Alright, a few months ago I needed help on a count down timer I was working on for 4 digits, and got it working perfectly. Well, now I need to reduce that to two digits, and I really have no clue to reduce this circuit down. I tried a few things on breadboard, but couldn't get it working at all. I just need to remove the seconds digits. I know I could just not connect those two 7-segs, but there's still the 2 74HC192's that are there.
Also, if possible, can it be setup to stop at 00? Right now it stops once it hits 00, but it flips back to the pre-set number. I need it to display 00 until the circuit is reset.
I'd appreciate a quite response if it wouldn't be too much trouble, this is fairly important.
ORIGINAL:
**broken link removed**