> Have you considered a coil and magnet instead ? I've seen creations using=
 a
> relay coil (many turns of fine wire) and a neodymium magnet passing it or
> flipping near it as a magneto/dynamo
>=20
> Joe

I would suggest trying Joe's suggestion, and use one of the energy harvesti=
ng ICs that are around these days. Microchip have some energy harvesting ch=
ips, but I haven't investigated them, so can't comment on how well they wou=
ld work.



--=20
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