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Homemade Emergency LED Light Bulb
Using AC with LEDs (Part 3) - The BIG light
Hand Power Electricity Generation
DC Versus AC
LED Bulb from Household Wastes.
LED sign board
Ultra-bright Emergency Waterproof Torch DIY (Rechargeble)
93% efficient DC to DC Converter
Voltage doubler for wind generators
Using energy saver light circuit for LEDs (An improved energy saver light hacked from C…
Posted:Jan 2, 2013
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