optocoupler with seperated primary/secondary

Discussion in 'The Projects Forum' started by Orville, Dec 6, 2007.

  1. Orville

    Thread Starter New Member

    Nov 10, 2007
    4
    0
    Hello, I'm wanting to detect the position of an automatic transmission shift lever to activate a 16 segment single character display. An array of reed switches would serve, but I'm wondering if this could also be done using an opto device with separated primary and secondary, the led to be attached to the shift lever. Is there something available that I might use?

    Orville
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You would probably run into ambient light problems or dirt crudding up the transmitter or receiver. Magnets and reed relays are probably more suited for the application. The magnet will not need wires led to it for power, either.
     
  3. Orville

    Thread Starter New Member

    Nov 10, 2007
    4
    0
    Good points, thanks.

    Orville
     
  4. cumesoftware

    Senior Member

    Apr 27, 2007
    1,330
    10
    I'm confused. Optocouplers have primaries and secondaries?
     
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