Digital Synchronous Counter - Types, Working & Applications
3 bit Synchronous Down Counter - GeeksforGeeks
Design 2 bit synchronous up down counter using T flip flop? | Programmerbay
Digital Asynchronous Counter (Ripple Counter) - Types & Application
Synchronous counter
digital logic - D flip-flops, but no feedback loops: impossible? - Electrical Engineering Stack Exchange
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
flipflop - Parallel binary counter using T flip-flops - Electrical Engineering Stack Exchange