Help on 2 digit up down counter

Discussion in 'The Projects Forum' started by amaynew, Sep 19, 2007.

  1. amaynew

    Thread Starter Member

    Jul 9, 2007
    Hello guys, its me again. I'm having problems with my project on a 2 digit up down counter. . . its supposed to count from 0 -99 or from 99-0. I already have an idea on what to do with it by using JK flip flops but the problem is, i dont understand how to fulfill the last parameter given by our teacher.

    Our teacher said in her instruction that the Circuit that we will make must be programmable so that the user can set the base and the starting # for the up count and the down count. . .

    any suggestion on how to do the last parameter would definitely help me.

  2. Papabravo


    Feb 24, 2006
  3. amaynew

    Thread Starter Member

    Jul 9, 2007
    I already solved the problem of up/down count and i could program it to start at a certain number. but the problem is when it reaches 99 it goes back to zero and counts up again. . hmm is that parameter right?? i mean i think it should stop at 99 i guess. or does it really go back to zero because i think it must not.:(
  4. Eduard Munteanu

    Active Member

    Sep 1, 2007
    My guess is that the counters (I presume there are 2 of them) go over 99 and you see the trailing zeros coming from number 100.
  5. techroomt

    Senior Member

    May 19, 2004
    you can install a "stop count" feature with gates that will inhibit any additional clocks after the count is met.