Mythbusters Free Energy "Busted"
Feb 7, 2012
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the ring oscillator (referred to as a G-strain amplifier),
the Bedini motor (where the power generated from a motor is used to recharge itself),
the Minto Wheel (a solar-powered temperature wheel),
http://en.wikipedia.org/wiki/MythBusters_%282004_season%29#Free_Energy