Forum Discussion

Fall3n's avatar
Fall3n
Icon for New Contributor rankNew Contributor
2 years ago
Solved

Running into an issue with a minute/second countdown timer

I would like to start by saying I know this is Quartus 2 not Prime because my college uses 2. I did not see a form for 2 but need some help. we are basically restricted to using 74192 for the countdo...
  • FvM's avatar
    FvM
    2 years ago
    Setting to 5 requires a respective value at inputs A - D. You need additional logic to implement down-counting 0 to 5 and up-counting 5 to 0.
Fall3n's avatar
Fall3n
Icon for New Contributor rankNew Contributor
2 years ago
It is a restriction for our final project. This class is an introductory Logic and Digital Design course so we have only gone over basic logic gates, adders, and down/up timers, thus the restriction to the 74192.

In relation to the set 5 how would you recommend this?
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
2 years ago
Setting to 5 requires a respective value at inputs A - D. You need additional logic to implement down-counting 0 to 5 and up-counting 5 to 0.
  • Fall3n's avatar
    Fall3n
    Icon for New Contributor rankNew Contributor
    2 years ago
    This worked. Set A and C high. I had them set low and forgot to invert my signal reading the 9 reset.