Learn how to test Optocouplers/Opto-isolators with multimeter

День тому

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КОМЕНТАРІ: 46

@xhulilleshi Рік тому

the most clean explaining ever 💯❤

@electronicsrepairbasics_erb Рік тому

Appreciate that

@fredb1130 Рік тому

I think I'm going to enjoy your channel. This was helpful to me. Thank You.

@electronicsrepairbasics_erb Рік тому

Glad it was helpful!. You are very welcome.

@alamin-vv4mx Рік тому

Thanks a lot. Very much helpful.

@electronicsrepairbasics_erb Рік тому

Glad it was helpful!

@kakysamir9681 10 місяців тому

Thank you for the video

@electronicsrepairbasics_erb 10 місяців тому

Thanks for watching!

@jashimuddin7355 Рік тому

Nice video.... sir

@awaisahmed5537 Рік тому

Very helpful video tutorial sir...

@electronicsrepairbasics_erb Рік тому

Thanks and welcome

@success_road999 Рік тому

HELLO YOU HAVE VERY GOOD ENGLISH AND EXCELLENT EXPLAINATION MY CONGRATULATION ALI FROM TUNISIA GOOD CONTINUATION JE SUIS TRES COMTENT انا سعيد جدا بهذا التفسير الرائع

@electronicsrepairbasics_erb Рік тому

Thank you Ali, I appreciate that,

@dzabakwesi2213 6 місяців тому

Thanks for the knowledge. Very helpful

@electronicsrepairbasics_erb 6 місяців тому

Glad it was helpful!

@aymanfaroukhamed999 6 місяців тому

you are Great thank you very much 👍

@vikramtrivedi5468 Рік тому

Thank you Sir

@electronicsrepairbasics_erb Рік тому

Most welcome

@cjeyrock Рік тому

what a great channel.

@electronicsrepairbasics_erb Рік тому

You are welcome C jey Rock

@theprogrammerrolandmc3039 Місяць тому

Remember to check the data sheet very important this test does not apply to every IC example 4N35 right up to ic 4N37 have 4 emitter 5 collector 6 base they all show a reading as they are all connected. I would love to see a video on data sheets and how to understand the input out to understand how to take measurements.

@electronicsrepairbasics_erb Місяць тому

Great point! Noted

@rolanddejesus8685 Місяць тому

thank you very much,your the best teacher...god bless.

@electronicsrepairbasics_erb Місяць тому

You are welcome!

@chinnarao326 Рік тому

Resp Sir! Very Excellent Vedio Sir. Thank U Sir. -- Chinna Rao

@electronicsrepairbasics_erb Рік тому

So nice of you

@BlueWing2909 Місяць тому

tks dude!! you may speak faster!! time is money for us!!😆

@UpInSmoke54 Рік тому

What reading is displayed on the screen? Millivolts?

@electronicsrepairbasics_erb Рік тому

Sorry I don't understand what you are saying.

@seemakhalidseemakhalid352 Рік тому

Very nice Guide Thanks a lot,s Respectable Sir. Muhammad khalid khan Electronic Shope Clifton karachi.

@electronicsrepairbasics_erb Рік тому

You are very welcome, New awesome videos every day

@ahmednor5806 10 місяців тому

🙏💐💐

@ameerhavi364 11 місяців тому

Hi sir

@tnamen1307 Рік тому

Please explain why DIODES are not present in car automotive relays? It is a fact that diodes serves as protection against the back emf voltage from the relay coil.

@UpInSmoke54 Рік тому

Some relays do have diodes.

@tnamen1307 Рік тому

@@UpInSmoke54 please explain what diodes are not used in some car automotive relays. I'm really confused.

@electronicsrepairbasics_erb Рік тому

If they are not present doesn't mean there is no protection, ther are other components that can protect the car circuits.

@ameerhavi364 11 місяців тому

Allah bless you

@shastrichandoo817 5 місяців тому

I have tried this method on numerous boards and it does not work. The only way it works is when i remove the optocoupler from the board and then test. I was misled from your video when i thought that my optocoupler was bad only to realize that it tested good once desoldered from the board...can you provide an explanation

@davidybester2371 4 місяці тому

Ive found that other components (such as capacitors, iductors, transformers etc.) in the circuit cause the multimeter to read different values, as they are all interconnect. This causes the multimeter to read the resistance across those components as apposed to across the component I want. This phenomenon can occur when measuring resistors aswell and cause really inaccurate results. I find that it is good practice to desolder atleast one leg of the component to make sure that the mulimeter is only measuring the component I want to measure and not picking up other random components instead.

@BJcanal270 3 місяці тому

Totally agree with you. Best way is to remove it and used two Multimeters

@gillanland Рік тому

You can't reliably test optocoupler that way when it's connected to the circuit!

@garthlane4070 9 місяців тому

If you say that you can't, don't you think you should say why?

@Manticore1960 Місяць тому

Testing the collector-emitter junction like that isn't good enough to show that it's definitely OK. All it does is show that it's not short. An optocoupler could be damaged in a way that the collector-emitter junction goes genuinely open circuit, so your test would show it as good, when it's actually bad.

@ernieschatz3783 Місяць тому

I would think injecting the rated voltage into the LED would cause a change in EC resistance. Agreed that many of this guy's tests are not the most comprehesive, but they can help people to get started.