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Need help with an anlog sensor

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  • Need help with an anlog sensor

    I have a FB4 connected to an oil pressure sender.

    The sender was three wires; 12V power, GRND and signal 0-5V

    I have connected power and ground to a power and ground not on the board.
    That leaves one wire only going to the brain's analog input signal.

    I'm not reading any values on the input.

    Do I need to connect the FB input ground to GRND?
    Can I connect the sensor GRND to the FB input?

  • #2
    check it first with a dmm to make sure your sender is outputing a voltage
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

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    • #3
      I have and it is. Reading was about 4.7V

      Comment


      • #4
        im not familiar with the fb, but arduinos normally need a common ground.
        New System in progress:
        M10k
        Phaze TD1500 ~> Dynaudio MD130
        Phaze TD1500 ~> Seas g18rnx/p
        Zapco Ref 500.1 ~ 12" tc-9
        Behringer DCX2496 ~ Envision Electronics psu
        Transflective Xenarc

        My Car Pc Install
        My Boat Pc worklog

        Comment


        • #5
          The FB and the sensor share the same ground (the car) but the input ground is not connected to anything.

          The easiest connection would be to connect the sensor ground to the FB input ground but as it is powered from 12V I'm reluctant to try that in case it fries something.

          Comment


          • #6
            check out this link:
            http://arduino.cc/forum/index.php/topic,12893.0.html

            looks like you may just need a zener diode
            New System in progress:
            M10k
            Phaze TD1500 ~> Dynaudio MD130
            Phaze TD1500 ~> Seas g18rnx/p
            Zapco Ref 500.1 ~ 12" tc-9
            Behringer DCX2496 ~ Envision Electronics psu
            Transflective Xenarc

            My Car Pc Install
            My Boat Pc worklog

            Comment

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