Synchronous Up/Down counter (2-6)

Discussion in 'Homework Help' started by Shuck, Dec 14, 2017.

  1. Shuck

    Thread Starter New Member

    Dec 14, 2017
    1
    0
    Hi, I must design a synchronous up/down counter from 2 to 6.
    I've introduced a variable called M to change it from down to up. I've done the truth table, karnaugh maps and obtain truth functions, but I can't do it with all the IC's my college gave me.
    Am I wrong with something? I'm using 2 flipflop 7476, one 7404, two 7408 and two 7436.
    Thanku so much.
     
  2. dl324

    AAC Fanatic!

    Mar 30, 2015
    6,982
    1,611
    Welcome to AAC!

    Post your truth table and describe how the circuit isn't working.
     
  3. dl324

    AAC Fanatic!

    Mar 30, 2015
    6,982
    1,611
    You only posted half of the Kmaps and your handwriting is so sloppy that it's difficult to read. You started using Y to designate outputs, then you started using Q. You sometimes draw your 1's with a hat, and sometimes don't. Some of the boxes in the Kmaps are empty, but you use them in groupings. Sometimes you use 'X' for don't care, sometimes it's '-', and sometimes it's '*'.

    Your paper had grid lines; use them. Neatness counts in this field.

    Your schematic needs improvement too. I'm not even going to try reading it.
     
  4. WBahn

    Moderator

    Mar 31, 2012
    22,882
    6,838
    Don't make us figure out why your solution isn't meeting requirements. If you have limits on what gates you can use, tell us how your design violates it. Don't make us go through counting things or even looking up what those specific ICs contain.
     
  5. bertus

    Administrator

    Apr 5, 2008
    18,371
    3,520
    Hello,

    I tried to make the posted images a bit more readable with the GIMP:

    shuck_IMG-20171214-WA0001_corr.jpg
    shuck_IMG-20171214-WA0000_corr.jpg
    The images do not have enough information to make clearer images as these.

    Bertus
     
Loading...