Just got bored a bit and I’ve made a clock out of 6 decade counters and 7segment encoders. I’m starting to realize, that how much simpler it is to program these simple things rather than design their hardware.
Update: Here’s clock V2.0. It is built entirely out of synchronous master-slave T flip-flops with synch’d clear. This way the circuit is much simpler. (And at least I finally know, how it works. :D)