> Instead of going for a low value pot, why not just use a 0.1uF cap
> at the input to the ADC?  It then becomes the low impedance source
> during sampling. Might cut down on noise at the same time

Sorry Gordon, I missed your post

You're right, an external cap will be the immediate Z the ADC sees.
As this is a motor speed control, sampling frequency is pretty low,
I imagine only a few per/sec will be fine

Joe
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