Possibly a bit more info would assist in suggesting an easy method.
AC or DC ?
110V/220V or 6/9/12V etc?
Low (<1A) or High >10A current?
Internal Equipment access available or need to sense from wiring?
Can cut into power cable or have to leave as-is?

Sorry if this sounds a bit negative but there are a lot of ways of doing
it.

Richard P




                    Frank
                    Tarsitano             To:     PICLIST@MITVMA.MIT.EDU
                    <ftarsitano@YA        cc:
                    HOO.CA>               Subject:     [EE] current sensing circuit
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                    02/08/01 07:47
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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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