4 bit jk counter only odd numbers

Discussion in 'Homework Help' started by OMMad, Nov 14, 2010.

  1. OMMad

    Thread Starter New Member

    Nov 14, 2010
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    assignment: design a counter through all the odd numbers from 0 - 15.

    progress: i think i have everything correct.

    can someone verify for me? i'd appreciate if you could point out any mistakes.

    i've attached what i have so far. thanks in advance for any help.
     
    choijo and Nupur like this.
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Did you notice that Q1, Q2, and Q3 are a standard binary counter, and Q0 is always =1?
    It seems to me that you only need 3 FFs.
     
  3. Georacer

    Moderator

    Nov 25, 2009
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    Or, if you have the option, use a standard counter IC. Take the 3 MSBs and use a HIGH pin to generate the LSB.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I was hoping he would figure that out from my post.
     
  5. Georacer

    Moderator

    Nov 25, 2009
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    To be honest, I didn't think of an IC counter when I read your post, but of a discrete Flip Flop counter.
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Yeah, I didn't read your post carefully enough. I was in fact thinking he could design a 3 bit counter from "scratch", scratch being JKs and maybe some gates. I didn't consider that he could use an IC binary counter, and, seeing that it was homework, I'd be willing to bet that I'm right about that.;)
     
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