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Articles from ElectroMaster

  1. ElectroMaster

    Toy Organ

    This circuit produces a tone according to the button being pressed.
    0/5, 0 votes
    Updated:
    Sep 18, 2013
  2. ElectroMaster

    Fan Control Circuit (LM317)

    This is an illustrated tutorial on building a variable voltage control for fans and other units, ba
    5/5, 1 vote
    Updated:
    May 19, 2013
  3. ElectroMaster

    The 555 Timer

    The 555 timer is capable of producing accurate timing ranges from micro
    5/5, 4 votes
    Updated:
    Apr 7, 2012
  4. ElectroMaster

    The Basics of Bypass Capacitors

    This article will explain the function of a bypass capacitor, when its appropriate to use them, and
    5/5, 1 vote
    Updated:
    Jan 31, 2012
  5. ElectroMaster

    Introduction to Pulse Width Modulation

    A look at a powerful technique for controlling analog circuits with a microprocessor's digital outp
    0/5, 0 votes
    Updated:
    Jan 26, 2012
  6. ElectroMaster

    Common Resistor and Capacitor Values

    To manufacture resistors (or other components like capacitors) of every possible value would be imp
    0/5, 0 votes
    Updated:
    Dec 29, 2011
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. ElectroMaster

    The 4017 Decade Counter

    [ATTACH=RIGHT]54828[/ATTACH]This handy Decade Counter (or sometimes called a Johnson Counter) can b
    5/5, 2 votes
    Updated:
    Jul 31, 2011
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. ElectroMaster

    Basic Soldering & Desoldering Guide

    The most fundamental skill in order to construct any electronic project is soldering (and desolderi
    0/5, 0 votes
    Updated:
    Jul 11, 2010
  20. 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