Very good description! Just detailed enough to get to the important info, but not too much as to get into the weeds. Very rare that you see a tech video like this with the perfect balance! Well done!
Very good presentation. Just for reference, there is another type of optocoupler, the "Photovoltaic MOSFET Driver" like the Vishay VOM1271. These are expensive, special purpose drivers, but are very useful in building MOSFET H-bridges.
I learned electronics in the old school method where current is from negative to positive. Electrons do travel from the negative source to positive. It always confuses me when people refer to current as traveling from Positive to negative. I don't understand why they teaching people this way now.
Ben Franklin labled the polarity as possitive and negitive according to what he believed to be true at time which was + to - flow. It was not untill after all the standard schematic sumbols were created for the diodes and transistors did we know it was actually - to +. This was the conventional current flow. We know now that was wrong but to change the entire world to electron flow current teaching has been deemed unnessary.
Can anyone explain what the numbers on top are? For example.. my octo reads as follows L 1550 817 B W .....I believe the important numbers are the 817B, because I have been able to find replacement octos with those numbers, but the top and bottom lines do no match... For example I found something like L 1440 817 B Y ... Would this work for me? Can anyone explain what each number means, I can't find any videos that discuss that
Hello, thanks for the simple but very informative video. I have a question that what if we don't have two power sources i.e. two grounds. Can we still use the optocoupler there or it does not make any sense then?
Thanks for the video. Since the input from the switch is noisy (bouncing), how would the output look like? would it show also bouncing? this could be problematic if connected to input of a controller, especially with interrupts.
Dear sir, I have a question. In PC817 (4 pin IC) there is no transistor base terminal pin, but in MCT2E (6 pin IC), there is a dedicated transistor pin. I wonder, what is the difference what is purpose of transistor base pin. Please give your view sir.
greetings everyone. very well explained. a question: using a potentiometer we have a linear control of the output voltage on pins 3 and 4 ??? very good. success.
I don't understand why the black wire goes from the chip to the vcc on the other side. I made a circuit in which both power supplies are isolated, and the only thing bridging the gap is the chip. If I disconnect the power supply from the led side, pressing the button does nothing, as you would expect. The same vis versa. The led will not light even though that side has power. It will only light when the side of the chip with pins 1,2 and 3 have power. This is the second video (there are probably more) in which a wire, sometimes 2, connects each side which would seem to me to defeat the entire principle of the optocoupler. What am I missing? I wish I could post the pic of my breadboard circuit for critique.
Hey, you probably don’t need this anymore, but someone else might. The purpose of having the octocoupler is to have both circuits be electrically separated, so having a common ground can make issues there
Very good description! Just detailed enough to get to the important info, but not too much as to get into the weeds. Very rare that you see a tech video like this with the perfect balance! Well done!
Very good presentation. Just for reference, there is another type of optocoupler, the "Photovoltaic MOSFET Driver" like the Vishay VOM1271. These are expensive, special purpose drivers, but are very useful in building MOSFET H-bridges.
I just want you to congratulate of having the talent of knowledge and teaching. Thank you.
It is sad that indians accent in English is mostly degraded, not knowing their talent in Science and Tech.
@@johnpaulminguito he's not Indian.
Ow sorry, asian?
@@johnpaulminguito I think he might be Mexican, based on his accent
Simplicity in explaining .great stuff .Good job .
Very clear explanation of optocoupler. Thank you!
Nice tutorial. Thank you!!
this is the same as vactrol? the internal led can be regulated the bright? to control voltage?
Very good video. Nice and slow and concise.
Excellent presentation and explanation !!! Simple
Useful, thank you
I learned electronics in the old school method where current is from negative to positive. Electrons do travel from the negative source to positive. It always confuses me when people refer to current as traveling from Positive to negative. I don't understand why they teaching people this way now.
Nice
Ben Franklin labled the polarity as possitive and negitive according to what he believed to be true at time which was + to - flow. It was not untill after all the standard schematic sumbols were created for the diodes and transistors did we know it was actually - to +. This was the conventional current flow. We know now that was wrong but to change the entire world to electron flow current teaching has been deemed unnessary.
refer to history. that also confuses the heck of me.
Same thing. Negative charges from - + or positive charges from + to -
Nice video and very well explained
All the best for future videos
how do you know what resistor to put, i put 24v input with a 1.2k resistor and it burned the optocoupler ?
thank you sir for the information
why are the gnds separated, can't you connect them both to the same gnd?
The saviour of humanity right here I tell ya
Great brother...
Thanks a lot for bread board circuit explanation.
Thanks bro,i was really struggling with this stuff!
