On Thu, 04 Mar 2010 10:27:43 +0000
Jonathan Gazeley wrote:
> On 04/03/10 10:20, James Morris wrote:
Instead of directly trying to measure RPM, measure milliseconds per
rev. then invert it. Once you have your first reading, then start to
average over 2/3 revs. gives you a pretty fast responding figure with a
Also, use a short range photocell on the spokes (say 50mm). Easy to
mount, reliable results with minimal effort. As these can usually
respond up to 10-30kHz you won't have to worry about pedalling too
Will J Godfrey
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
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