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
A 4-bit synchronous counter using T flip-flops | Download Scientific Diagram
Design 2 bit Synchronous up counter using T Flip flop? | Digital Electronics | Programmerbay