Dave Tweed wrote:
> The only other option would be a bright light and a photocell -- very
> inefficient, but might be useful in certain applications.

A "quick and dirty" solution could be to couple two small DC motors
together (one driving the other as a dynamo).

--
------------ Alex Holden - http://www.linuxhacker.org ------------
If it doesn't work, you're not hitting it with a big enough hammer

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