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Schematic - for a thumbwheel

Discussion in 'Electronic Components' started by jodleren, Mar 30, 2007.

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  1. jodleren

    jodleren Guest


    I have a schematic for something - including some thumbwheels, meaning
    those BCD coders, with 2 buttons... so you can count from 0 to 9, and
    have 4 outputs.... what is the symbol for that?

    And - if anyone can tell - what is a thumbwheel in Danish or Estonian?

  2. James Beck

    James Beck Guest

    I have my BCD switches layed out as 4 switches with a single common and
    1,2,4,8 as notations over the appropriate switch bat. All inside a
    single symbol outline.
    Hope you can visualize that.

  3. I'd just make a box with 5 pins named 1, 2, 4, 8, and C. If I was
    feeling artistic, I might try to draw something that looked like the
    face of the switch in the box.
    Peter Bennett, VE7CEI Vancouver BC, Canada
    peterbb4 (at)
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  4. jodleren

    jodleren Guest

    So did I. But the electricians didn't get it.

  5. jodleren

    jodleren Guest

    Well, yeah... I get it, but does the electric, who has to put this

    I think I still go for the box.... with C, 1, 2, 4 and 8. They can be

  6. Why encourage them to be stupid? If they can't get it from the obvious
    drawing of four switches in a box with a pair of plus/minus buttons on it
    and a standard acronym for Hexadecimal or Binary Coded Decimal, I doubt
    they could reliably comprehend the difference between an DPST and an DPDT
    switch, and they should give up their job for someone who can.

    Labelling the pins will be up to you, as the orientation will depend on the
    most convenient fit in your diagram.

    In the vague hope that someone will these symbols useful, I have them in
    vector form, in PDF files, so they can be scaled and printed accurately. (HEX Switch Symbol) (BCD Switch Symbol)
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