help!! d flip flops

Discussion in 'Homework Help' started by ernestpandada, Jan 5, 2015.

  1. ernestpandada

    Thread Starter New Member

    Jan 5, 2015
    2
    0
    hi!
    i need to make a counter that counts from 00~59. then it will go back to 00 and start counting again. on top of that, there's a start/stop and reset button. when the start/stop button is pressed it will start or stop. however, if the restart button is pressed it will go to 00 and start counting! i cant seem to think of any ideas.
    im only given:
    x1 LS7474
    x1 LS7432
    x1 LS 7400
    x2 LS 7493
    x1 LS 74112
    not all the ics have to be used.
    PLEASE HELP ME ASAP!!!!
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    Have you studied state machines, Mealy, Moore, state-transition diagrams, present-state, next-state?
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,414
    3,353
    We don't do your homework for you. Show us what you have come up with so far.
     
  4. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,788
    Break the problem down into smaller problems. You might start with a counter that counts from 0 to 5 and then starts back at 0 again. Get that designed and tested. Then add in the ability to pause it using a single start/stop push button. Then add in the ability to force it back to zero. Then extend it from 0-5 to 00-59. Or do these things in a different order as makes sense to you.

    But in any event YOU need to show YOUR best attempt to solve YOUR homework.
     
  5. ernestpandada

    Thread Starter New Member

    Jan 5, 2015
    2
    0
    this is what i came up but i dont have some ics
     
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