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  1. #1
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    0-9 2 forward 1 back counter design

    i need 0-2-1-3-2-4-3-5-4-6-5-7-6-8-7-9 JK FF truth table. Please help

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  2. #2
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    Re: 0-9 2 forward 1 back counter design

    Hi,

    Show what you have done so far.
    We are not here to solve homework.
    We are here to correct your solution.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



  3. #3
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    Re: 0-9 2 forward 1 back counter design

    My guess, the state space can be represented with 5 bits (4 bits for the decade counter, one up/down flag).

    Use pencil and paper, sketch the table.



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  4. #4
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    0-9 2 FORWARD 1 BACK design counter

    I'm tring do 2 forward 1 back counter. it is like 0-2-1-3-2-4-3-5...
    I think I make some mistakes and I get mistakes. Can you show me what I did wrong ? I have to design my project on Proteus.
    When I activate Proteus, I see 0-4-2-4 on the display.
    Here are some of the works I've done
    Click image for larger version. 

Name:	PROTEUS.png 
Views:	6 
Size:	76.3 KB 
ID:	157037Click image for larger version. 

Name:	TRUTH TABLE.png 
Views:	9 
Size:	56.5 KB 
ID:	157038



  5. #5
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    Re: 0-9 2 forward 1 back counter design

    The counter can't be implemented with only 4 FF, you need a 5th FF that stores an up/down flag. Count 2 is e.g. followed either by 1 or 4. It's impossible to derive the next state from only the counter state.



  6. #6
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    Re: 0-9 2 forward 1 back counter design

    Do you think mine's truth table is correct or im wrong way about t.b ?



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  7. #7
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    Re: 0-9 2 forward 1 back counter design

    The table isn't correct. It has wrong (e.g. 190, 191) and ambiguous (e.g. 192, 202) lines.



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