Digital Circuits Lecture-55&56: Asynchronous Counters- Part 1

In this lecture, i discussed about the asynchronous or ripple counters.
 i.e  1. How a JK FF go through some sequence when we applied a clock.
      2. 2-bit up counter using negative edge triggered JK - FF
      3. 2-bit up counter using negative edge triggered T - FF
      4. 2-bit up counter using positive edge triggered T - FF
      5.  2-bit down counter using positive edge triggered JK - FF

For Video Lecture follow the below link:  
https://youtu.be/UCWIfkxeSHQ

For Lecture Material download from follow the below link:
http://www.mediafire.com/file/smd8yg2xfqk4rpe/DE-Lec-55%2656.pdf