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Kinetic mp3 player

whirr, whirr
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My Seiko watch is from their "Kinetic" range. It never needs new batteries and never needs winding. Instead, there is a little weighted wheel inside the watch which swings around as the watch moves and produces power (You can see all this through a window in the back of the watch). If I leave the watch completely still for a couple of weeks, it'll run down.

This idea is for a flash memory mp3 player (i.e. low power consumption) based on the same principle.
hippo, Apr 13 2005

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       I wonder how much energy could be obtained if the entire length of the headphone cables were also lined with a piezoelectric transducer? The cables would pick up a lot of movement in use, and even if just sitting still, they'd pick up the nodding of the head to the choon of the moment.
Ian Tindale, Apr 13 2005
  

       Interesting - so, lower battery lifetimes if you listen to ambient music?
hippo, Apr 13 2005
  

       Possibly, correspondingly lower battery requirements in those circumstances also.
Ian Tindale, Apr 13 2005
  

       I had imagined an MP3 power supply hooked into a bicycle. Slow down and the music stops.
Worldgineer, Apr 13 2005
  
      
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