This is probably the best breakdown explanation of how diodes and LEDs work i have seen. Looking forward to using it to help electrical apprentices understand the internal workings of LED's. Thanks
@yousafzaiaa7453
2 жыл бұрын
I have very similar views so there is no need for a duplicate comment!
@doktormcnasty
2 жыл бұрын
@@yousafzaiaa7453 Me too!
@jyotibendre2726
Жыл бұрын
Me too
@SulBash3
Жыл бұрын
Same
@dreamhigh2434
Жыл бұрын
No
@ardonjr
Жыл бұрын
Okay this was so clear.. I had to subscribe. Amazing examples and explanation. My compliments.
@TheBoomtown4
Жыл бұрын
You are such a great orator
@tombuilder1475
Жыл бұрын
great visual description!
@Asutosa
Жыл бұрын
Amazing explanation.😁😁
@tomv7035
Жыл бұрын
Slight mistake at 3:15. A p-type semiconductor doesn't have an overall positive charge because if the dopant has one less electron then its nucleus also has one less proton.
@lewebusl
Жыл бұрын
Very well conected topic with Animation to get to the point more compehensive ...
@MoneylessWorld
Жыл бұрын
I didn't understand why the light was emitted when the electron settled in the gap. Shouldn't the light be emitted when the electron left the 'giving atom'? Because at that moment, the atom lost energy which should be translated into light as per the law of preservation of energy right?
@abhinavj4993
Жыл бұрын
You are probably watching this video in a smartphone with 60M+ LEDs like those
@BlondieSL
2 жыл бұрын
I'd sure like to see data on why LEDs made today don't last nearly as long as LEDs made 30-40 years ago. These days, LEDs made in China are so sub-standard that it's not worth using them in serious projects. It's sad.
@hughleyton693
Жыл бұрын
Very simple. .. Yes, I have some LED's from the 1970's still working today, they are working 24/7 for the last nearly 50 years, but they are not very bright.. . . So many modern Chinese LED lights are badly over run and overheat and damage the LED's some going black.
@gyanjyotikashyap4766
Жыл бұрын
My whole master degree bachelor's degree in a nutshell...
@yourdaysbebright4738
2 жыл бұрын
Very educational and clear. I'm really happy to know how these work now!
@brucemcpherson8832
2 жыл бұрын
Good animation, but the diode surface is not covered in PHOSPHORUS, it is covered in PHOSPHOR which is a completely different thing
@hughleyton693
Жыл бұрын
Yes and No. . . . Correct, Basic LED's do not have any Phosphor. . . They radiate which ever colour their doping makes them work at. . . We only cover the LED with Phosphor for White light. . . The phosphor allows some Blue light through and converts some blue light to produce Red and Green light, so our eyes think it is White light.
@fuadtushar7277
Жыл бұрын
Underrated Content. Your clear and cogent explanation deserves more views, man. 😭
@michaeledwardharris
Жыл бұрын
This is the best explanation of semiconductors and LEDs I've ever seen. Exceptionally well done.
@VirtualBrainENG
Жыл бұрын
Thanks!
@crawford323
2 жыл бұрын
I was fortunate to be a technician on a research vessel and was tasked to illuminate evenly split hard rock core samples. The area to be illuminated was only 40 mm in-depth but in order to achieve the depth of field which was specified by the design criteria, the intensity if the illumination required the light source to be very close. 100 mm. As light dissipates to the square of the distance, the very bottom illumination would have “fallen off” enough to be visually detected. As the intensity of LED’s can be increased and decreased without change in color temperatures, I was able to make an array of lights and varied the voltage to paint evenly from top to bottom. This would have been impossible with halogen, fluorescence or other types of illumination. LED lighting was key, however we had to match color temperatures of all of the lights in the array because of the lack of consistency in manufacturing. Also LED lights are extremely heat sensitive and will change color temperature over time. It is a newer technology and has its share of growing pains if accuracy and consistency is needed.
@user-LEDFY
Жыл бұрын
ledI make LEDs.
@v8pilot
Жыл бұрын
I was a project manager at EMI Research (UK) in the 1970s. One of my engineers had used one of the new green LEDs to indicate that his system had passed all fault checks. My boss, an assistant director, was appalled at the extravagance of using a green LED.
@noobda597
Жыл бұрын
How you are still alive
@v8pilot
Жыл бұрын
@@noobda597 Don't smoke, ride a bicycle daily, inherited the right DNA. Plus I was younger than most of my engineers at EMI.
@DiHandley
Жыл бұрын
And some extremely important scientist back decades ago sad he couldn’t see the need for any more than 3 computers. 😉
@Peni-td7eg
Жыл бұрын
ok
@tenrec
Жыл бұрын
Or 640K of RAM@@DiHandley
@11moonshot
9 ай бұрын
As a physics teacher I say: Grand way of explaining the basics of this phenomenon! Thank you for your great animation/ rendering! Michael B. Butter
@MutheiM_Marz
Жыл бұрын
basically, free electron have more energy and bonded electron have less energy. when free electron go in a hole it will eject an excess energy out in a form of electromagnatic wave i.e light.
