Flip Flo JK

[robertbabe2006]

Hello Im trying to do a Digital Watch with JK Flip Flop. it has to go from 0-59.

This is what I have so far the First one works and counts 0-5 but I dont know how to do the rest?

Please help thank you

 

[philba]

is there a specific reason why you are using FFs for this? You could use a 4-bit counter for each digit. AND the right combination of bits and feed into the resets to get the roll over from 59 to 0 (or 23 to 0 or 12 to 1 ) as well as increment the next segment (roll over seconds, increment minutes and so on).

If you have to use FFs, look at the datasheet for a BCD counter and emulate the logic there. The cd4518 is a pretty simple one. https://www.electro-tech-online.com/custompdfs/2006/05/cd4518b.pdf

Of course, the best way to do this is to use a microcontroller. the uC and some drivers are all that's needed,

 

[robertbabe2006]

Flip Flop Jk

Thanks for you response. the reason Im doing with this is because I was asked to do it with Flip Flop JK. As you see in the design the way it is the first segment goes from 0-5, but what I wan to do is that the seconde segment could go from 0-9 an after that increment the first segment in one. So it woul stop in 59. 0-59

 

[philba]

Thanks for you response. the reason Im doing with this is because I was asked to do it with Flip Flop JK. As you see in the design the way it is the first segment goes from 0-5, but what I wan to do is that the seconde segment could go from 0-9 an after that increment the first segment in one. So it woul stop in 59. 0-59

Oh, so its for a class. like I said, look at the counter's datasheet. if you can't figure it from there, well...