Doorknob touch alarm

Posted on Sep 30, 2012

The project was originally intended as a present for my brothers dorm room, but a bad capacitor and the lack of a proper oscilloscope caused delays. It has not made it off the breadboard, and it probably will not until his next semester. The circuit contains a few basic elements, an flip-flop based oscillator, a set of delays, a flip-flop as a sensor, and the audible alarm.

Doorknob touch alarm
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Divide-By-N + 1/2 Circuit
Video Signal Carrier Circuit
Make this Solar Powered Fence Charger Circuit
ta8122 am fm radio receiver electronic project circuit design
10 led simple roulette wheel circuit
kaizer sstc ii
make mini logic analyzer
Quiz Circuit