HOW TO Quickly Test a LED (including SMD LEDs) #testing #electronics #DIY

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Today, we show you a quick method to check if a standard LED and / or SMD LED works or has been damaged (burnt through). A LED is a Light Emitting Diode, so essentially a special diode that emits light. A Digital Multi-Meter (DMM) has quite often a diode test mode / functionality, and this is what happens when you use it on LEDs!

Note: while this quick test works with most standard LEDs and SMD LEDs, it does not work on ALL the LEDs since new design, packing up more and more energy (like the COB, the 9V / 18V / 36V packages...) with ever increasing power requirements are now continuously released... nevertheless, still handy to know!

► DISCLAIMER
Always make sure you operate in a safe and secure manner.
Disconnect anything you want to test

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▼ CONNECT!
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▼ MUSIC
► "Bluebird" by E's Jammy Jams
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╚╗╔╣╚╝║═╣║║═║╚╣║╠╗╔╣║║╚╝╠╗╔╝
═║║║╔╗║═╣╚╣╦║║║║║║║║║║╠╣║║║═
═╚╝╚╝╚╩═╩═╩╩╩═╩═╝╚╝╚═╩╝╚╝╚╝═
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Having the same problem with higher wattage bulb not lighting the led with multimeter. Thank you for confirming need more voltage

jackjohansson
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OMG that music is sooo annoying.. cant concentrate

shhamad
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2:34 So how do you test one of these LEDs where this method doesn't work?

bauds
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What do you think the dark spot is on the first one? Also, does the whole strip not turn on based on these individual LEDs not working?

EricGranata
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Great video. I use it to test my backlight. Can you give me an expect answer for few short questions?
1.Few LED on my string are broken, one have dot, but t he other look great and have 860 Ohms resistance when measured in the wrong way (just like the working leds). What's the deal with that?
2. The LED with a dot have no resistance in the wrong way, 100% burn. Could I bridge the path with a resistor or a wire for temp solution until replacement unit arrive?
Thanks, happy new year :)

DarkGT
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can i do this on bare component without any soldering?

aeoki
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But with tester you can check only 3V Leds?

MACYNET
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I would assume the light has to be plugged in to test?

chrisdent