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Make A Height Measuring Tool.
Free energy generators
MY DC POWER SUPPLY
MINI WIND TURBINE
Mini Hovercraft From a Dead Computer!
V10 (vawt,savonius,vertical axis,windturbine,ametek)
Potato Powered LED!
Hydroponic pump from recycled battery operated weed killer sprayer
Science fair: How accurate is the AC line frequency?
DC Versus AC
Posted:Feb 19, 2009
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