On 3/4/08, Michael Cunningham <michael.cunningham.usa@gmail.com> wrote:
> I am rather new to PIC development but I am learning fast. I would like to
> build a circuit to measure the amount of AC current in AMPs flowing through
> a wire. Any suggestions on how to measure the current without directly
> connecting to the wire which will be carrying up to 125vac @ 30 amps.
>
> Can the PIC ADC be used for this purpose? Eventually I would like to drive an
> LCD with the value in amps.
>
> Any suggestions on where to begin?

See what error do you want for this measurement. The hall effect
sensors are good as "indicators" and not for precise measurements over
the full temperature range. If 5% is ok for you (1.5A error at full
scale), go with hall, but if you need a more accurate measurements go
with precision transformers.

Vasile
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