Use the forward drop across a few diodes to drive an optoisolator.  Or
use a current transformer if the load is large or you want to measure
how large it is.

Sherpa Doug

> -----Original Message-----
> From: Frank Tarsitano [mailto:ftarsitano@YAHOO.CA]
> Sent: Tuesday, July 31, 2001 3:18 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [OT] current sensing circuit
>
>
> I'm looking for a circuit that will detect current
> flow. I want to know when a particular appliance is
> turned ON.
>
> If any one can help it would be greatly appreciated.
>
>
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