security

cars locked up security wheels - 4989724416
By -Ghost-
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And they'd really want your rusted, Russian-made monstrosity to begin with.

~NSHA

security turnstile Subway - 6677192704
By Noplay
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Putting the "style" in turnstile, amiryte?

locked up Professional At Work security - 5126783232
By Unknown
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They were so close to stealing the whole extension cord.

~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!