What is a Optocoupler ? How Optocouplers Work? (Optocoupler Explained)

Hi guys! In this video, I will explain the basic structure and working principle of the optocoupler. Optocoupler is a circuit element that can control high currents with low currents without an electrical connection between two circuits and it provides electrical isolation to these two circuits. Thanks to optocouplers, different currents are isolated from each other and flow safely in the same circuit. As you can see in the figure, 4 and 6 pin optocouplers are widely used in different models. So, let's see how is the structure of the optocoupler?
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[@x_Jamez_x]

I got a breadboard kit and this chip was in it with no explanation about what it does and this video was a massive help! Thanks!

[@markharrisllb]

Why aren’t other tutorials as clear as this? You explained everything perfectly, thank you.

[@eeapplications]

I'm glad you like this. thank you very much 😊🙏

[@Militia.]

I agree, very informative on how the optocoupler works!

[@sigataros]

optocoupler: a safe transistor

[@wmbtech]

I'm brand new to this stuff, but it looks like this chip is just a switch that can couple a controller, safely and wirelessly through IR light, with a high powered circuit to prevent damage to the controller but still allow it to interface with and command the higher voltage circuit. If that understanding is accurate, this was a great tutorial, thanks a bunch!

[@ZothiamaCF]

Almost all other videos I have watched just complicate things. This is how fundamentals should be explained. Thank you sir. ✌

[@sindhuravi9576]

best explanation ever received for optocoupler.. thxxx much

[@eeapplications]

Thank you so much ☺️🙏🏼

[@noumman]

very well explained, i really liked it, thank you sir!

[@salehzinalabdin]

thank you for this video it explains everything very well!

[@new_comment]

Really straight forward, thank you!

[@eeapplications]

Thank you so much ☺️

[@klausmuller5586]

simply good explained

[@goktugozkeskin8355]

Thanks for the simulations appreciate it

[@taherrad153]

Thank you so much

[@eeapplications]

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[@mozayer]

I got it from you only ,simple and easy ,
thanks for your effort.

[@eeapplications]

Thank you so much 😊

[@MaxTornado61]

J hope you add other video. This playlist is great . J have learned many things.... Thanks

[@eeapplications]

Thank you so much ☺️🙏

[@joeborovina4769]

outstanding thank you

[@james77011]

😎 now I have have a little understanding of an optocoupler... Thank you

[@eeapplications]

😊 Thank you so much 👍

[@ReclaimerStudios]

Good explanation! Thank you!

[@eeapplications]

Thank you so much 🙏🏼😊

[@kobie1585]

Boss This was very helpful.....i've liked and subscribed your video, Greetings from Ghana, West Africa👍👍👍

[@eeapplications]

Thank you so much 🙏 Greetings to Ghana ☺️

[@Spaghettinaut]

amazing break down

[@SajithJayawickrama]

Thank you❤

[@logeshlogesh1907]

Thank you

[@Tolderian]

What would be the difference between a solid state relay, a mosfet, and this? As a means of driving a higher voltage/current load?

[@IrreverentSOB]

Excellent video, thank you !

[@eeapplications]

Thank you so much ☺️🙏🏼

[@ahmadattar7335]

Thank you very much..

[@k.pathirana.8868]

Very helpful sir. My congratulations.

[@eeapplications]

Thank you so much ☺️🙏

[@sk8orglobe]

Thanks perfect explanation :)

[@eeapplications]

Thank you so much ☺🙏🏼

[@akhtarkh]

In most cases optocouplers are used in the opposite direction as shown here. High voltage or current signals are on the input side and microcontroller signal input side is on the other side. The third pin is used with a resistor where pull up logic is used for microcontroller input.

[@venkatvenkat8498]

Thank u.....

[@elangopandianpillai5345]

Thanks sir & God bless you. .
When I am studying engineering (1983 in South India). . We don't have this much facility's to learn.
We need to get printed books from USA..
We need to sent money to USA by money order (postal department)...
Then the book will arrive (by postal) after one month. ..
But now a days, most of the students are not studying properly. .
spending time to watching cricket, movie's, some social websites. . .

