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
Toggle Flip-flop - The T-type Flip-flop
Flip-flop (electronics) - Wikipedia
flipflop - Why use JK Flip Flops in syncronous/asyncronous binary counters rather than D flip flops? - Electrical Engineering Stack Exchange
Lessons In Electric Circuits -- Volume IV (Digital) - Chapter 11
Flip-flop (electronics) - Wikipedia
We need to design a four-bit binary synchronous down counter using JK flip- flop. I'd appreciate it... - HomeworkLib
simulation - JK Flip-Flop Counter: How to reset a counter? - Electrical Engineering Stack Exchange
Conversion of J-K Flip-Flop into D Flip-Flop - GeeksforGeeks
Asynchronous Counter: Definition, Working, Truth Table & Design
555 7473 JK Flip-Flop 4-bit Asynchronous Up counter (MOD 16) | Tinkercad