Can we use opto coupler to make the switching in data line D+ of USB type A?
Would it be possible to use two opticouplers as NOT gates on each other, and make an oscillator? If so, how well would it work?
Good question, not sure will think about it
Excellent video.
Thanks, awesome video very helpful
Thank u sir more power God bless
Very well explained.Thank you
what is the relationship between the input and the output of the optocoupler?
can we use this to control 12V DC motor using arduino input signal ?
Finally understand!!...
Can anyone explain what the numbers on top are? For example.. my octo reads as follows
L 1550
817 B
W
.....I believe the important numbers are the 817B, because I have been able to find replacement octos with those numbers, but the top and bottom lines do no match... For example I found something like
L 1440
817 B
Y
... Would this work for me? Can anyone explain what each number means, I can't find any videos that discuss that
thank you, good information
great video , direct and explicit . congratulations , big like and subscribed as well !
Question: Would I need an optocoupler for this breadboard circuit to work? What significance does it have for the circuit?
Hello, thanks for the simple but very informative video. I have a question that what if we don't have two power sources i.e. two grounds. Can we still use the optocoupler there or it does not make any sense then?
Good, very good 😎
thank you man. this is a great tutorial.
So basically the input (voltage to led) and output load (led) is not isolated??
Then how it will work as a isolator ?🤔
Well explained
Thanks for the video. Since the input from the switch is noisy (bouncing), how would the output look like? would it show also bouncing? this could be problematic if connected to input of a controller, especially with interrupts.
Dear sir,
I have a question.
In PC817 (4 pin IC) there is no transistor base terminal pin, but in MCT2E (6 pin IC), there is a dedicated transistor pin.
I wonder, what is the difference what is purpose of transistor base pin.
Please give your view sir.
greetings everyone. very well explained. a question: using a potentiometer we have a linear control of the output voltage on pins 3 and 4 ??? very good. success.
How does an optocoupler turn on with negative input volts? diode added in reverse To internal led? anode to anode?
Nice testing setup.
I don't understand why the black wire goes from the chip to the vcc on the other side.
I made a circuit in which both power supplies are isolated, and the only thing bridging the gap is the chip.
If I disconnect the power supply from the led side, pressing the button does nothing, as you would expect. The same vis versa. The led will not light even though that side has power. It will only light when the side of the chip with pins 1,2 and 3 have power.
This is the second video (there are probably more) in which a wire, sometimes 2, connects each side which would seem to me to defeat the entire principle of the optocoupler.
What am I missing? I wish I could post the pic of my breadboard circuit for critique.
How do you get the value of the 1k ohm resistor
that was great for today
Sir does PC123 optocoupler can be powered by a 9v Bat?
Pls reply.
Thank you🙂
Superb
How common this design in automotive industry? Compared to the conventional magnetic relays.
Why cant the 9v GND and the 7v GND be tied to a common GND ?
Would it make a difference ?
Nice video and good explanation btw: Thanks.
Hey, you probably don’t need this anymore, but someone else might. The purpose of having the octocoupler is to have both circuits be electrically separated, so having a common ground can make issues there
Wouldn't it be better to compare to a relais?
5:45 If you use a relay, why would you need an optocoupler?
amazing video
Can i change 9 Vdc to 24 Vdc? as input came from sensor?
Many thanks.
Bro, LDR (s817) ki out put pe kitne voltage & current de sakte hai?? (Jis taraf it led rahta hai uske opposite side pe )
2.7V to 3.3V and current in mA
Nice sir
Thanks sir.
The best way is using a mechanical relay to isolate voltages.
My breathalyzer project 2c(◉¿◉)CH Deмо)
മലയാളി പൊളി അല്ലെ.... 🔥
Pnalla😂😂😂
Thanks.
4:27 I have a serious question: What happens if I use less then 7 Volts?
Worst case scenario the LED doesn't emit any light
Nice 👍
Thank you.🇬🇧👍
thanks :)
What is coorent?
Nice 👍👍👍
outputh.....great video btw!
Octocouplers are more of a relay related, i guess
Or will it make loss of data?
Nice
Super
Speed up of our conversation
YOU TUBE - Robotizado con CD 4017 , NE 555 Pilotos Andre
why 7v ? Use 5v ….it’s a better example
I have 8pins 4n35
Please Indonesia subtitle..
👍
Cuurent NO NO NO, Its pronounced current.
Nadeem
Je parle la langue française pas l'anglais
*well done!*
i wonder who gives thumb-down .. i suspect _ElectroBoom_ to be one of them -> because you have the better accent :-D
A photocoupler is completely useless