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LEDs as temperature sensors
Hand Power Electricity Generation
Excess Energy Pulse Motor
How To Create a Rechargable LED Flashlight
Step Down Voltage Regulator for fischertechnik - useful for power led and more
Galileo Ramps: exploring velocity and acceleration with marble and inclined planes
Current Regulated LED Tester
high voltage joule thief!
Build an LED Analyzer
The Oakland Toy Lab
Posted:Apr 10, 2009
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