-17
This circuit produces a tone according to the button being pressed.
Fan Control Circuit (LM317)
2013-05-19
This is an illustrated tutorial on building a variable voltage control for fans and other units, ba
The 555 Timer
2012-04-07
The 555 timer is capable of producing accurate timing ranges from micro
The Basics of Bypass Capacitors
2012-02-01
This article will explain the function of a bypass capacitor, when its appropriate to use them, and
Introduction to Pulse Width Modulation
2012-01-26
A look at a powerful technique for controlling analog circuits with a microprocessor's digital outp
Common Resistor and Capacitor Values
2011-12-30
To manufacture resistors (or other components like capacitors) of every possible value would be imp
TV Remove Blocker
2011-12-18
Just point this small device at the TV and the remote gets jammed.
Modular Burglar Alarm
2011-11-08
This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision fo
20 Watt Power Amplifier
2011-09-22
This IC chip was designed specifically for use in power boosting applications in automobiles. It is
Simple Lie Detector
2011-09-10
Here's a simple lie detector that can be built in a few minutes, it is mean for fun and is obviousl
Simple Field Strength Meter
2011-09-10
This Field Strength Meter is simple and also quite sensitive. It uses an ordinary digital voltmeter
Stun Gun
2011-09-04
This stun gun is powered by a 9V battery. The transformer steps up the voltage to about 1800V (but
The 4017 Decade Counter
2011-08-01
[ATTACH=RIGHT]54828[/ATTACH]This handy Decade Counter (or sometimes called a Johnson Counter) can b
Jeopardy Quiz Game
2011-06-22
This electronic "Jeopardy" game circuit consists of four push-button switches. When one is pressed,
Computer Voltage Monitor
2011-06-16
This is an illustrated tutorial on building a voltage monitor for fan control circuits - rheostats,
Electronic Combination Lock
2011-03-10
This circuit is very basic to build. To open a the lock which is connected to the K1 Load you must
Voice Scrambler
2011-01-13
With this circuit you can modify how your voice sounds by changing the pitch of your voice. This ci
Water Activated Alarm
2010-09-04
The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of t
Audio Perimeter Monitor
2010-07-06
Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positione
Audio Notch Filter
2010-07-06
At first glance this circuit looks fairly complex, but when broken down,can be divided into high pa
Latest threads
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opinion request on 2 different comparator circuit designs- Started by earckens
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