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
@kylesmithiii61505 жыл бұрын
I think the same.
@dule781015 жыл бұрын
It's ok for the sake of explaining.
@banderfargoyl4 жыл бұрын
Yeah. It's confusing as hell.
@mohamedb7374 жыл бұрын
I spent an hour trying to figure it out.... why did she reverse them???? I lost precious time
@mumblic4 жыл бұрын
@@dule78101 For the sake of understanding, it's the most essential things. I have the feeling that for most people "understanding" is not really the reason why they watch this or other YT videos
@elephant35e4 жыл бұрын
Very useful video to watch when your professor hasn't been teaching that well during online school during the Quarantine.
@josephmartinez57703 жыл бұрын
Litterally y im here glad im not the only one lol
@nightnightyasmin3 жыл бұрын
This is why I'm here!
@rosspaterson74673 жыл бұрын
same
@MrNaufan2 жыл бұрын
can relate
@brokenandcraked Жыл бұрын
I'm in class and my professor refuses to teach lessons. He just shrugs and tells you to read the text book and figure it out. No one else is asking for help
@element14presents10 ай бұрын
Derek has this overview of Flip Flops and how they work: kzbin.info/www/bejne/iWObgnmbbKqXhKs
@blackxprophet34944 жыл бұрын
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
@babadmanz3 жыл бұрын
what does active high means?
@dynamic_pointer_cast3 жыл бұрын
Thanks, I was thinking that it should be NAND gates.
@thevoidzzz3 жыл бұрын
@@babadmanz It basically means that a device's output will change to high when the input to the device changes to high, active low is when the output of the device changes to high when the input changes to low
@dbf728292 жыл бұрын
@@thevoidzzz thanks
@dbf728292 жыл бұрын
Thanks
@mikeduino45962 жыл бұрын
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.
@nigelwang24472 жыл бұрын
Thank you, I was going around in circles trying to figure that out.
@Amittai_Aviram3 ай бұрын
Thank you! I was wondering about the ground connection, too - that made no sense.
@diegoochoa5724 жыл бұрын
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...
@manukadilum68143 жыл бұрын
blood sweat and tears dude stope being overly dramatic smh
@RaffieFaffie7 ай бұрын
@@manukadilum6814smh my head my head
@phildodd99425 жыл бұрын
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 !
@DiffEQ2 жыл бұрын
Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@chrishadjipetris60593 жыл бұрын
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
@jlamothe24 жыл бұрын
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.
@syedsaqlainahmad6372 жыл бұрын
i feel the same bro
@DiffEQ2 жыл бұрын
Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@peterpade62934 жыл бұрын
Great stuff for my added learning for an old retired Aussie mechanical engineer
@Stelios.Posantzis2 жыл бұрын
nope - it's got errors
@RaffieFaffie7 ай бұрын
@@Stelios.PosantzisWhat are the errors?
@Stelios.Posantzis7 ай бұрын
@@RaffieFaffieMost sources usually have ¬Q as the output of the NOR gate which has S as its input and Q as the output of the NOR gate which has R as its input. She's got it the other way around but she still continues the description of the circuit as if the inputs and outputs are named in the usual way (if you swap the outputs together with their values, they go back to being correct). Hence the values are all wrong. E.g. at 3:07, with S = 1 then Q must be 0 Same error at 4:44 with S = 1. again Q must be 0 in the circuit on the left (the one called "Active High").
@Gliese667cc60 Жыл бұрын
Your teaching is easy to understand... Thanks dear! Who is speaking here, Marcos from Brazil!
@tigermangoth62 жыл бұрын
Very excellent video. Very helpful and meticulous. Just what I needed. God bless you all at the Learning Circuit!
@TizedesCsaba2 жыл бұрын
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...
@reasonablebeing53925 жыл бұрын
Awesome tutorial. Some of your diagrams have inaccuracies but it is very obvious and does not detract from the verbal explanations. Would love to see a follow up episode with practical applications of flip flops. Counters coming up next?