[@eeapplications]

Hi sir. Thank you so much 😊 I was very happy to see your comment. I'm so glad you like the videos. We try to make videos as much as we know how. Hopefully more friends will benefit.

[@mixme8655]

Thank you sir new subscriber

[@eeapplications]

Thank you very much 😊🙏

[@eddieignacio9560]

Thanks 👍

[@Neoblade057]

Excellent

[@eeapplications]

Thank you so much ☺️

[@shivnnarasareddy8335]

Nice video

[@eeapplications]

Thank you 😊

[@chandraguptarajah6090]

Yes It was helpful

[@eeapplications]

☺️🙏

[@krisztian3909]

Basically doing the same thing as a relay do, just instead of magnet, it’s use ir light.
Am I right?

[@eeapplications]

Yes, it looks like a working logic 👍

[@putra6106]

Its like a relay

[@eeapplications]

Yes

[@putra6106]

@@eeapplications thank you very much 🌷

[@jancenj2218]

How does this work together with a Hall effect sensor and magnet in a joystick?

[@TheJosefin123456]

thank you (:

[@WillBelden]

I don't quite understand what pin 6 is for, though. Also trying to determine if a digital signal from microcontroller to pin 1 requires a resistor at all.

[@peddersoldchap]

Can this be used to reset a Z80 cpu, by connecting the emitter to ground and the collector to the /RST pin?

[@salih869]

Arduino il 12v volt veremeyeceğim için bu sistemi yapsam uzun ömürlü olur mu ? Bİr otomobil projesi için kullancağım arduino ile tetiklediğim 5 volt ile 12 volt geçişi sağlayacağım. Röle kartları biraz fazla yer kaplıyor. bununla daha kompak bir devre yapabilirim. 4N25 uygun mu yoksa başka bir optokuplör önerir misiniz ? Otomobilin ecu unitesi ne kadar akım çeker bilmiyorum.

[@waynefong5960]

This octocoupler is kinda similar to a relay in terms of usage, can someone tell me the difference?

[@WillBelden]

I believe the relay doesn't offer the true isolation of the optocoupler. Because the optocoupler is just light to indicate the current should flow on the other side. But I'm no engineer, learning myself right now.

[@maxwellsimon4538]

relay uses magnetic fields to attract or repel contactor pins for physical connections. Usually used in higher voltage situations, and more prone to failure over time (wear). The optocoupler is solid state, used at lower voltages, and less prone to failure over time.

[@reiya6563]

I’m so confused, I’m using hcpl 3120 give it VCC of 19V DC but the output from gate driver only 6, V with 38% duty cycle

[@hdcreation8953]

Nice sir

[@eeapplications]

Thank you 😊

[@tunkunrunk]

so many components that loo alike , but don't work the same way . the majority of videos on RUclips teaching electronics components shows you simple and common components, and you think you're ready to service any devices till you come across components like Optocoupler and many more that are uncommon

[@andrewel5383]

How high a frequency can one get from this?

[@shahidlatif9358]

There is any optocoupler which is NO NC out put ?

[@dariushunter6792]

Diodegonewild loves saying it. XD

[@Lennings82]

The leg 6 is not needed to be concerned??

[@mattivirta]

have resistor same if 12 V come button input to opto side, etc. promixity sensor 12 V, and output side have 5V out to opto to arduino sense switch what resistor need 12V line and 5 V line not led used.

[@Umitto]

Anladım

[@michaelduke1405]

interesting

[@rheynalcantara6848]

Sir, is opto coupler can be varied the current output by the input?

[@erfinderttn1897]

But why dont use a transistor or mosfet?

[@DRAGUNOV1902]

you can use transistor or mosfet, but you dont have galvanic isolation with it. With optocoupler you make sure that your circuits are separated electronically from each other. Its safer this way, but if you are making some high volume systems, maybe not most cost-efficient

[@user-kl5gx5bs9h]

Bruh a mosfet is a transistor

[@pramodjalgaonkar1221]

Sir esp32 microcontroller can handle 4 octocupler

[@michelvidallo7288]

They are just complicating things😂

[@dustybahLs]

If we dont have these complications emi is real gremlins lol

[@anaslabanie471]

Thank you very much