[clug] O/T Digital Position sensing

[David Tulloh]

Ben Nizette wrote:
> On Tue, 2009-11-03 at 11:11 +1100, Keith Goggin wrote:
>   
>> I need to know the position of a shaft ...
> The /simplest/ thing for absolute position I can think of given the
> limited range is a potentiometer and ADC.
They come packaged together and are generally referred to as encoders.

Farnell sells them from $10,
http://au.farnell.com/absolute

Incremental (relative) encoders are much cheaper and start from $1.50.
http://au.farnell.com/incremental

I would recommend one of those over hacking up a mouse.  You get a 
better end result with known specs for only a few bucks.


David