This was the BEST explanation of a flip flop oscillator I've ever listened to. Seriously you have no idea how many times I have heard this in ways where they don't explain things well, like why does the voltage turn negative. It makes so much sense when you broke it down. I'm an electrician and love electronics. This circuit was always a huge road block for me. It doesn't seem like a useful circuit in sensitive electronics. Maybe for a simple blinking circuit. Where do they use this circuit in? I hope you make more videos like this!

My daughter brought this circuit home from school but didn't have a clue how it worked. And with my elementary electronics, I sort of figured out what was happening but this explanation really got the LEDs of my brain lit! I'm subscribing hoping to further my knowledge of elementary electronics. BIG THUMBS UP!!

It’s the clearest illustration I’ve watched as a layman. The numbers really help me to understand. Thank you!

Indeed top explanation all over the internet!

After browsing tons of video, this is the clearest explanation, especially with the relative negative voltage across the capacitor every-time each transistor becomes closed. Thank you

Hello I know I’m late but if you see this message, i love the work. This is impossible for me to understand at first. Thank you so much!

At last someone who realy know how to explain in the simpliest and precise way electronics, I've looked at least 10 videos on KZfaq, and at the end of each one I was more confused. GlevoTec Well Done!!

I remembered when I was in high school, my first project was to build this LED blinker. Watching this video helped me to understand why and how it worked.

You finally make it make sense. It's been years since I've taken electronics, and I'm sorry to my teacher. But you explained the "resistor capacitor pair" and explaining the -11.3v bit and it clicked. Thank you!

For a relative beginner in electronics, I learned about resistors, resistor colour codes, LED’s, capacitors, transistors. This circuit is a perfect example of how they can all interact with one another and achieve an end result, also the explanation of how it works was sublime. A big thank you. 👍🏼

Great explanation!! Thank you for sharing your knowledge.

Amazing explanation! Not just how you do, but how it works. Thank you

Thank you very much sir I was confused in our electronics lab! Now you solve this! Thank you sir!

Awesome! Helped me so much. Thank you!

Great explanation!!!!!!! I will definitely subscribe. Pleas keep on making videos with this level of detail. I think you are the only youtuber i've seen explain the negative voltage on the capacitor.

Thank you so much for such a clear and yet through explanation of what happens in this circuit. I'm just getting into electronics (having always been mystified by it) as there are several model applications I want to use such circuits for. You just got a new subscriber.

I've got to learn from a rare explanation of such things, thank you very much sir may god bless you.

The best of all explanation I have seen !!!!, thank you!!!

The best explanation for this circuit thanks ❤❤❤

Great video! Thanks for sharing your knowledge!

I laughed and was so happy to watch this video, I'm a software eng from 90s and i can understand today's kids can't imagine what kind of dev environment we have been using in past, same is the case with electronics, today for learning purpose they use MCU to blink LED :)

i dont know how should i thank you, i am looking for this kind of explanation for years ,you are most genious i have ever seen, may allah bless you

THE BEST explanation on YT! Finally! Thanks thanks and thanks! :)

best explanation ever brother thank you

Great explanation, thanks mate

Awesome explanation... Couldn't be any better!!! Finally internalized the Magic...

I am on a journey trying to understand the Astable Multivibrator circuit. It's funny how you think you have a good idea on how the components work but realise, when digging into this system how much more complicated it is to truely understand due to the voltage drop and build up to 0.7V again for the base of the transistor to turn on again. I'm slowly getting there with the help of this video but understanding this curcuit in a fundamental way was a bigger task than I anticipated. Quite frustrating when it's supposed to be "simple" but I had to learn the fundamentals of something I thought I had a good idea about. I hate feeling dumb :)

Great explanation. Thanks.

I agree with all the comments. Finally I found the perfect explanation. You did it!!!

you just earned a like and a new follower, my friend

Very helpful. thank you.

Wow!! u have solved my problem

the best explaination

great vid thx...keep up the good work!

Thank you very very much Sir. The precise ,the best explanation amongst all that have been viewed on this topic. Helped also in understanding something about Capacitor.Simply great.

Amazing!

well you made project easier

Woow excellent 👍

This is really helpful. Also you talk like Dracula and that is pretty cool.

Thank you very very very very very much❤❤

Thank you for the video! This was really helpful to understand. Especial thanks to the part that explains the Component tolerances and the part where the capacitor flip the voltage. Could you please, explain why the Frequency is 1/(1.38xRC)?

must say.........it helped a lot.....too much....thanks.......... :)

In order to simulate this on Lt spice what I should put for the dc operating point

Great!!

Thanks 👍

I get it now. Took me a month

Better than others indian KZfaqrs

It works because the variance in the tolerances of the components. That's why it throws people off, because if the components were EXACTLY equal in their values it wouldn't work. Or you would have to short out a couple legs of a transistor quickly to get it to oscillate. (I've had to do that).

The time constant of the capacitor depends on the series resistance .Is that true? I dont understand. Help me.

Amazing I just wanted to know if it is possible to switch ac led series light with this circuit.

How is that equation derived for frequency?

อาจารย์ครับถ้าทำงานกระเเส ขั่วลบขาEจะไหลไปขั่วแบต ไหลไปหาขาC ก็จะมี บวกลบ จึงทำให้Ledติด เหมือนกับ เหนี่ยวนำ ใช้ไหมครับ สงสัย มือใหม่หัดเร่น

I love this video and it was a great start for me to figure out how this basic schematic works. Thank you. But still I do not catch about voltage difference over capacitor remains, which are talking about ~4minute. And how does the voltage goes from 0.7 to -11.3 on the left side I could not get it. Can you please share some reference to read more about it? Is this about field effect or displacement current?

