> Also, I took a look at the schematic. According to the above
> website, this module uses 0 - 10V, and I wanted to see how easily it
> could be adapted to the -5V/+5V that MOTM generally uses. It looks
> like all the op-amp outputs are wired as comparators (ie. with
> positive feedback). If that is a mistake, perhaps it should be
> corrected.
Orcad library op-amp symbols have the minus input on the bottom, and the positive input
on the top, don't ask me why. Don't assume op-amp symbols are always drawn with the
negative input on top, it has become conventional recently, but different schematic software
may not follow that convention, and there are no regulatory bodies.
If I had mirrored the symbols vertically, then the positive power terminal would be on the
bottom and negative power on the top, which is much more of a problem.