security

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

bad puns bathroom kludge dual use pencil security - 4963804928
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Did I just make a pun about writing utensils and poop, based on a popular idiom? Yes. Yes I did. You're welcome.

~NSHA

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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!

door lock lock security slide lock - 6200219136
By Unknown
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I think I got stupider just from looking at this.