well, you can get something like this for $10 from the bicycle section of the local store prolly:
Bicycle Bike 16 function Computer Odometer Speedometer - eBay (item 290513040703 end time Dec-18-10 17:28:08 PST)
just have to figure out where to mount the magnet and the reed switch.
It's about the cheapest/lowest power (button cell) option there is for tracking distance/speed.
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WINDMILLS DO NOT WORK THAT WAY!!!
Last edited by dcb; 12-16-2010 at 10:32 PM..
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