How LEDs Work - Unravel the Mysteries of How LEDs Work!
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Date: 2023-11-17
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Comments and reviews: 29
Chris
0: 41: LEDs produce light by emitting photons when a voltage is applied, and they are more energy efficient than traditional incandescent lights.
3: 25: LEDs, including SMD and high-powered versions, emit different colored lights and can be used in various applications.
6: 49: LEDs are used in various circuits and can be controlled to produce different colors and brightness.
10: 06: LEDs and their components explained.
13: 43: The PN Junction in a semiconductor creates a barrier that prevents electrons from moving across, but a forward bias allows current to flow.
16: 49: Scientists discovered how to create different colors of light by blending different materials to form a semiconductor.
Recap by Tammy AI
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0: 41: LEDs produce light by emitting photons when a voltage is applied, and they are more energy efficient than traditional incandescent lights.
3: 25: LEDs, including SMD and high-powered versions, emit different colored lights and can be used in various applications.
6: 49: LEDs are used in various circuits and can be controlled to produce different colors and brightness.
10: 06: LEDs and their components explained.
13: 43: The PN Junction in a semiconductor creates a barrier that prevents electrons from moving across, but a forward bias allows current to flow.
16: 49: Scientists discovered how to create different colors of light by blending different materials to form a semiconductor.
Recap by Tammy AI
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Theo
As a person born with astigmatism and nystagmus, I despise LED's nowadays.
They are practically blinding, burn images in my eyesight that lingers for a long time, and have horribly opaque halos around their source, which makes it impossible to see.
One could say lol don't look at them, which is nearly impossible since nearly everything have them installed anymore, so much of which don't have a method of diffusing or masking/shading the diodes.
This includes streetlights, billboard displays, headlights/taillights, screens, stoplights, ceiling light strips, industrial work lights, spot lights, etc. How can one avoid looking at them when they're everywhere?
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As a person born with astigmatism and nystagmus, I despise LED's nowadays.
They are practically blinding, burn images in my eyesight that lingers for a long time, and have horribly opaque halos around their source, which makes it impossible to see.
One could say lol don't look at them, which is nearly impossible since nearly everything have them installed anymore, so much of which don't have a method of diffusing or masking/shading the diodes.
This includes streetlights, billboard displays, headlights/taillights, screens, stoplights, ceiling light strips, industrial work lights, spot lights, etc. How can one avoid looking at them when they're everywhere?
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Joh750
I want to connect 20 LEDs that have a max of 3. 2v and 20mA each. Therefore I calculate I need 64v with a 2800 ohm resistor using 120v input Am I incorrect in my calculation thinking the volts coming after the resistor will be be 3. 2v and that is all I need. Will it still power up the LEDs. Or do I need to have a power source of 64v which I would like to use the standard 120v input in North America to convert somewhere to 64v. I believe most adaptors have a built in transformer.
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I want to connect 20 LEDs that have a max of 3. 2v and 20mA each. Therefore I calculate I need 64v with a 2800 ohm resistor using 120v input Am I incorrect in my calculation thinking the volts coming after the resistor will be be 3. 2v and that is all I need. Will it still power up the LEDs. Or do I need to have a power source of 64v which I would like to use the standard 120v input in North America to convert somewhere to 64v. I believe most adaptors have a built in transformer.
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Serhii
In 9: 29 you mentioned that a single resistor removes 7V from 9V power source.
This is driving me nuts. I can't find a formula to calculate it anywhere. The only voltage drops information there is: how to determine voltage drops across a multiple resistors. But NOTHING about a SINGLE resistor.
I even asked ChatGPT about it (it's useless.
Could you please explain how do you calculate it? For now I just assume that to drop 1V you need approximately 70 ohms.
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In 9: 29 you mentioned that a single resistor removes 7V from 9V power source.
This is driving me nuts. I can't find a formula to calculate it anywhere. The only voltage drops information there is: how to determine voltage drops across a multiple resistors. But NOTHING about a SINGLE resistor.
I even asked ChatGPT about it (it's useless.
Could you please explain how do you calculate it? For now I just assume that to drop 1V you need approximately 70 ohms.
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SnepperStepTV
They're neat but i've found myself hating them because some idiot decided LEDs should replace incandescent lights and fluorescent lights. When LEDs are used as replacements for those usecases they give me a headache, and I do not like having them in my home at all. I do not care about the higher energy usage, I need the other styles.
Thanks for explaining how they work anyways but this doesn't solve my problem.
