Detecting AC current


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  1. #3
    Join Date
    May 2004
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    The simple Way : use three power Si diodes in series with the line to create a voltage loss. Three other diodes anti-paralled will allow full wave transmission.
    Or two diodes and a small value resistor, if there's an offset.

    Then use this loss to power on the led of an opto-coupler ...an have the looked-for info from the opto's transistor.

    plus a free zero voltage detector for synchro-switching !!!

    so simple ...

    Have a look to slave supplies sold for powering computer accessoiries ...

    Alain
    Last edited by Acetronics2; - 29th June 2005 at 10:01.

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