URGENT! UP and DOWN counter using 74LS192 and 7447

Discussion in 'Homework Help' started by aqcua, May 16, 2018.

  1. aqcua

    Thread Starter New Member

    May 16, 2018
    4
    0
    There are some instances that our circuit counted two times. for instace we pressed our button but it sometimes skip numbers, is there something im missing? btw i used push buttons that are NC for the counter and it is connected to the VCC(source).
     
  2. WBahn

    Moderator

    Mar 31, 2012
    22,333
    6,575
    What makes it urgent?

    I'm assuming this is some kind of group project that is due soon?

    Moved to Homework Help
     
  3. WBahn

    Moderator

    Mar 31, 2012
    22,333
    6,575
    Your problem is almost certainly a debouncing problem.

    When you press a mechanical switch, unless it is specifically designed to be bounce-free, it will usually act as though it was pressed and released many times.

    Look up switch debouncing. There are several ways to go about it.
     
  4. aqcua

    Thread Starter New Member

    May 16, 2018
    4
    0
    Okay thanks
     
  5. aqcua

    Thread Starter New Member

    May 16, 2018
    4
    0
    Okay thanks ill look into it
     
  6. dl324

    AAC Fanatic!

    Mar 30, 2015
    6,255
    1,386
    When discussing circuits, it's helpful to post well drawn schematics so we can see what you did, or didn't do, to address switch bounce.
     
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