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'Secret Knock' Door Lock defends home from rhythmically-impaired perps (video)
Thursday, November 5, 2009
The Arduino board has been the engine of many wild and wacky projects over the years, from bakery tweeting to various musical instruments. For its next trick, our man Steve Hoefer has taken his microcontroller and, along with a piezoelectric speaker, a gear reduction motor, and some PVC pipe, programmed it to listen for a preset sequence of knocks -- a secret knock, if you will -- and unlock the ...
Original article from http://www.engadget.com/2009/11/04/secret-knock-door-lock-defends-home-from-rhythmically-impaired/
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