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       #Post#: 1066--------------------------------------------------
       Physics now- heart pacemaker powered by heartbeat
   DIR By: Michel
       Date: November 7, 2012, 10:12 am
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       Engineers at the University of Michigan have created a pacemaker
       that is powered by thebeating of your heart — no batteries
       required. The technologybehind this new infinite-durati on
       pacemaker is piezoelectricit y. Piezoelectricit y is is
       literally 'pressure electricity,' and it relatesto certain
       materials that generate tiny amounts of electricity when
       deformed by an external force — which, in the case of the
       perpetual pacemaker, the vibrations in your chest as your heart
       pumps blood around your body. Piezoelectric devices generate
       very small amounts of power — on the order of tens of milliwatts
       — but it turns out that pacemakers require very little power.
       Read more:
  HTML http://goo.gl/
       p52qi
       -Physics now
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