@b43xoit
2 жыл бұрын
The narrator refers to an "amount" of valence electrons, and the correct term would be "number" or "count".
@garneybaker
2 жыл бұрын
I got to tell you of a little story, regarding the LED. I was in high school at the time, taking “electronics”. We were learning the principles of amplification, rectification, and modulation, utilizing Vaccume tubes. Solid state electronics were discussed in our lectures, and the “light emitting diode” was discussed. Our instructor at the time, who had as a young man apprenticed as an electrician, and installed the first fluorescent lights in our city, stated “A very unique principle of electronics, but appears to not serve any useful purpose”. God I wish I had not listened to that lecture 😂😂😂
@b43xoit
2 жыл бұрын
"Vacuum", not capitalized. ". . . utilizing vacuum tubes."
@rishikwatt483
2 жыл бұрын
Liar.
@hughleyton693
Жыл бұрын
Well he was sort of right in the 1970's . . . LED's were very low light levels, the best could carry about 6mW or 0.06W of electricity. . . . I was the first in our design centre to actually use LED's for Indicators.. . They were 3mm and 5mm diameter in those days, and became very good indicators, only Red, Orange, Yellow and Green, in the early days, but that was enough for indicators. . . I mainly used frosted white glass LED's so that if you saw colour, it was working, and not sunlight reflected of the glass ( plastic).. . . I used many in the equipment I designed, amongst just indicators, I used them to indicate the voltage in circuits, thus saving technicians using voltmeters to see if the circuit was On or Off. . . In one Power supply circuit, the LED would show Green when all was good and Red if there was a problem.
@JamesFolkers
10 ай бұрын
@@b43xoitEh?
@b43xoit
10 ай бұрын
@@JamesFolkers , I'm saying that for clear writing, @garneybaker, 1 year ago, should have said "utilizing vacuum tubes" in place of "utilizing Vaccume tubes". There are no such tubes as "Vaccume" tubes. They're vacuum tubes.
@SilenceDogood76
2 жыл бұрын
All diodes can be light emitting, some only once...
@jorgecueto9649
Жыл бұрын
I casually have seen many many videos of diodes and semi conductors, but this video is explicit and straight to the chase and I've finally understood
@ultimateenergizerguide467
17 күн бұрын
At the core of every LED is a combination of two materials: N-doped and P-doped semiconductors. N-doped silicon, infused with elements like arsenic, carries extra electrons, while P-doped silicon, infused with elements like gallium, is characterized by "holes" where electrons can reside. When these two materials are placed together, a small but powerful phenomenon occurs-some electrons from the N-doped side flow into the P-doped side, creating what’s called a depletion zone.
@davidbwa
2 жыл бұрын
Thank you for a detailed yet easily understandable explanation.
@manfredgahr4748
2 жыл бұрын
Hello, thanks a lot for this brilliant explanation! I finally grasped, how diodes, transistors and LEDs are working. Really excellent, this video. Greetings from France, Manfred
@user-LEDFY
2 жыл бұрын
I make led lamp beads.
@hughleyton693
Жыл бұрын
Transistors are very different, but do use two junctions, the main ones I used were n-p-n junctions so worked easier with +V supply voltages on the Collector. . . . Transistors are Current amplifiers, not Voltage amplifiers like Valves ( Tubes ) were, although modern FET Transistors are Voltage amplifiers.. . . The simple principle of using a normal BJT transistor, the most common type. . . Is that you put + Voltage onto the Anode or Collector and due to the junctions, no current ( electrons ) flows between the Emitter to Collector.. . But If you put some +V on to the Base, then that easily causes Current to flow between the Emitter and Base, which then opens up the path for good Emitter to Collector current flow. . . . Very typically you could get about 100 times as much Current flowing between Emitter to Collector, as the Current you made between Emitter to Base.. . We call that a current Gain or Hfe
@dougc.1773
2 жыл бұрын
White light LEDs are a type of "Flourescent" light. They work the exact same way that flourescent tube lights work!
@hughleyton693
Жыл бұрын
YES, that is correct, so technically they are not LED lights, but Flourescent Lights. . . . Actually the phosphor is translucent, and allows some Blue light through, so they are a combination of Blue LED's and Red/Green Flourescent lights. 🙂
@jhanthony2
Жыл бұрын
Nice clear explanation. Thanks for all the effort you put into these. And those graphics!
@jonni2734
Жыл бұрын
Beautiful video, thank you!!!
@danford7532
2 жыл бұрын
This info in not accurate! While it explains how regulare diodes work, light emitting diodes produce light when a voltage is applied, and forces the electrons across the band gap or orbit level, this is temporary, and the electrons fall back across the band gap producing photons. These photons are produced at the junction of the doped and regular silicon. Doping is usually Galium arcinide, and junctions are vertically oriented on most typical led lights, and horizontally on high power diodes which produce intense light called lazing. When collumnated with a fiber lense is how a laser is made.
