door bell , detect activation

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  1. - 31st January 2008, 20:21 #4
    Luciano's Avatar
    Luciano
    Luciano is offline Senior Member
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    Hi,

    Try that.


    (Click to enlarge the picture)

    Optocoupler Datasheet:
    http://www.vishay.com/docs/83675/sfh620.pdf

    Best regards,

    Luciano
    Last edited by Luciano; - 31st January 2008 at 20:24.
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