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!

By Unknown
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I don't know what these students are studying but give them a degree. NOW. ~NSHA

clever dual use keys neat technology - 5310944512
By Joaquin Casarini
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The wireless version is much less practical.

~NSHA

art books clever computer cases DIY - 4458318336
By Unknown
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He uses this to read books online. Ironically. ~Not-So-Handy Andy