How Flip Flops Work - The Learning Circuit

Which explanation do you like better? Let us know in the comments.

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[elephante]

Very useful video to watch when your professor hasn't been teaching that well during online school during the Quarantine.

[LeonardChurch]

Thank you for explaining in 9 minutes what it took my computer engineering professor a week and a half of barely comprehensible lectures to explain.

[eelcohaven]

I think you got the set and the reset of the sr flip flop with the 2 nor gates reversed, in this case Q can only be high if set is low and reset is high

[blackxprophet]

In case anybody got confused like me, for active high SR Latches, the S is on the BOTTOM with Q-Bar and R is on TOP with Q. This way the S sets Q to 1 when it's high and R sets Q to 0 when its high

[mikeduino]

Obviously she didn't actually check the logic in her diagram, the set and reset inputs are reversed. Also, you would pull them down with resistors, not attach directly to ground.

[cortlandtatt]

This is my first time hearing this. It's just to fast, but I like how you explain . Thank you.

[diegoochoa]

Why oh god WHY couldnt I find this video when you guys posted it and we were covering ff's. I looked through so many videos and so many read throughs that all seemed incomplete and made me more confused. Finally after blood sweat and tears I feel like a completely understand these but why couldn't I find this video when I needed it ;-;. Pls keep it up, your guy's videos are so incredibly helpful. Sadly better than my expensive textbook...

[jlamothe]

I think you've got Q and Q bar reversed on your SR flip-flop. Looking at the top NOR gate, if either of its inputs is high, the output will be low, meaning that if SET goes high, Q will go low.

Edit: it turns out the more common way is to switch RESET and SET, but the end result is the same.

[chrishadjipetris]

Jk flip flops are usually used for counters, either synchronous or asynchronous and D flip flops are usually used for fsm implementation. Also, if you connect j and k together, then it becomes a T flip flop

[peterpade]

Great stuff for my added learning for an old retired Aussie mechanical engineer

[phildodd]

This series is great because you're using visuals to such great effect ! So easy to see what you're explaining, because up until recent times, we had to memorise what was illustrated in voluminous text books ! And you're explaining it so clearly to us ! This series is so useful because we can bookmark it and return as often as we need to for a refresher ! An Arduino makes things too easy; in a way it is a sledge-hammer to crack a nut, whereas we can ( and did ) use a flip flop to do the same job much more simply. As I said in another comment. this was the way that computers were built - they lived in air-conditioned rooms the size of Walmart, with hundreds of flip-flop boards each using 3 transistors. Because computers can't stop if they're multi-programming, the data has to keep cycling round until it is needed, which it did in these rings of flip flops ! Things began to change in the mid 1970s, when integrated circuits took over from discrete transistors for flip flops, and the shrinkage in hardware size began to take off. IT's great that you're covering all of this in this series - thanks !

[Jose_T]

One of the best examples with animations. Not to bashed hindi content but this is more undertandable

[mughatoamugha]

Mam thanks a lot for the wonderful amazing video.
By the way I wanted to add some correction At 5:27 minute of your video there is an error of AND gate image. You have added the inverter sign on the diagram. Since there won't be any inverted or bubble sign on the AND gate.
Thanks

[Gliesecc]

Your teaching is easy to understand... Thanks dear! Who is speaking here, Marcos from Brazil!

[Iamhuman]

preset and clear signal are useful when multiple flipflops are used

[DiffEQ]

The diagram for the NOR gate RS flip flop is incorrect. The SET input is on the NOR with Q-NOT output and the RESET is on the NOR with Q output. There is no way for Q to be HIGH ( 3:10) with either of the inputs to that NOR gate also being HIGH.
This video has been out for nearly three years and no one has noticed this?

[TizedesCsaba]

Hmm..., from 3:00 when said the inputs are connected to the Ground then discussed these inputs set to High is totally confusing. How something changed if that connected to the Ground? If something connected to the Ground that signal is always Low or I missed something? English is not my native, so maybe this is the root of the problem...

[cmprodutions]

I am condused. At 2:37 you say that NOR gates are only 1 if both inputs are 0. But then at 3:06 you say that setting the input to the SR flip flop causes the top NOR gate (input now 1, 0) to have an output of 1.

[jamesvitello]

Very nice instruction but I am confused. How is it possible that the flip flop examples (time 2:42) show both gates with set and reset inputs connected together denoted as ground, and that independently each input is said to be at different states, either high while the other is low or vise a versa?

[tanveerahmad]

best video found ever about electronics