4 counting 7 segment

Discussion in 'General Electronics Chat' started by stevevhan, Aug 29, 2010.

  1. stevevhan

    Thread Starter New Member

    Aug 29, 2010
    Hi everyone, this is my first time to post here. I want help really,. We have a project that requires us to use sensor, but my problem is how to stop the count of 7 segment at count 4 using NOT, AND and OR gate. Please help! Thanks.


    Jul 13, 2010
    hello stevevhan,

    you may suppose to count from 0 to 4 and then no change after that ..

    first invert pin 4,6,9 @ 10 using "NOT"
    then "OR " them all
    o/p of "OR" is "AND" with senser i/p
    and o/p of "AND" will be ur input to counter..

    so by using this your conter will be 0,1,2,3,4 and after that it'll stuck to it..

    but this's like arrow in the air,if you put ur proj schematic then it'll be more easy to ans...
    stevevhan likes this.
  3. stevevhan

    Thread Starter New Member

    Aug 29, 2010
    Thanks for the reply AMIT_GOHEL:):). That's exactly what we need, 0-4 but we are using the 74ls190 counter, how am i gonna connect it?or reset it to 4?:(. I will also try what you gave!