Alarm Contact

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  1. - 10th October 2005, 19:59 #1
    Pesticida's Avatar
    Pesticida
    Pesticida is offline Member
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    Default Alarm Contact

    Hi People I have a great Software and Hardware problem !
    I want to make one Alarm contact like in this photo:
    When I open the contact i need on the pic, state "Alarm",when i make a shortcircuit between the two wire i need the state "Sabotage".
    How can I do this ,I have tryed with Pot command but the entire system is too sensible.I dont know if I can connect like in the image direct to portA.
    I need the 10K Resistor while without resistor i have just one state ex. "Sabotage".
    In professional Alarm Ciruits they all use 10 K or 12 K Resistors.
    I need that the PIC recognize that a 10K resistor is on the portA.
    Please for help.
    Thanks !!!
    Bye Pesti
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