Info wrote:
>>> 5 kohm, but I had to put a 12kohm resistor in series to
>>> do a voltage divide to get it down from 0-24v to 0-10v.
>
>> So you aren't keeping the wiper unloaded as I explained in a earlier
>> post. What you are doing is just asking for a scratchy signal.
>
> Its pretty much unloaded. The wiper sees a 100k ohm load from the A/D
> with a 1uF cap in parallel to 0v to supress the noise.
> 24v --- 12k resistor ---- linear pot --- 0v

Ah, the 12Kohm resistor is in series with the *input* of the pot, not the
wiper.  Have you tried what I suggested in my first reply?


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