clever

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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!

clever dual use fan - 5419396608
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The fan, unlike the totem, will stop spinning eventually.

~NSHA

clever DIY hiding - 4598599936
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The creator will not take responsibility for stashing items other than cash and flash drives. ~Not-So-Handy Andy