A completely original (4-bit) counter I made.
A Synchronous Up Counter MOD-14 with Negative Edge Triggered used JK Flip Flop.
4-bit simple counter based on JK-flip-flop
Just a little basic computer based on the way Nandgame does it. (nandgame.com)
I've yet to try to add text-based coding, although that's a thing I really want to add
Enjoy!! The computer is in Microcontroller