security

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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!

security lock gate - 6970393344
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There's no way anyone is getting in here. Don't even try.

cars classy dual use security wheels - 5519867136
By doze
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Put your cinder blocks away, those wheels aren't worth anything.

~NSHA