- #1
rasen58
- 71
- 2
I needed to make a ripple counter start from 3 and end at 17. I got it to reset to 0 when it reaches 17, but I can't get it to start from 3.
I am using 5 JK latches with LEDS attached to the outputs of each to represent each number.
To get it to stop at 17, I nanded the msb and lsb and connected it to the active low resets on the latches.
To start them at 3, I tried ORing the 3 msbs, and ORing the output of that to the 2 lsbs anded
3 = 00011, so if the msbs are all 0 and the 2 lsbs aren't 11, then it should output a 0. This works, but it also causes a problem, because now the reset is always low and it can never become a 1.
I am using 5 JK latches with LEDS attached to the outputs of each to represent each number.
To get it to stop at 17, I nanded the msb and lsb and connected it to the active low resets on the latches.
To start them at 3, I tried ORing the 3 msbs, and ORing the output of that to the 2 lsbs anded
3 = 00011, so if the msbs are all 0 and the 2 lsbs aren't 11, then it should output a 0. This works, but it also causes a problem, because now the reset is always low and it can never become a 1.