Synchronous Counters #3: Example 1: 4-bit Up-Counter

This is the third video in a series about Synchronous Counters & Sequential Circuits. It is an example that runs through how to build a 4-bit synchronous counter that counts from 0 to 15 using JK flip flops.
Please feel free to run through the example with us on paper! We encourage you to pause the video at anytime to first attempt a part before seeing how to work it out. Good luck!

[@sartonraymomd]

Thanks so much @James Trombadore. Your video helped me so much. My favorite part was when the way the K-Map is filled was explained. If have spent a lot of days trying to figure that out. I appreciated your work. Thank you.

[@curiousseal2678]

Thank you for such a thorough explanation

[@Leothelionnnn]

hey bro thanks for video and this video solved my whole confusion and saved my time and effort... Thank you once again....

[@jyotirmaybarman6448]

Thank you Sir.....It helped me a lot...

[@yamukpara]

İ like your technicks. My best teacher

[@aakash.s9762]

Thank you James you helped me in my xam😉

[@rewrose2838]

thank you for the explanation 😊

[@TheIceCraftWhysomad]

Thank you

[@nikitabudhe3472]

Thank you sir

[@alicicek7867]

hey bro, firstly thanks your video but i have a little bit problem how to build synchronous counter that 1-3-2-4-5-7-6-8-9-11-1-3-2-4-5-7-6....and i must use 1 for others?

[@jamesmtrombadore5826]

You just need to change the next state of each value in the counter to reflect what you counter will do. For your sequence have the next state (Qa+1,Qb+1,Qc+1,Qd+1) for 1 be 3 rather than 2. If you change the next states to resemble the counter you want to build and then apply the same method for building the J-K flip flop columbs you should come up with the correct logic for the counter you want.

[@jamesmtrombadore5826]

Also for numbers that are not in your squece (like 10, 12, 13, 14 or 15), simply have their next state be 1 so that if the counter every comes across those value at the beginning the counter will just jump to the beginning of the counter.

[@jamesmtrombadore5826]

Look at my video for an even-down-counter, it will better explain how to manage non sequential counting sequences ua-cam.com/video/BwNTwR1Xcd4/v-deo.html

[@ayakhateeb6399]

How can I do 4 bit up down counter using jk flip flip

[@vamsisyoutube928]

There is a mistake when present state is 0111 then next state is 1000 in this case both ja and ka will be one

[@kikezaharievski1217]

Thanks bro, it helped me a lot but the circuits in the program didn't worked for me, can you send me a copy pls?

[@lighthappy3467]

hello sir, it help me a lot but. How about when the 0-13 count only? Thank You

[@canfidaan]

you can use reset. when it is 13 then reset basically

[@PROTECHRAHUL]

Plz clear doubt how you just brighten your hands in seconds🤔

[@tirthadas5204]

Do u have 4bit D flip flop

[@taskinabdur-rahman3487]

whoah first he turned white, and then he turned black LOL