Thanks Bob,
This is actually what I have now however it reduces the resolution of my=20
system from 1024 values  to 1024/(deadband+1) . I was hoping to avoid=20
the drop in resolution. I am building a light dimmer so I want as=20
gradual a curve as possible when I am moving the POT to control the output.
Jim
> #define DEADBAND 1
>
> if ((oldval + DEADBAND) > newval)
>      updateVal(newval);
> if ((oldval - DEADBAND) < newval)
>      updateVal(newval;
>
> Don't worry about rollover/under, as long as all values are unsigned.
>
> Still dithering? Increase DEADBAND to 2.
>
> Cheers, Bob
>
> On Thu, Nov 26, 2015, at 08:28 PM, Jim Ruxton wrote:
>> Thanks everyone for the suggestions. I don't think in my case it is
>> really a filtering issue because for example if my POT is set close or
>> on the edge of an A/D transition I believe I will still see a bit
>> flipping occasionally in the LSB if I have lots of filtering. Not sure
>> if I am being clear but I really only want to have the reading change my
>> output if I am moving the POT so thought there would be a clever way to
>> detect that and only update my output if the input is varying
>> substantially.  Perhaps to really get the best results I need a
>> multiturn POT or move to a digital encoder.
>> Thanks,
>> Jim

--=20
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