JK flip flop 4bit counter with adjustable reset.
Though not the most straightforward approach, this challenge of making it work with JK to reset was worth it.
If you click, it holds. Else it keeps going
Change the switches below to make the number in binary you want to reset. E.g. from top to bottom 1001 resets at 9, 1010 at 10, 1111 at 15 or F (which is the usual)
