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Need Solution for Peculiar Ring/Pointer Problem

Discussion in 'General Electronics' started by Maddy, May 24, 2004.

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  1. Maddy

    Maddy Guest

    JeffM, Robert, Joseph
    Thanx a lot for the suggestions.
    Actually, I am a total technical nincompoop. So would be really great
    if i could get a more specific solution.
    Let me give some more details of my system to clarify. The ring is
    around 1 inch thick(in breadth). It has some other contraptions on
    both sides(concentric rings) which will not allow anything to be
    added. The pointer is made of plastic and cannot take anything heavy.
    So I probably need some kind of strip which can be stuck onto the ring
    (cannot wrap around it as it is flush with the mounting) and the
    sensor would have to be light and small. And then of course..(uh oh)..
    I want it cheap. I dont know if such a thing is possible or even
    exists but would really really appreciate a few more pointers.
  2. Robert Baer

    Robert Baer Guest

    An optical encoder disk sounds like a possible add-on solution.
    It can be a thin film, black and white reflective.
    Maybe "stolen" from an optical encoder, and perhaps the rest of the
    encoder used at the "pointer" location?
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