AVR-Chat

> If a little compexity is acceptable, this could work.  You'd have to
> figure out exactly where to put the MOSFETS and how to drive their
> gates without getting back into the problem you're trying to get out of.


This is why people who do software only, have such a hard time with
microcontrollers.
For this business, you really need some software, and some hardware,
specifically ANALOG!