A Synchronous Counter Design Using D Flip-Flops and J-K Flip-Flops – K.L. Craft – Website and Blog
Digital Synchronous Counter - Types, Working & Applications
What is the circuit diagram of a Mod-15 asynchronous down counter? - Quora
Q. 6.28: Design a counter with the following repeated binary sequence 0, 1, 2, 4, 6 Use D flip-flops - YouTube
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