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Thread: Tutorial - Air Ride Suspension

  1. #21
    Constant Bitrate KennyKen's Avatar
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    Hi All

    Can i just check my wiring here as im in the middle of setting this up. Does this look right:



    And is that the correct size resister for the 150psi Dakota unit?

    Thanks in advance
    Ken

  2. #22
    Fusion Brain Creator
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    resistor size doesn't really matter, as long as you use one around 100 ohms. you then use the voltage divider formula and resistance to PSI conversion posted above in MDX to get PSI

  3. #23
    Fusion Brain Creator
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    nick might make a function that does this automatically... would be pretty sweet.

  4. #24
    Fusion Brain Creator
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    like a curvefitting function

  5. #25
    Constant Bitrate KennyKen's Avatar
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    Are you talking about the
    airridepressuresensormodule.xml
    airridepressuresensormodule.designer
    files

    As far as i was aware they do the job of taking the input (voltage) and converting it to the Output (Psi).

    Is that not correct?

    Thanks
    Ken

  6. #26
    Fusion Brain Creator
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    those will work if Nick posts the resistor he used while building those files

  7. #27
    Fusion Brain Creator
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    nick confirmed: his code is based on a 100ohm resistor.

  8. #28
    Constant Bitrate KennyKen's Avatar
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    perfect. thanks for that

  9. #29
    Constant Bitrate KennyKen's Avatar
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    Hmm ive got this thing wired up like my diagram above and i am getting a reading of 452, surely on a 150psi unit that's not possible.

    edit
    This is the airridepressure function:

  10. #30
    Constant Bitrate KennyKen's Avatar
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    Ok im going back to basics here.

    Forget PSI for the moment, lets just work with voltage, if i open up the standard skin and plug in the sensor on its own with no resistor and no PSI converter i get 4.87 which is the volts obviously

    However if i then install the 100ohm resistor, that voltage should still change to a much lower figure surely, well this doesn't change at all which leads me to assume ive got something wired incorrectly.

    Is there anyone out there who has actually got a pressure sensor working on this FB board?

    Ive got it exactly wired as in my picture above, can anyone shed any light on the subject as ive hit a wall right now.

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