I need to measure a voltage 3-30VDC using a PIC, but the PIC has a totally
different ground reference than the voltage I'm supposed to be measuring
(the two circuits _are_ connected, but I have no way of knowing how because
each install will probably be different).

I was thinking that this is an ideal situation for using an opto-isolator,
and was wondering if anybody knew in a practical way if this would provide
reasonable accuracy with varied temps, etc.

Anybody have any other suggestions?

Thanks!

Andy

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                     Andy Kunz - Montana Design
          Go fast, turn right, and keep the wet side down!
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