I need to make a counter...PLEASE HELP!!!

Discussion in 'Homework Help' started by rkobasketball, Mar 20, 2010.

  1. rkobasketball

    Thread Starter New Member

    Mar 13, 2010
    5
    0
    I need to make a counter using either 74LS190 or 74LS191. It needs to count between 2 and 7, meaning from 2 up to 7 and then back down to 2. Ex: 2, 3, 4, 5, 6, 7, 6, 5, 4, 3, 2, 3......
    It has to be able to repeat this pattern 3 times and then stop.
    This is a classwork assignment that I have been stuck on for about 2 weeks now.
    Please help!!!!!!
    thanks,
    Julian
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    What have you tried?

    Show your schematics, and what results you were getting.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,176
    397
    Becides the 74LS191, are you allowed to use additional ICs?
     
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