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.




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