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They're neat but i've found myself hating them because some idiot decided LEDs should replace incandescent lights and fluorescent lights. When LEDs are used as replacements for those usecases they give me a headache, and I do not like having them in my home at all. I do not care about the higher energy usage, I need the other styles.
Thanks for explaining how they work anyways but this doesn't solve my problem.
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GABRIEL97
Why aren't 10mm LEDs made with semiconductor chip and anode/cathode frames that are double the size of those found in 5mm LEDs instead of putting 5mm inner hardware in a doubly sized case? Wouldn't it be not only more powerful but would will less epoxy resin waste since the bigger case would be actually used to hold components instead of just providing bigger size but with a similar brightness?
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Why aren't 10mm LEDs made with semiconductor chip and anode/cathode frames that are double the size of those found in 5mm LEDs instead of putting 5mm inner hardware in a doubly sized case? Wouldn't it be not only more powerful but would will less epoxy resin waste since the bigger case would be actually used to hold components instead of just providing bigger size but with a similar brightness?
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Amit
The end of the video kinda undersells how big the discovery of the blue LED was. You name SiC as the blue LED, but in reality its indirect band makes it less efficient for the application. Gallium nitride was the bigger deal, it has a similar gap, but it's direct. It was such a big deal that the engineers who developed GaN based blue LEDs won the Nobel Prize in 2014.
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The end of the video kinda undersells how big the discovery of the blue LED was. You name SiC as the blue LED, but in reality its indirect band makes it less efficient for the application. Gallium nitride was the bigger deal, it has a similar gap, but it's direct. It was such a big deal that the engineers who developed GaN based blue LEDs won the Nobel Prize in 2014.
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Aceology
1. A normal diode restricts current to flowing in one direction.
2. Some TV-LEDs emit light at wavelengths of 1 micro-meter or more.
3. LEDs work on the same principle as most lightbulbs, but WAY smaller.
4. You know what's cheaper?
R E S I S T O R S
5. 'SMD diodes' That's how computer pixels work.
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1. A normal diode restricts current to flowing in one direction.
2. Some TV-LEDs emit light at wavelengths of 1 micro-meter or more.
3. LEDs work on the same principle as most lightbulbs, but WAY smaller.
4. You know what's cheaper?
R E S I S T O R S
5. 'SMD diodes' That's how computer pixels work.
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Joseph
It can be used to produce processor or CPU. nature made everything available for us through square, rectangle and under shapes. Ask yourself how we drive ABCD alphabets light is the basic secret of technology and science science. when you die and when you are alive. Positive up and negative down
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It can be used to produce processor or CPU. nature made everything available for us through square, rectangle and under shapes. Ask yourself how we drive ABCD alphabets light is the basic secret of technology and science science. when you die and when you are alive. Positive up and negative down
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Dan
Truly thank you for this. I have wounded my hole life the science behind the led but every time I researched I got the basics of power gose hear and light. not a single person on this planet in 30 years bothered to actually go deeper. So truly thank you
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Truly thank you for this. I have wounded my hole life the science behind the led but every time I researched I got the basics of power gose hear and light. not a single person on this planet in 30 years bothered to actually go deeper. So truly thank you
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Tyler
LED's are basically amazing stuff. When I was little I only saw LED in red or green, and they were very dim, only useful for indicator lights on various machines.
Then someone invented blue LED and now LED has basically replaced light bulbs.
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LED's are basically amazing stuff. When I was little I only saw LED in red or green, and they were very dim, only useful for indicator lights on various machines.
Then someone invented blue LED and now LED has basically replaced light bulbs.
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herauthon
I bought two types of LEDS -
1 = classic model - 2 pins = 1. 2v?
2 = modern? model - 4 pins
handles 3V - holds red, green, blue
red is not that strong, green is strongest
blue is stronger then red
red uses more mA
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I bought two types of LEDS -
1 = classic model - 2 pins = 1. 2v?
2 = modern? model - 4 pins
handles 3V - holds red, green, blue
red is not that strong, green is strongest
blue is stronger then red
red uses more mA
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nofunsir
One nit: monitors are not LEDs (yet. unless you're talking about the few microLED devices on the market. If you're talking about OLED screens, then that's electrophosphorescence, not electroluminescence as discussed here.
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One nit: monitors are not LEDs (yet. unless you're talking about the few microLED devices on the market. If you're talking about OLED screens, then that's electrophosphorescence, not electroluminescence as discussed here.
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Tyler
Wouldnt it make more sense for diode to be called something like monode? As it only allows current to flow in ONE direction?
