shake videos
added 2008 Tue Mar 25 15:40:15
This flashlight is based on Faradays Law of Inductance: a magnet passes back and forth between a wire coil giving charge to capacitor that powers the LED. Nice thing to have in emergency situations.. It is ...
This flashlight is based on Faradays Law of Inductance: a magnet passes back and forth between a wire coil giving charge to capacitor that powers the LED. Nice thing to have in emergency situations.. It is ...
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