Over ten years ago Energy Harvesting was known only to a smalL group of research engineers at Siemens who started exploring the concept with questions such as: How much energy is produced by pressing a button? What amount of energy is there in the heat exchanged between the human skin and its surroundings? How much in the light that is used in the rooms where we live? Plus, how much energy does it take to power sensors that can metervalues and send them over the air?
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