Source: http://hackedgadgets.com/2011/10/17/halloween-spooky-audio-trigger/
יום חמישי, 20 באוקטובר 2011
Halloween Spooky Audio Trigger
The circuit above is the Halloween Spooky Audio Trigger, it has a door contact sensor connected to it and when it detects that the door has opened it waits for a short time before scaring the pants off your trick or treaters with some spooky sounds! The detection of the door opening is actually the [...]
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