How to implement a 4-bit up counter using JK flip flops - Quora
The 4-bit series binary counter using JK-flip-flops. | Download Scientific Diagram
design a bidirectional (up/down) 3-bit synchronous | Chegg.com
Bidirectional Counter - Up Down Binary Counter
1. Design the 4-bit synchronous up/down counter with timing diagram, logic diagram and truth table.
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
Designing Synchronous Counters Using JK Flip Flops - YouTube