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
Bidirectional Counter - Up Down Binary Counter
verilog - 8 bit counter from T Flip Flops - Electrical Engineering Stack Exchange
Ripple Counter - Circuit Diagram, Timing Diagram, and Applications
Solved 1a) (2 pts) A 8 bit ripple counter has a 2.56 Khz | Chegg.com
Digital Circuits - Counters
2 bit up 4 bit counter with D flip flops - VHDL - Stack Overflow