MOD 8 synchronous counter with JK Flip Flop|MOD 8 synchronous counter with T Flip Flop|3 bit counter - YouTube
Design: a mod-8 Counter
Mod 8 Synchronous Counter using JK Flip-Flop - Multisim Live
COUNTERS
The Design of the Moebius Mod-6 Counter Using Electronic Workbench Software
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