@DiffEQ2 жыл бұрын
You say it's "awesome" but that it contains inaccuracies. So, which is it? Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@DiffEQ2 жыл бұрын
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?
@DotALotTroller Жыл бұрын
yes im pretty sure this is incorrect, the Q and Q-NOT should switch places
@Jose_T131 Жыл бұрын
One of the best examples with animations. Not to bashed hindi content but this is more undertandable
@QuantumVerse254 жыл бұрын
Through active flip-flop gate we can make a divce which can do two different works at a particular signal.
@andyjohnson44854 жыл бұрын
Just getting into electronics so bear with me here! Could you possibly include an everyday use of where these IC's are used, example, a flip flop could be used to toggle a chess clock, then give a quick dirty circuit that can be made at home? I ask this because I can watch videos all day long on what IC's are but I have no idea where to use then or how you would set up a circuit to create inputs for them. Any help in unlocking this magical box of mystery will be most appreciated!
@jancenj22184 жыл бұрын
I have to agree with you on this. People should be shown the application first.
@KermitCyrus2 жыл бұрын
SSDs and RAM use flip flops to store data. At 0:45 Karen states that flip flops and latches are sequential logic devices with built-in memory; combination logic devices don't have memory capabilities.
@syasyaputri1484 жыл бұрын
Thank you for this video! It helps my revision a lot. I have a questions for the SR Flip-Flop (Active Low). When drawing, do we need to connect SET' and RESET' to ground?
@skinnythanos68753 жыл бұрын
no, then the flip flop will be turned on, since in active low, gnd turns on the flip flop
@tanveerahmad84552 жыл бұрын
best video found ever about electronics
@polashdas69564 жыл бұрын
Thank you. I am from Bangladesh.
@Herooooooooo-m9i22 күн бұрын
preset and clear signal are useful when multiple flipflops are used
@Hardeepsingh-re8xn Жыл бұрын
Thanks for uploading this well explaining video. Very useful !!!!
@aaronaustrie3 жыл бұрын
Great explanation Miss!! Love it ❤❤ I've just subbed to your channel
@DiffEQ2 жыл бұрын
Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@สุกฤษฏิ์นิลพันธ์-ส7จ8 ай бұрын
This is very helpful since im just nine years old and im getting into circuitry in simulations
@cmprodutions Жыл бұрын
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.
@hyjinki48862 жыл бұрын
Thank you for making sense of this so I can retake my Digital Logic final
@AxelmadQ2 жыл бұрын
u saved my life !! thank you thank you thank you !!
@kenmurdock51288 ай бұрын
Solid video thanks !
@markfinn825 Жыл бұрын
Flip flops that use a few extra parts are so much easier to understand . An SR latch made of an OR Gate, AND Gate , Inverter combination is a good place to start.
@siphethonyambi4413 жыл бұрын
Well PRESET It Sets the output-Q and CLEAR resets the Q value. now what makes these special is the fact that they are asychronous to the clock input. if one of these inputs goes active it doesn't matter what are the inputs of J&K or even the clock input.
@JakeSpeed1000 Жыл бұрын
If you hard wire set and reset to ground, how does it ever go High?
@jasons84792 жыл бұрын
I wore flip flops to the beach once. The pins were like stepping on sandspurs but the chips enjoyed seeing their silicon ancestors.
@bonafontciel2 ай бұрын
man 20 years ago my stupid teachers made me suffer when this is clearly explained hre. Today I'm revisiting this from a different angle
@ihsenlagha872511 ай бұрын
there is a mistake the SET and Reset are reversed !
@Mohammadirani-dz3yp10 ай бұрын
Thank you
@vhm14u2c5 жыл бұрын
Thanks for sharing!
@nirmalsankalana64793 жыл бұрын
very clear explanation.... Thank you
@DiffEQ2 жыл бұрын
Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@learninginstudentscafe72843 жыл бұрын
Good work
@angadsinghchaudhary94662 жыл бұрын
Please suggest me a best beginner digital electronics book please
@akashkakati28604 жыл бұрын
How can Q be high if one or both inputs of the top NOR gate is high? Its Q' which should be high because when SET is high, both inputs to the bottom NOR gate is low and hence Q' becomes high at 1.