This is a great video. However I have one doubt, are the capacitors electrolytic? If so, then how are we able to charge them through the cathode? This is bothering me very much. Hope you can clear it out. Thanks in advance!

thank you for the tutorial. i am learning it and i tried to build this circuit but both lights glow oneweaker than the other but they do not flash, i had 330 ohm and 33k resistors. i used 33MFD capacitors and n2222 transistors. am i using the wrong values?

Is it possible to use this to create sound by raising the hertz to the level of musical notes and wiring a speaker?

Hey, I just had a question about the equation at the end. Is there a book explaining the derivation of it?

SIR: VERY OUTSTANDING THE WAY OF DEMONSTRATING THE WORKING ELECTRONICS. PLEASE TELL ME IF THE POLARIZATION OF CAPACITORS ARE OK IN THE SCHEMATICS. I THING ARE THERE IS SOMETHING RARE. JOSÉ

Quiescent current in this ?

what type of wave is being created in this oscillator and how can we change that to other type of waves, please help me understand.

Hi, when I simulate this circuit in simetrix I see both the LEDs lights up in the initial condition then they settle to flip flop oscillation. Could you explain this initial condition? Thanks

Sir, I am a KZfaq learner in electronics. I want to light up led on single wire parallel connection ,one led -ve +ve another one +ve -ve. Can you make a simple circuit with pnp and npn transistor. At present I am getting this from quartz clock board. Can you help me.

But why do the capacitors charge up through the bigger resistor?

4:48 so at certain point both LEDs light up. But that happens really fast that your eyes can't catch it. and it never goes off at the same time. Do I understand it right?

Whats the best way to make one led blink.

Will a 2222a transistor work?

So at one point, the two sides of the capacitor are positively charge because the capacitor side between collector and the led could prevent electrons moving both sides, is that correct bro? But why is not both capacitors charged at the same amount at the same since the have the same resistance?

i am not an electronic guy but likes electronic circuits very much ,can you show me how to use the flip flop circuit to convert DC to AC

I'm a little confused. I followed another video that used a breadboard to build it. But the version I have seems to be all in reverse. The base of my transistors are connected to the positive of the capacitors, my positive battery lead is connected to the emitter of the transistors, the LEDs and resistors are connected between the collector of the transistors and the negative of my batteries. But it all works. Can anyone help me understand why this works, I am very new to all of this. Edit: or tell me what to look into lol

Don't you need to replace the LED with a diode instead of just removing it ? Thank you for your great video :)

The wires connecting the capacitors and their opposite transistors are not connected in between .are they ?

What about 1 blinking and one static

About the oscillation, are the sine waves square or not?

I like your Style

It seems that the capacitor is charge over the resistance of the LED.

How to break the initial balance?

I can't understand how the capacitor gets charged from the branch with the higher resistance?! The negative terminal of the cap is on that side. My understanding is that it should be charged through the branch that has the led and lower resistor value since the positive terminal of the cap is on that side. Please help me understand this.

Am Walid from Tunisia

🤗🤗

what is the minimum and maximum dc supply for this circuit

Hi.why 1.38?

I've found arduino and other microcontrollers end up just being solutions looking for problems. Why 1.38 in the frequency calculation? I'm going to assume I can use 2 variable resistors so long as they're both equal value and adjusted equally an try with my kid but I know she'll ask me why 1.38.

the negative voltage thing looks like magic. 🤔

great video, but it is confusing saying that "open transistor is not conducting".

i dont get why one side of the cappacitor is 0v

Cool bro , explanation very good, but you not teach how that componen united

I had to click on 10 different videos before someone explained how it worked

Why current not going through base pin while capacitor is charging

Still dont understand how capacitor charge from cathode...

There is a mistake in the explanation. In the beginning of explanation, you said that the charging current will pass through 22k resistor towards the capacitor. But the passage of this current is still open circuit in Q1. Current will not move and will not charge in open circuit !!

What l wonder is if this circuit can be added with a Variable Timing circuit !?? For example , if l want L.EC ONE , to remain on for a certain time or Indefinitely ! While LED TWO ! can also be varied for as short or as long as l want it ! Let's say LED one Remains on for ten Minutes ! But when it swings over to LED 2 ! that could be one or even a millisecond if Nessercary ! Before it swings back to LED one for ten or even an hour or more ! In other words l can vary the timer ! To personally custom make that happen or l by varying the timer the Other have some sort of other type. / Style configuration ! ( Whether that can be done I'm not sure and. What extra Electronic components Would be needed Along with the skewmatic circuit Diagram ! David

You said "because of component tolerances". So... the blinking effect is based on a random (not calculated) effect.. tolerances. I wouldn't call this design accuracy. In other words, what should a circuit designer do, in order to make sure which capacitor will charge first?

SIR: I DONT KNOW WHY A LOT OF PERSONS WROTE THAT THEY CONSTRUCT THE GADGET AND WORKS. DEFINITIVELY THE POLARIZATION IS CROSSED OVER. JOSÉ

The negative plate of the capacitor is not charging. The voltage of the negative plate returns to normal as the capacitor is discharged. You confused everyone.

Good video and the circuit works. But it does not really make sense. The capacitor gets charged a tiny bit through the big resistor at the base, then the transistor is switched on and it gets charged from the other side because there is less resistance. But then the capacitor should not discharge, it should always be charged and the second transistor should never switch on. Because the capacitor is charged through the voltage source it should never discharge.

You made it really confusing by changing the transistor to switch an diode pair... I wonder how people call it the best explanation...

bad exp.

2:00 how come it's VCC? Isn't there a voltage drop across LEDs? Why aren't the LEDs turned on at the very beginning since the base->emitter allows for the current flow (otherwise how would the capacitor charge?)