> I have 10uf and 0.1uf in parallel at the regulator but not at both the SX
> and the ISD2560. I'll try that as well as the resistor tonite. The
> oscillations happen becuase I am reading the pots at a pretty high frequency
> and each time the pot is read the pin goes from high to low in a nice curve
> because the cap is discharging. I'm not sure if changing the pin from input
> to output is helping either.
>
The resistance of the pots/source is too high for the a/d
input.
The best way is really to buffer the analog with an opamp
where the output goes to the A/D and wires back to the
inverting input.

If this is not an option try a lower value pot and/or a cap
on the wiper to A/D wire, say 100nF. This may help stop
the sagging/oscillations but could be a problem if this pin
is shared with an output.

I have sometimes used 1uF caps to stop sag from a
relatively high impedence, very application dependent
though.

_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

www.psych.auckland.ac.nz

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