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Make a 74LS193 Synchronous Down Counter Stop at Zero

blond3d

Apr 3, 2024
1
Joined
Apr 3, 2024
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Hi, I have created a circuit on multisim live and it counts down from ten to zero, but I can't figure out how to make it stop counting at zero. I think it something with the borrow pin, but I don't know what. Please help Screenshot 2024-04-02 at 6.24.28 PM.png
 

danadak

Feb 19, 2021
767
Joined
Feb 19, 2021
Messages
767
Right now you have a divider, so it runs continuously.

One way is to detect 0, the falling edge of the borrow output use that to
stop clock or clk a D to force the counter to hold its CLR input active.
And use the load signal to clear that D.....and restart counter.


Regards, Dana.
 
Last edited:

danadak

Feb 19, 2021
767
Joined
Feb 19, 2021
Messages
767
Take a look at this thread on topic of asynch clear and load related issues :



Regards, Dana.
 
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