locked up

bike dual use flip flops locked up - 5424350976
By Unknown
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When it gets stolen, look for the angry and shoeless man wandering about in confusion.

~NSHA

bicycle bike dual use handcuffs locked up police - 4777163264
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Correct me if I'm wrong, but I'm pretty sure your evidence bag should be locked up as well. At the very least, protect your 32oz soda! ~Not-So-Handy Andy

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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!