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!

Someday, Lock and Antenna Will Be Together

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cars,locked up,padlock,security
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I think the biggest kludge is the steering wheel on the other side. How does that happen???

~NSHA

This One's Not Going To Walk Away

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bike,dual use,flip flops,locked up
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When it gets stolen, look for the angry and shoeless man wandering about in confusion.

~NSHA