How to test LEDs using a cheap digital multimeter (Cylindrical, SMD LED)

- Rotate the multimeter's dial to DIODE
- Put the multimeter's leads in contact with the LED's leads
- If the LED lights up then it good, if it doesn't then reverse the multimeter's leads
- If the LED still doesn't light up then it might be bad/damaged

[@CapitalNick]

It's important to note that some multimeters don't put out enough voltage to drive an LED, depending on an LED's forward voltage. So not lighting up isn't always an indicator of a bad LED.

[@Mr.G399]

so then what do you do?

[@magnogreato]

Very surprised that you did not mention that LED's have a "Flat Side" which typically always indicates that side is Neg...

[@therealrollaz]

Best vid on this, you show it's not "bad" to connect opposite leads, and you showed that it should work on any of the contacts! Thanks for the great video!

[@Za7a7aZ]

The first you tested both gave a indefinite resistance on your meter....you could only tell it worked because your meter provided enough voltage to make it light up. The second one you tested was even more confusing..logic tells you if the led conduct it is good...but it was broken.

[@mauriciomarino6669]

Hello. Thanks for your videos. I have a question I’m replacing the original T10 on my dashboard 67 Ford. On the circuit board with the old bulb installed I get a sound on my multimeter but when I installed the new led bulb it doesn’t make any sound on the multimeter. I checked the led bulb like you show on the video and get the bulb to light up. I jus want to make sure they work before I install the dashboard back. Thanks for your help.

[@RiffRaffMama.]

Excellent explanation. You made it so simple to understand and even taught me something I didn't know about the legs lighting up different parts of the led.

[@RCnerd74]

Thanks for sharing. Simple, quick and helpful video.

[@LeighMaureen-b7o]

Williams Maria Allen Dorothy Walker Edward

[@dariusnickmanesh8021]

Thanks. So good explanation.Because you explained clearly, Could you please make other video about how to check every electronic component with multimeter and repair of dvd recorders and other equipment? Kind regards 👍🌹🌹🌹🌸🌸☺️

[@ErnestoMarquez-t1n]

Ano po settings sa multimeter tester sa pagtesting ng bulbs

[@izzzzzz6]

Not working on all expensive DMM's! I tried 2 nice DMM's and only one of them would give a faint glow. better than nothing i guess.

[@SimonStuff2000]

3:58 I don't understand, why the multimeter always shows 1??
Also, some times it shows ohms? And some times just 0,why?

[@YaBuoyCJ]

Because its stating that the resistance is NONE or more or less very low

[@cameramanmike2072]

And your battery level is different. On a fresh battery it should read 000. As your battery level lowers from being used you'll pick up a one maybe even a two before your meter blank's out

[@davidfalconer8913]

A cheap way to test ( any ) LED is to use a 9 Volt block battery with a 680 Ω resistor in one of the connector leads , this will light any good LED safely ! FYI , you need to attend to your BLACK multimeter lead as it is about to break at the meter plug end , snip the lead , slide over correct heatshrink , resolder and shrink the sleeve ! ! .......... DAVE™ 🛑

[@nopeacefordwicked5315]

Thanks. Really helpful

[@jrockafellow1971]

Dec 2023. I am really looking for how to check an LED standard light bulb that is in standard overhead light fixture. But thanks for how to do micro-mini-LEDs.

[@amaxtech8383]

Good video 👍

[@JACK-wh6jl]

XCLNT DEMO AS ALWAYS 😎😎😎😎😎😎😎😎😎

[@KingKatura]

What about in situations where they are connected so that if one goes out none of them will power up? Im trying to find the bad LED so i can replace it or route around it.

[@rob0516]

Using a DMM, forward voltage on led reads about 2.4v, but when reversing the leads,on anode and cathode meter reads 0.7V. Is that normal? Most videos say OL when reversed?

[@MeLSL1]

Really helpful. Thanks!

[@ozanpress]

What kind of battery the multimeter has inside? Mine doesn't light them up !

[@furulevi]

This model usually has a 9V battery.

[@jacobbabu607]

Very good and simple way of explaining things.god bless

[@danielseychell6282]

Very helpful and understandable..Thank you..👋👋

[@damirpetrovac5126]

Wow, simple and right on the spot explanation. Nice one 👍

[@markbamber7126]

Hi very useful informative video...thanks.

[@micdev42]

really clear. Thanks for taking the time to do the video.

[@deesto]

Wow. Great Macro and night filming work!

[@Papowa]

thanks.

[@dave7421]

Such a great video, so informative and understandable.. well done ! and thank you..

[@LaurieColeman-g4r]

Excellent very well explained thanks

[@EgyptCanada]

👍👌👏🙏🙏

[@Henry_Jones]

Why doesnt the continuity buzzer go off for the good led? The led showing shows continuity but no buzz?

[@yanikkunitsin1466]

Buzzer buzzes when probes connected via small resistance("short circuit"), but LEDs for multimeter looks like capacitor(it's not really, of course), thus no short circuit or buzz.

[@tryhardergeek]

hellol im commenting regarding the video reagarding the batch move from subfolders using total commander
it's my problem too but the only difference is that, instead of files, i need to move the FOLDERS inside those subfolders. total commander bypasses that and go straight to the files, so cant move the folders inside the subfolders. what do i do?

[@furulevi]

I think it won't work with folders... Tell this issue to the author of Total Commander ([e-mail]) maybe it will be added.

[@FknNefFy]

Ah perfect thank you

[@ss-5553]

Great video thanks.

[@albear972]

Great video! 👍

[@WattWise]

Thank you.

[@photondebuger45]

That's trippy

[@viriatomorenohuerta6425]

D

[@kannan.r5748]

A

[@alm4862]

Thank you

[@ericportenard1513]

a l aide

[@manuelp7912]

It really help me! Thanks a lot!

[@guyneeser2029]

Finally, somone that has a brain to show easy to test led's, thank you SIR, my led is ok