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Vibration into Electricity?

  1. Nov 27, 2009 #1
  2. jcsd
  3. Nov 27, 2009 #2
    I know what it does but what's the mechanism that turns vibration into electricity?
  4. Nov 27, 2009 #3


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    The key word you want to search is http://en.wikipedia.org/wiki/Piezoelectricity" [Broken]
    Last edited by a moderator: May 4, 2017
  5. Nov 28, 2009 #4


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    That generator is not piezoelectric. The URL the OP linked to describes how it works very well:

    "The sugar cube-sized generator, a smaller version of a design already commercially available, uses cantilever-mounted magnets to induce a current in a copper coil"

    Basically, magnets shake around more than the copper coils. Magnetic flux through the coils changes, which induces a current in the coil via Faraday's law of induction.
  6. Nov 28, 2009 #5
    Those readers who are old enough to remember 33 RPM vinyl records may recall the magnetic pickup cartridge:
    This pickup came in two configurations; moving magnet and moving coil. Neither had any battery or external power supply. Both work on the Faraday induction law.
    Bob S
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