Secret Knock Detector

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Steve Hoefer at Grathio labs shows off his Arduino based door opener, which responds to knocks on the door bye timing the gaps between the sounds. If the gap matches the programmed knock, it unlocks. Let's never use keys again!

Know a little bit about Arduino and care to make your own? Check out his Instructables post!

It Feels Good To Be Needed

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door,dual use,phone,security
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Being on hold, as frustrating for doors as it is for humans.

~Not-So-Handy Andy

Stoopid Security Systems

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door lock,lock,security,slide lock
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I think I got stupider just from looking at this.

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