I need to condense my 2 3-8 decoders, but i cannot figure out why.

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

  1. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
  2. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
    I am also at the final part, i need to condense my 2 3-8 decoders but i cannot figure out why. My circuits look the same as Jessy1221
     
  3. dl324

    AAC Fanatic!

    Mar 30, 2015
    8,521
    2,049
    What school are you guys attending? Going from 3 inputs to 8 makes the problem more difficult (IMO).

    Using the gear inputs more directly makes more sense. You can't use a standard logic block to do it, but it can be implemented with AND, OR, and NOT gates.
     
  4. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
    Griffith Uni.
    Unfortunately, this is what they want. So what would be the easiest way to go from the 2 3-8 decoders (16 outputs) and condense it into 1 led only using AND, OR and NOT gates?
     
  5. dl324

    AAC Fanatic!

    Mar 30, 2015
    8,521
    2,049
    This is homework, so we can only give guidance.

    How would you solve any other combinational logic problem that had 6 inputs and 1 output?

    EDIT: And a belated Welcome to AAC!
     
    Last edited: May 16, 2018
  6. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
    MMm, I cant seem to figure it out.
     
  7. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
    My difficulty is within this last section, I dont know how to connect the last part.
     
  8. dl324

    AAC Fanatic!

    Mar 30, 2015
    8,521
    2,049
    I don't think you're wiring the thing you're calling a selector correctly.

    Can you post your lecture notes that covered doing something similar?

    I can make the "selector thing" work, but it requires a brute force method for solving the problem.
     
    MARK.C likes this.
  9. MARK.C

    Thread Starter New Member

    May 16, 2018
    6
    0
    Thank you for the help, i figured it out :)
     
  10. dl324

    AAC Fanatic!

    Mar 30, 2015
    8,521
    2,049
    Didn't do much, but you're welcome anyway.
     
Loading...