LED voltages - Collin's Lab Notes #adafruit #collinslabnotes

Check out a wide array of LEDs at Adafruit:

It turns out that LED’s color has a lot to do with it’s voltage. Who knew?

#collinslabnotes #adafruit

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[Gzalo]

I always remember increasing the voltage applied to a green LED and it starts glowing yellow/orange! The curious effect is that if you dial back the voltage, the color will stay the same and it will never be green again. And of course, if you increase it too much, you get a darkness emitting diode :P

[grekiki]

The cool thing is also that LEDs change color when cold.

[averyoldYoutubeuser]

Ohh I remembered my toys in the past powered by batteries. Like some glowing fan toys or cars with dozens of LEDs inside, when the batteries run out, the last thing can still powered on is the red LED light, all the other colors gone and yes, the blue disappear ed first cuz it needs highest voltage and the red needs the lowest voltage so they always the last one to be lit by low power batteries

[davydorynbaev]

Man, i'm so glad i stumbled upon your channel.

[berilium]

your videos are always very interesting and instructive, keep it up!! 👍👏👏

[boardinnebraska]

That's awesome, I now know why the green and blue bulbs still worked on my Christmas lights. I found the corroded bulb(red) and the whole string lit up!! Thanks for the sweet knowledge!

[-bit]

True! I have a bunch of clear leds wich emit red, yellow, blue etc light

[primech-bit]

InGaN green LED's also exist (the brighter type) and has similar voltage drop to blue LED. The GaAsP based green are more yellowish green and is more dim._

[oswaldjh]

Colin's Lab is back?
I would certainly subscribe if it was revived.

[benbehar]

Is that why blue leds are so common in electronics? Because of their closeness to 3.3 volts?

[computersales]

I remember sticking LEDs straight onto 9 volt batteries growing up. I wonder why they failed 🤔🤔🤔

[squnxfisher]

I remember accidentally frying an IR led,
it emitted visible light for a very short time.
and another time I fried a red laser diode.
it got very very bright very short.
after that it was only a bright led
that thing costed me ~10€
lesson learned I think...

[-varishpatil]

Was I the only one that thought led colour depends on the color of the shell?

[matthew_mayton]

I guess that explains why fried so many LEDs thinking they would all work on the same voltage

[lepenx]

An LED is basically a diode, so you can determine its forward voltage with a multimeter.

[Penfold]

I miss actually seeing Colin in his spiffy suit!

[TheCrystalGlow]

Fun random fact: you can’t make a white LED. It’s a blue LED with a phosphorus coating. Always :)

[Ravi_Qant]

It's like a tiny oscillator which generates very very high frequency. Just another perspective.

[merthyr]

So since P =I*V could you argue that red LEDs are more power efficient at the same current?

[unnisathyadas]

What kind of led is that on the table, That square one? Does anyone know?