Design a counter using JK flip flops

Discussion in 'Homework Help' started by slider203, Jan 18, 2010.

  1. slider203

    slider203 Thread Starter New Member

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    Hello I am doing the grade 11 computer engeneering course and I was doing my homework when I got stuck on a question that says "Design a counter using J-K flip flops that will count in the following sequence: 0,2,5,1,3" would some one please help a newbie like my self make this counter. I have been trying for hours and still dont know how to do it.
    Thanks any help is apperciated

    EDIT: beenthere first we have to create a truth table (I did that)

    t t+1
    Q2 Q1 Q0 Q2 Q1 Q0
    0 0 0 0 1 0
    0 1 0 1 0 1
    1 0 1 0 0 1
    0 0 1 0 1 1
    1 1 1 0 0 0

    then we had 2 draw truth tables did that too.
    but then we have to make the truth tables into a diagram thats were Im getting stuck...this is what the diagram looks like:
    ____________ __________ ___________
    |J2 Q2 | |J1 Q1| |J0 Q0|
    | | | | | |
    O>CLK | O>CLK | O>CLK |
    | _ | | _ | | _ |
    | K2 Q2| |K1 Q1 | |K0 Q0 |
    --------------- ------------- -------------
    (I know its a bit rough but you get the idea..I hope)
    Last edited: Jan 19, 2010
  2. beenthere

    beenthere Retired Moderator

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    Can you show us your work? We may be able to see where you got stuck.
  3. t06afre

    t06afre AAC Fanatic!

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    try Google and the term karnaugh synchronus counter. This should get you started
  4. knowitall

    knowitall New Member

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    Are you allowed to use any additional componants, like diodes or decoders,or a reset switch?
  5. slider203

    slider203 Thread Starter New Member

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    we can use a reset switch also we are using the chips 7490, 7992, 7493
  6. beenthere

    beenthere Retired Moderator

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    Get the data sheets for those chips - you might be surprised to see what they are. Google "sn7490", sn7492, sn7493" and follow the links for the data sheets.
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