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
Asynchronous Counter
Solved Referring to the a 3-bit asynchronous up-counter in | Chegg.com
Synchronous Counter: Definition, Working, Truth Table & Design
Ripple Counter - Circuit Diagram, Timing Diagram, and Applications
Solved 1a) (2 pts) A 8 bit ripple counter has a 2.56 Khz | Chegg.com
Logic Circuitry Part 4 (PIC Microcontroller)
digital logic - D flip-flops, but no feedback loops: impossible? - Electrical Engineering Stack Exchange