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"Rheo-Switch" Question

Discussion in 'Electronic Basics' started by Baronvonrex420, Jul 28, 2003.

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  1. I am in need of a low cost 10 position switch but I need to keep the cost below
    the $30 each USD cost cause this project requires 3 switches.

    Can I use discreet components to make a 10 position switch using a rheostat?

    When the resistance level reaches a point, the next one triggers to make.
    Bounce or shorting is not a problem but I need one to make and the previous to
    quit times 10.

    Any help would be appreciated and any other lowcost, "basic" ideas would be

    Voltage is 12 VDC and current is low, say 200 ma.
  2. It depends on your application, but you could use dip switches, which are
    cheap, and a demux chip. Put a sticker near the switches 'reminding' the
    user of binary notation. Certainly easier than using a rheostat, which would
    be easy to bump and move inadvertently.

  3. Rich Grise

    Rich Grise Guest

    I've seen modular rotary switches where you buy the shaft,
    the wafers, and the necessary spacers in a sort of kit form,
    so you can stack them up and get as many poles as you want.
    And I've seen a couple of different techniques for limiting
    the number of positions. But I don't think they're of the same
    order of magnitude price-wise as $1.75. )-;

    Good Luck!
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