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Digital car Compass hack

Discussion in 'Electronic Design' started by Heyme, Jul 13, 2005.

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  1. Heyme

    Heyme Guest

    Does anyone have any inforamtion on how a digital compass in the car works.
    I'm working on a project that I need to know direction. I was thinking of
    checking out a junkyard for a rearview mirror or overhead console that has
    a digital compass in it. How does the car interface to one of these?
     
  2. Ken Moffett

    Ken Moffett Guest

  3. Rich Webb

    Rich Webb Guest

    Probably an inexpensive fluxgate magnetometer. There's a good article
    about small project magnetic sensing at
    http://www.circuitcellar.com/library/print/0404/Miller165/index.htm.
    Google for fluxgate compass for specific info.
     
  4. Ken Smith

    Ken Smith Guest

    www.pnicorp.com are the folks that make them. They sell (sold) a PCB for
    about $200 that gave you the 3 axis of the magnetic field and tilt.

    The product contains software for correction for nearby magnetic objects.

    A while back Radio Shack had a 2 axis flux gate for about $20.

    Digikey carries GMR sensors that could be used to make a fairly basic
    compass.
     
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