многомилионен град Експерт определен jk flip flop counter постоянен защита регулиране
How to design a synchronous counter 4 bit using JK flip flop that can count up even numbers from 0 to 14, and count down odd numbers from 15 to 0 in 1 system - Quora
Design steps of 4-bit asynchronous up counter using J-K flip-flop
Synchronous counter
Synchronous Counter and the 4-bit Synchronous Counter
4-bit Binary Up Counter JK Flip-Flop - Multisim Live