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  1. #1
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    7 segment display wiring

    Hello,

    I had a thought that to reduce wiring I could connect all pins except the cathode pin and the pin for the centre horizontal bar (minus sign) together when I need a zero.

    Does anyone know if this is okay to do? I plan to connect to OC display cards and am using Prosim.

    Thanks for any advice.

    My regards

    Dave

  2. #2
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    Re: 7 segment display wiring

    Dave,

    Paralleling segments in that manner is generally not a good idea. The individual LEDs are not quite identical and the current will not be divided equally, so the segments will not appear equally bright. In a worse case, one LED might hog enough current to become damaged.

    It's best to provide each segment with a current limiting resistor.

  3. #3
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    Re: 7 segment display wiring

    Hi Mike,

    Thanks for the reply, much appreciated.

    I think I'll just wire all segments back to the display cards, at least that way I'll avoid the problems you highlight for the sake of a bit more cable.

    My regards

    Dave