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Very nice!I've also fiddled around with a lighting solution for my stairs to replace the traditional light bulb and came up with this:http://imgur.com/a/FWpA0Basically the same idea (PIR sensors and an atmega328) with a few tweaks. For me the goal was powering the thing with a 5V 1A phone charger (or a power bank), I wanted it to light up even if it was no power coming from the wall.
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