Quote:
Originally Posted by Rickshaw
Okay, so like infrared then, that's a neat idea I'd love to see it in use. I've thought about toying with those dinky door alarms to try and hook up a solar panel from like a calculator to it, and then putting the whole thing in a dark box in the middle of the day so when it's opened the alarm goes off.
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Don't have to be a solar panel (unless you really want to power it by sun), you can get a Photoresistor (they are really cheap) and a door alarm activated by vibration (they are cheap, too). Simply replace the switch with a Photoresistor will make it activate by light.