Logic circuit counter, base 16 to base 10

Discussion in 'Homework Help' started by novop, Nov 17, 2010.

  1. novop

    Thread Starter New Member

    Sep 10, 2010
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    [​IMG]


    The problem: Design a counter using this chip which counts in base 10 rather than 16. The count should reset at 10, never displaying A on the output chip.



    To be honest I'm a bit lost. I was thinking maybe I could maybe use the RESET pin on the chip, or reload it with 0 at the loading pin when the count hits a particular value. Am I on the right track? Please help this is due tomorrow ^.^
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Logisim is handy for testing ideas.
     
  3. novop

    Thread Starter New Member

    Sep 10, 2010
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    I don't really have any ideas yet!
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    How does 9 in hex differ from 15? Would the states of Qa - Qc be different?
     
    Last edited: Nov 17, 2010
  5. novop

    Thread Starter New Member

    Sep 10, 2010
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    Sorry I'm not quite sure what "hex" is. Did you mean something like 9 is 1001 and 15 is 1111 ?
     
  6. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Hexadecimal or hex is base 16.

    What are the states of the 4 bits that are not allowed for it to be base 10, or Binary Coded Decimal?
     
  7. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    Start with a truth table.
     
  8. Georacer

    Moderator

    Nov 25, 2009
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    You are going to the right direction with the RESET pin. What needs to be the activation condition of the RESET pin?
     
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