@bradmiller95072 жыл бұрын
Thanks!
@jamiljawid63904 жыл бұрын
Hello there, I am new in circuit world. My question: to have an output, you have to have two inputs. In flip flops, how it is possible to have output with just one input (I think so)? There are two gates each with two inputs. One input of each gate comes from the output of the other gate. I did not understand this. Thank you
@alexanderkohler8270 Жыл бұрын
Can someone explain. When NOR logic sets the output to 1 for only both inputs =0. must set =0 and reset = 1 (to be reversed to input 0 to the upper gate)?
@BariumCobaltNitrog3n4 жыл бұрын
I found pre and clr on SN74HC74N used in a UV light, an alleged medical skin healing device. It would only stay on for 7 seconds and the On sw was a momentary on with led. So either the pre and clr made the momentary sw a latch or turned it off after 7 seconds. This is a positive edge triggered IC with 2 channels in its 14 pins, common vcc and ground. The device also had a two channel 555 chip. I just started taking things apart to see how they work to re-purpose them. I want to bypass the timer on this light with as little destruction/mod as possible.
@mhmdsalhab82544 жыл бұрын
You are a very talented and smart person
@Lil_Puppy2 жыл бұрын
Q-bar. Flip Flop, Q-Bert. Now you know the origin of that game. Congratulations.
@CrucialMuzic5 жыл бұрын
Next up: Tutorial on VHDL/Verilog :P
@williamsterben4 жыл бұрын
Leapfrog.
@alfredsivanzire35524 жыл бұрын
Why was the letter "Q" chosen for the output?
@Cordycep14 жыл бұрын
All the IC chip spec will use Q to designate output.
@Tadesan2 жыл бұрын
I don't remember buying tickets to the gun show. Oh well, I'm not complaining ;)
@niranjanaprasad4293 Жыл бұрын
Thank youuuuu
@mathmeetsmachines11 күн бұрын
Very nice animations! I know it is standard, but, as a mathematician, I would prefer not to call the outputs of an RS-flipflop Q and Q bar. Why not Q1 and Q2? Then all the misconceptions about the "invalid state" is eliminated from the very beginning.
@colliningraham88383 жыл бұрын
When set goes high output q should go low because its a xnor gate. Set is true so q is false. So if q is false and reset isnt on then _ q should be true.
@jaypee99485 ай бұрын
Can you just merry me, you explaining this is like listening to Celine Deion singing the Titanic Song 😁
@mohamedb7374 жыл бұрын
so I have a question: I think all kinds of flip flops have memory because the wiring typically implies an infinite loop (in software jargon) is that accurate? And at 3:10 why in an RS active high flip flop would setting S to high sets Q to high if for an NOR gate to return 1 both inputs should be set to 0. plz answer I need this info asap.
@mumblic4 жыл бұрын
Because the schematics/diagram is wrong. The labels Q and Q' are placed at the wrong output pin !!
@fergonzalez6874 жыл бұрын
Excellent , but I think the input signals S-R are inverred in the block diagram
@DiffEQ2 жыл бұрын
You "think"? They are DEFINITELY reversed.
@blackred51553 жыл бұрын
Thanks and helpful
@fati3m574 Жыл бұрын
Hi! I can't find the missing episodes (54-59)
@element14presents Жыл бұрын
They are on the element14 community - all TLC episodes can be found here: community.element14.com/challenges-projects/element14-presents/thelearningcircuit?ICID=e14-presents-navigation
@amitassasson18932 жыл бұрын
yeah trying to study for a final tm no one in the class even knows whats going on remotely and i finally have an idea
@FManVybzsta4 жыл бұрын
Thank you very much
@parshantjuneja48113 жыл бұрын
She is pretty good!!!
@majorpygge-phartt26438 ай бұрын
Flip-flops are normally made using cmos technology which is STATIC SENSITIVE and therefore should NOT be handled without protective packaging while out of the circuit, or else the component can be destroyed by electrostatic charges which can be present in your fingers!
