On Mon, 17 Mar 2008, alan smith wrote:

> Well..I agree....but the mechanical setup (rather complicated) doesn't 
> allow for magnets so Im stuck with the optics.  I much prefer hall 
> sensors....well, lets face it...its digital..on or off, not something in 
> between

could you have two sensors, arranged such that one is looking at a white 
area while the other is looking at a black area and only count transitions
when they both agree on a colour change. This would compensate for the 
glitch only happening in the black area.

Regards
Sergio
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