On Mon, 08 Feb 2010 14:34:01 +1300, "ivp" said:
> I wrote
> 
> > I notice there are a few mTouch PICs that I'd like to look at
> > personally one day
> >
> > http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2695
> 
> My ooops. I thought they were PICs with built-in sensors but it's
> implementations on ordinary parts

My experience with capacitive sensing is that you must use it in a
digital format, as an encoder rather than a potentiometer. Furthermore,
in an industrial application I would rate it less reliable than optical.

I would place a lot of faith in an Allen Bradley type J potentiometer. I
bet you get 10000 operating hours from one of them.

Cheerful regards,

Bob


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