The scientists at the Fraunhofer Institute have developed a wireless transmitter powered by a human hand, electrical energy extracted by a thermoelectric generator (TEG) from the hand's slight temperature changes. The device is capable of producing a humble 200 millivolts (2mW), which is far less than what the application processor of the average handheld requires (about 1W). But the the body-powered circuit is a step in the right direction that could radically change our approach to alternative energy development.

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