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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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"Safe Blocks" / mains quick connection terminals- Started by tomizett
- Replies: 3
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Discolored corners in crt tv: What is the reason? How to solve?- Started by Tanmay_Karmakar
- Replies: 3
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An Interesting find at Banggood – HX711 Strain Gauge Signal Conditioner Module
- Started by Visitor
- Replies: 2
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