At 21:03 26.05.1998 -0400, you wrote:
>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.

Hi,

I'm measuring voltages up to 5000V with a simple diff.amp and a PIC. Cheap,
reliable and LINEAR !

If you need some schematics, please let me know. But it is as simple as it
sounds.

So long

Thomas
=8-)
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