Hitachi Ltd has invented a generator that can convert the normal, tiny vibrations of buildings caused by wind, air conditioning equipment and elevators into useful electricity. The company announced the new technology in Seoul at the International Symposium on Low Power Electronics and Design (ISLPED). Prototype generators were able to produce 0.12 microwatts of electricity from vibrations of a few micrometers of amplitude. Hitachi plans to add sensors and wireless transceivers to future generators and put it all on a chip for sale to companies that can use it to power embedded computers and other devices.
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