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Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positione
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Audio Notch Filter 2010-07-06
At first glance this circuit looks fairly complex, but when broken down,can be divided into high pa
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This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
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FM Transmitter (#1) 2010-07-06
This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
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Night Buzzer 2010-07-06
If you want revenge that won’t kill someone, just make them go insane, have I got the thing for y
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The current draw for this tracker is 3.7mA, so the 1.5V button cell will last awhile. What the heck
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AM Radio Receiver 2010-07-06
Here's a very simple AM Radio circuit I've designed couple of years ago. Don't know whether anybody
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Strobe Light 2010-07-06
Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and
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5 Zone Alarm System 2010-07-06
Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (u
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My original project is [URL="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1247631566/all"]here[/
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This cct uses 4026B ICs to drive 1.5" 7 Segment LED Displays. Even at 5volts these are quite bright
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For those who may be interested. A simple circuit/method/scheme for adding a serial port to that o
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Hi Guys,After designing this single chip Charlieplexed 24 hour [U]Clock[/U]/[U]Calendar[/U]/[U]
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Here is a project I worked on a while ago that I’ve finally got around to documenting. It inte
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Simple Coil Gun 2010-07-05
What is an coil gun? Its an prety fancy way of shoting projectiles out of an tube.It uses magnetic
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A few months ago, I decided to build a compact, yet effective alarm. My demands were:- simple const
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This is the improved version of the LED lamp posted about 1 year ago which ran on half wave rectifi
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I Just Updated my Car Detector project, Should anyone here need one.
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Don’t throw your old mouse do a fun project with it. This is the simplest project I have ever mad
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This 800 W light bulb flasher operates directly off the line and needs no transformer. Power for th
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