Michael Watterson wrote:
> Why complicate with opto isolator when you don't need one.

You are missing the point.  I wasn't saying it was necessarily better to run
the PIC at -5V to 0V, or -50V to -45V, or something else, only that it was
possible.  It might be reasonable in this design to do so, or maybe not.
That depends on what the external world interface requirements are, which I
don't think we know.  It may also be quite possible that isolation is
required anyway, in which case there is no additional cost due to the opto.

> Any how you love to prove you are smarter, but obviously I was
> referring to VDD vs Vss.

That was not obvious, and certainly not what you said.

> You might be the most expert person on this list, but you are also the
> most pedantic and rude one.

Attention to detail is important.  There can be 2000 people reading a
message, with many of them not able to tell the good from the bad.  I make
no apologies for pointing out incorrect or ambiguous statements.  If you
don't like that happening to your statements, be more correct and less
ambiguous.


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