@markfinn8253 жыл бұрын
Your pretty. Very pretty. But although I am a little worried of my being a little stubborn I encourage you to imagine Gates , Latches , and Flip Flops of every sort being made with only SPSD relays which shows everything involved in an easy to understand manner (unless you state what beneficial end the circuits shown have. Such as using fewer components by doing something like adding a circuit that resets all the RS flip flops at power up.) I hope I don't sound like I am being mean when my objective includes being helpful . By starting with the simple relay logic method everything can be seen with the eyes as switches in one of two positions depending on whether an electromagnet is on or off. From there following the rules for the type of ICs used will allow the circuits to be converted from one method to the other.
@Vidya19394 жыл бұрын
Tks introduction,will be to u soon
@Stelios.Posantzis2 жыл бұрын
4:44 Active-High circuit state is incorrect (set=1, reset=0, Q=1, ¬Q=0)
@e-earthdiscover3823 жыл бұрын
Wellfull and helpfull video
@richgolfs3 жыл бұрын
Great videos you’ve got posted! Great reference for me because I haven’t studied the stuff in 40 years! JK flip-flop bad pun coming up LOL when I was in college the books we used for studying digital electronics was from HP they were very good also I used to use some books that I got one was from John D link logic designers guidelines I believe it was I don’t have the book anymore but there were a lot of good books. Also there are used to be a series of books from RadioShack written by forest Memes the third great reference material for anybody that’s interested. Assuming they still exist
@DiffEQ2 жыл бұрын
Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@meriemyldz56203 жыл бұрын
that was helpful thanks a lot
@carolinaferreira70582 жыл бұрын
Love you guys!! so amazing so amazing I'm struggling with digital eletronics at university. And I really want to learn it. But sometimes I feel lost cause I don't know how useful it is. I mean Why do I need a flip flop? How can it change lives? sometimes it's so theorical and I really need some basis. Even the lab it's really theorical. I mean How can I save a life with all this knoledge? This is my point. I really believe it's useful but I need someone to tell me about it.
@Arvidje2 жыл бұрын
With a flipflop u can have multiple inputs or outputs on only 3 pins (data, clock, load) For example if u want to make buttonbox of 64 buttons, and your adruino has only 16 pins, u have to use shiftregisters (cascading flipflops) ... these chips are flipflops.. the data line will collect all your inputs and u program your adruino based on the load and clock to read them.. u need only 3 pins for that..
@fahadkhamas3983 жыл бұрын
sis you have error on 3:13 minute. it should be when set is high q dash is latched to high and q is low " the opposite" i hope you check it by making simulation ( nor gate will give high only if both input is low) also the set and reset in opposite position
@mohamedsameeralali44692 жыл бұрын
نعم
@rafihussain5 жыл бұрын
Thanks
@dougsteel74143 жыл бұрын
I find these interesting, you can use the logic for managing user interface script/code, they were designed for tasks emulated in paradigms you find like in screen buttons, toggles, timeouts
@DAVIDGREGORYKERR Жыл бұрын
Something like the 74LS74
@akhterali97085 жыл бұрын
Good job...
@haeythamalmalak11323 жыл бұрын
Thanks :)
@markfinn8253 жыл бұрын
There must be some reason that involves a lot of understanding first or I can not really find a good reason not to use a different SR flipflop which uses one input of a two input OR gate input as the Set input . The OR gate output is connected to one input of a two input AND gate. The other input of the AND gate is connected to an inverter output. The inverter input is the Reset input. The output of the AND gate is connected to the other input of the OR gate and is also the Q output. There are no disallowed states and no inputs need to be assumed.