So if something somehow allows current tk flow in 4 directions is it called a quintode?
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Wouldnt it make more sense for diode to be called something like monode? As it only allows current to flow in ONE direction?
So if something somehow allows current tk flow in 4 directions is it called a quintode?
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Rich
If someone plonks a mug of coffee with Watts up? written on the side, onto your working tray, the tray will always tip to one side. but the led won't roll off - that's what the flat bit is for.
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If someone plonks a mug of coffee with Watts up? written on the side, onto your working tray, the tray will always tip to one side. but the led won't roll off - that's what the flat bit is for.
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terry
ha ha try a ferrite core with say 21ga. 6 loop wrap slide down over a cb antenna key it up you will turn on both leds no battery just RF power induction used to light up watt meters that way
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ha ha try a ferrite core with say 21ga. 6 loop wrap slide down over a cb antenna key it up you will turn on both leds no battery just RF power induction used to light up watt meters that way
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EVG
Yeah I recall over 30 years ago a teacher explaining that the shaved edge tells you which side of the diode is the positive vs negative. don't ask me to remember which is which though heh
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Yeah I recall over 30 years ago a teacher explaining that the shaved edge tells you which side of the diode is the positive vs negative. don't ask me to remember which is which though heh
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Biswajeet
I have learned that before. But the way you explained, makes the learning more enjoyable/fun making electronics more interesting for newbies. Very well explained and great video.
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I have learned that before. But the way you explained, makes the learning more enjoyable/fun making electronics more interesting for newbies. Very well explained and great video.
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Super
IF it was as a particle, we wouldnt be able to catch a specific wavelength with our antennas, yes? its the wave-function that makes the length of antenna catching the wave, i think.
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IF it was as a particle, we wouldnt be able to catch a specific wavelength with our antennas, yes? its the wave-function that makes the length of antenna catching the wave, i think.
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Abdifataax
I have been struggling understanding this since my untermediate school from now on i can explain to my brother. Thanks for your excellent expalantion. i was amazed.
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I have been struggling understanding this since my untermediate school from now on i can explain to my brother. Thanks for your excellent expalantion. i was amazed.
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blackdaan
so speaking of effiency. blue yellow red leds can produce as much lumen as a white one. cant find high lumen color leds. but the demand of white is high ofcourse.
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so speaking of effiency. blue yellow red leds can produce as much lumen as a white one. cant find high lumen color leds. but the demand of white is high ofcourse.
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Zzed
flattened edge denotes the cathode or anode, i forget which. the colour is produced by 'dopping' agents added to the pn junction. YES L. E. D'S DO GIVE OFF HEAT!
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flattened edge denotes the cathode or anode, i forget which. the colour is produced by 'dopping' agents added to the pn junction. YES L. E. D'S DO GIVE OFF HEAT!
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superspak
This is one of the best videos I've ever seen. Easy to digest for any level of familiarity of sciences, with amazing infographics. Keep up the great work.
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This is one of the best videos I've ever seen. Easy to digest for any level of familiarity of sciences, with amazing infographics. Keep up the great work.
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TheAngryScorpion
you can light both leds on 2 wire 2 color leds also - just half the brightness by using higher frequency alternating voltage. or just AC voltage.
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you can light both leds on 2 wire 2 color leds also - just half the brightness by using higher frequency alternating voltage. or just AC voltage.
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Ivan4es1
I am very curious - why LED lamps are HEATING so much? I mean, LED is should be so efficient - like 95%, so why 9W LED lamp - heating like 9W heater?
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I am very curious - why LED lamps are HEATING so much? I mean, LED is should be so efficient - like 95%, so why 9W LED lamp - heating like 9W heater?
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Fiend
Im only a few minutes in, but I cant get past the part about blue light passing through yellow making white light. Why? Why is not green?
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Im only a few minutes in, but I cant get past the part about blue light passing through yellow making white light. Why? Why is not green?
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Lucas
Does it help identify +/- when both leads have been trimmed? long lead typically is + before installation. That's my idea. Not 100% sure
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Does it help identify +/- when both leads have been trimmed? long lead typically is + before installation. That's my idea. Not 100% sure
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2D
6: 19 I always used to look at this, until I actually found some leds where the smaller plate was the cathode! So not 100% reliable!
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6: 19 I always used to look at this, until I actually found some leds where the smaller plate was the cathode! So not 100% reliable!
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Shaikh
Please i request to you make a video for Panel electric connection with whole work how to make panel and with connection please
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Please i request to you make a video for Panel electric connection with whole work how to make panel and with connection please
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