Display trans shift position

Discussion in 'The Projects Forum' started by Orville, Nov 10, 2007.

  1. Orville

    Thread Starter New Member

    Nov 10, 2007
    4
    0
    Hello

    I have modified the shifter mechanism in a custom vehicle so that I can't
    use the stock shift position display.

    Would it be posible/practical to use a single character 16 segment or led
    matrix unit to display the characters 1,2,3,D,N,R,P from a signal given by
    a magnet activated reed switch for each position as the switch is closed
    by a magnet attached to the shift lever? What driver/controller might I use?

    Any comments and opinions will be appreciated.

    Orville
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    There are several inexpensive microprocessor chips that would do the trick for you.
     
  3. Orville

    Thread Starter New Member

    Nov 10, 2007
    4
    0
    thingmaker3

    Thanks for pointing me to the Picaxe microcontroller. It's a fascinating device
    and I think it will do what I want. In fact, I think I can drive a single character
    16 segment led display directly from the chip.

    I checked my Helm manual for the vehicle involved (2006 grand prix, engine
    and dash and wiring swapped to a '88 fiero) and found that the transmission
    provides the pcm with the shift position by means of 4 coded lines. By configuring
    the Picaxe 28X to have 4 i/p's and 16 o/p's, I can get the shift position by
    splicing from these coded lines to the Picaxe i/p's and then program the o/p's to
    activate the segments for each character I want to display.

    What do you think?

    Orville
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    I think you're ready to draw up a circuit.:)
     
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