how to connect ac sensor to PIC ?

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  1. - 30th May 2008, 12:42 #1
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    Default how to connect ac sensor to PIC ?

    hi all,
    I need help how to interface an ac motion sensor to PIC, the ac motion sensor I have is consist of three wires two for power and the last for switching to phase power when motion detected .

    how I can detect this signal to PIC ?
  2. - 30th May 2008, 13:45 #2
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    Part number of the motion sensor?


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  3. - 30th May 2008, 17:15 #3
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    The easiest would be to use an optocoupler; you could drive the opto LED thru' a resistor connected to the switched output of the motion sensor, and the isolated output could then drive the PIC.

    Regards,

    Anand
  4. - 1st June 2008, 18:35 #4
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    thanks, if one have schematic show the connection for ac sensors with PIC
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