Counter Clock Cycle: Ask for Help Here

[cupcake]

Hello, I want to ask, I have a counter 74193 or 74191, and I want to make it counts 3 clock cycles.. any ideas how to do? we suppose to use timer 555 right?

 

[Bob S]

I presume you mean that you want to (wanna) divide by 3, or count down from 3 to 0? Using the 74193, use the BO-bar output to preload a 3 (=2+1) into the register and count down to 0. The BO-bar carry will load a 3 into the counter.

Bob S

 

[cupcake]

I want it to count up, (or count down) as long as it counts three clock cycles, for example 0,1,2 (then reset) or, 2,1,0. but, I'm not very sure how to do..

 

[Bob S]

Also look at thread https://www.physicsforums.com/showthread.php?t=437709

If you want the circuit to count down to zero from a preloaded value and stop (and not count down again), then do not use the carry signal to reload.

Bob S

 

[cupcake]

actually I want the counter to count three clock cycles, start from 00,01,10 and then stop and reset everything again.. I have drawn the schematic but not very sure...is this the correct way to implement the counter?