@DiffEQ2 жыл бұрын
Yes, you need background to try and rethink why NOR gates are used. In essence, just about every combination logic gate is made up of NOR gates. Even inverters are just a NOR gate with both inputs tied together. NOR gates are easy to construct on the wafer. That said, the circuit you describe makes no sense as you do not show where the Q-NOT signal is derived. Nevertheless, what you have described is equivalent to the two NOR gate example: Take the inverted output of the first NOR gate and move it to be the inverted input of the other. You now have an OR gate, and another OR gate with in inverted input and inverted output. This is BOOLEAN equivalent to an AND gate with one inverted input. Yes, you need more background to understand this. It also doesn't help that the example shown here is INCORRECT. The example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@markfinn8252 жыл бұрын
@@DiffEQ maybe I did not describe it clearly but I tried the circuit and it worked for both toggle and data flipflops that I can use and understand easily. So can anyone without needing any type of degree. At the very least it provides a easy answer that gets us there without many hours of study first. The drawbacks of cross coupled circuits can seem to make no sense to amatures. I will be using this circuit to construct a calculator I designed although I do not possess any type of degree
@timgoppelsroeder1214 жыл бұрын
Why dont my teachers give enough of a fuck to explain this to me like this..... thank you
@bowzert5 жыл бұрын
She's speaking the language of gods
@cliffordeng50164 жыл бұрын
definitely
@Shayan7755 Жыл бұрын
everything makes fucking sense when she explains
@arlenestanton99552 жыл бұрын
Weird,scope signal right to left, I can’t get use to it!
@Johennessy3 жыл бұрын
awsome thx
@paultinguely63294 жыл бұрын
Yes, in the SR latch diagram, either the SET and RESET labels need to be reversed OR the Q and Q' need to be reversed.
@vincentcausey84983 жыл бұрын
I got lost when active-low was introduced. I can't understand how the circuits behave differently if they are identical, and all that has changed is putting a bar over the S and R.
@DiffEQ2 жыл бұрын
They are not the same circuits. The first is built (incorrectly, by the way) with NOR gates and the second is built with NAND gates. Unfortunately, the example for the active-high RS is incorrect. Either the SET and RESET need to be swapped or the Q and Q-NOT need to be swapped. It is IMPERATIVE when making instructional videos to be accurate or it will just confuse the viewer. How does anyone , in the know, miss that the output of a NOR gate cannot be HIGH if either of the inputs is HIGH? (3:10)
@isuresh9643 жыл бұрын
how to design edge trigger circuit using flip flop
@markfinn8253 жыл бұрын
Please try the RS Flip Flop as described in my comment below and base T Flip Flops and D Flip Flops on it. Save yourself lots of time .
@ivanchen31413 жыл бұрын
this is awsome
@leonardomelia924 жыл бұрын
Where are the previous lessons? There's is a gab between the 53 and 60th lesson :(
@maker_karen17854 жыл бұрын
They are only on the element14 Community. They are about the BBC micro:bit.
@masterelectricity75602 жыл бұрын
Go on U R the best
@jonneycon61575 жыл бұрын
Say more on the types of flip flop and laches
@jonneycon61575 жыл бұрын
Like give detial view on the block of types of flip flop and do it practically then more with theory
@dancedancebroccoli64854 жыл бұрын
Great video! Thanks.
@jaredr30202 жыл бұрын
7:45 and thats how quantum computers are made, thank you, good night!
@aaronprince80064 жыл бұрын
Great
@kLJiga Жыл бұрын
from 3:00 -- ??! GND on SET and RESET... during all time?!?!
@mumblic4 жыл бұрын
1:24 The labels Q and Q' are placed at the wrong output pin !! Q is connected to the output "reset" NOR gate not the "set" NOR gate PLEASE at least PIN a correction comment or add note to description. YT is already full with misinformation
@j_ordinary4252 Жыл бұрын
3:35 how is Q going to become 0 when not Q is always gonna be 0 with at least 1 input of 1
@Stelios.Posantzis2 жыл бұрын
3:07 is incorrect
@sammin57642 жыл бұрын
🌟
@fransmurati23702 жыл бұрын
Start by showing the real thing, and then demostrate the real thing as well where,when and why you would use it, then go to your explanation, that is if you are interested in becoming the best on the web