7 segment display

Discussion in 'Homework Help' started by Pleasehelpme, Aug 18, 2012.

  1. Pleasehelpme

    Thread Starter New Member

    Aug 18, 2012
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    How do i create the truth table for a 7 segment display that displays letters D, H ,K, N using a toggle flip flop?
     
    Last edited: Aug 18, 2012
  2. absf

    Senior Member

    Dec 29, 2010
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    How does the letter "K" look like on 7 segment LED?

    Allen
     
  3. Pleasehelpme

    Thread Starter New Member

    Aug 18, 2012
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    When F,E,D,G are lighted up
     
  4. absf

    Senior Member

    Dec 29, 2010
    1,493
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    The truth table looks something like the attached picture.

    In the table, segments 'e' and 'g' are permanent High and segment 'a' is permanent Low. You only need to deal with segments 'b, c, d & f ' . Would that simplify your task?

    Allen
     
  5. WBahn

    Moderator

    Mar 31, 2012
    17,777
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    How are the letters coded?

    I don't understand what you need the flip flop for.

    Are you trying to make a state machine that cycles through those letters?
     
  6. absf

    Senior Member

    Dec 29, 2010
    1,493
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    Last edited: Aug 19, 2012
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