AVR-Chat

>   Your only delay now is how long it takes to charge that
>> cap through the resistor network - but since this is a slowly changing
>> signal (one hopes!) that shouldn't matter.
>
>
> The source resistance still matters, because the AVR inputs have
> leakage currents into or out of the pins. If the source resistance is
> large relative to that current, then the voltage on the cap will be
> affercted, or dominated, by that leakage current.
>
> Check the specs, and design to survive the maximum specified leakage.

Good point, I didn't consider that leakage.

Its never just a simple answer is it?

I'm still curious enough to experiment with this idea compared to my
typical OpAmp solution.

DLC
--
Dennis Clark