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Build Like A Pyro!
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Take Me To The Gadgetory!
Automated Light Control/Visitor Counter

Posted July 17, 2011 by Chris

Today’s article covers some simple ground, specifically using 555 timers with IR transmitter/receiver pairs. The project uses these to keep track of how many people come in and out of the room as well as turning the lights on when someone enters. The circuit is straight forward, but gives insight on how to create the common 38 KHz carrier frequency IR circuits use.

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