@hughleyton693
Жыл бұрын
Yes, you are correct, the video sort of said that, perhaps not as clearly as I understand it. . . Yes, the forward current through an LED does cause electrons to move up to a higher, more energetic level, state or shell and yes, they emit light when they fall back to their natural energy level or shell.. .. . Electrical energy In, Light energy Out, and some Heat energy out.
@ultimateenergizerguide467
17 күн бұрын
A Light Emitting Diode (LED) is a remarkable electronic device that converts electrical energy into light using semiconductor materials. At its core, a LED has two slightly different semiconductor layers. When an electron moves between these layers, it loses energy in the form of a photon, and this process generates light. The specific energy lost determines the color, giving us a wide range of colors from red to violet. For white LEDs, the process involves a blue LED coated with a phosphor. The phosphor absorbs some of the blue light and re-emits it as a lower-energy yellow light. The combination of remaining blue and emitted yellow light creates the white light we see. This simple yet elegant mechanism has revolutionized lighting technology, making LEDs efficient, durable, and versatile.
@randycarter2001
2 жыл бұрын
They often eliminate the second electrode wire. The die is mounted to, in your video, the metal reflector. This becomes the negative input. The electrons pass upward to the junction and are bled off via the positive electrode wire.
@hughleyton693
Жыл бұрын
I never ever saw any like that or used any like that.
@lightbox617
Жыл бұрын
This is seriously good science at a level and with language that I can understand. color temperature was an early problem with LED light sources. the temp was "cold" and ugly. Quite quickly, manufacturers figured out how to add contaminants to give a warmer light.
@videolabguy
2 жыл бұрын
Phosphor. Not phosphorous. Phosphorous is an element and phosphors are usually compounds. Otherwise, an extremely EXCELLENT video. Thanks!
@mikerilling2745
10 ай бұрын
So are you saying the light is only emitted when it crosses over the junction and arranges itself in an orbit with the other atom??
@markallen1782
2 жыл бұрын
Reverse polarization of a PN junction can be used to vary the capacitance of the junction, turning it into a variable capacitor for radio applications.
@chefjoesplaylists2565
2 жыл бұрын
Electrically tunable radios before Sorfware Radios used these and they were called Varactors, such as the MV204.
@hughleyton693
Жыл бұрын
Now that is getting far more into electronics.. .. Yes, VeriCaps. . . Going even further, we made Parametric Amplifiers for Microwave Receivers, using that principle.. . . A parametric amplifier principle is that you feed the signal in, when the Capacitor value is high, then you effectively pull the plates apart, reducing the capacitance value, which from ½C.V² will now have to increase the Voltage across that capacitor. . . So now you have a Voltage amplifier for very small, low level signals. . :-)
@thegametechwithluke6155
3 жыл бұрын
Very nice. It answered my question more than i expected!
@VirtualBrainENG
3 жыл бұрын
That is great 😁
@Ehill315
2 жыл бұрын
That was an enlightening video on LED’s and Diodes. Thank you for sharing.
@malte1984
2 жыл бұрын
pun intended?
@jackmatson962
2 жыл бұрын
I first learned of LEDs in the mid- or late 60s and was fascinated as the different colors were developed and efficiency increased. I was aware of the narrow spectrum of light they produced so was excited to see the advent of the 'white' LED. Not so much to my surprise, they are actually closer to the old fluorescent lamps, with the blue energy supplied by the PN junction instead of the mercury arc. But, like the fluorescent, most of the useable light comes from the conversion supplied by the phosphor layer that mimics the colors 'temperatures' we all knew back when: Warm White, Cool White, Daylight, and everything in between. Should these be more accurately called SSFs (solid state fluorescent)?
@b43xoit
2 жыл бұрын
Sounds like a good term. And I notice that some of those fluorescent materials, but not all, are a little bit phosphorescent. So, when I remove the power and look at my light, it's still glowing.
@dimpumutyala2656
Жыл бұрын
Hi sir I am India and i am a electrical engineering student i can't understand electronics so can u please help me with this subject because I don't have any knowledge about this subject please sir
@rongarza9488
Жыл бұрын
Great video! God bless China (production), and the scientists who developed this worldwide.
@JohnsTrainVideos
Жыл бұрын
These fake synthesized voices are so annoying, they ruin the whole videos.
@NightWear21
Жыл бұрын
Excellent video! I've known diodes and studied them. This is gold. Thank you.
@davido1953
2 жыл бұрын
chemistry hard
@randyarbogast2716
Жыл бұрын
This was excellent! I had watched other tutorials before but this opened my understanding! Thank you!
@prasadvuriti5824
Жыл бұрын
thank you for the clear explanation
@charlesw9875
Жыл бұрын
That's one of the clearest descriptions of anything I've ever seen.
@stevedmytrusz8347
Жыл бұрын
Great video...Thank you! I didn't realize how much we knew about LEDs back in the 60's. Or 70s - recent, actually. Technology was mostly there, it seems... but not quite.
@user-uw1wq9rj8g
Жыл бұрын
This is basically a semester lessons being compacted in 8 minutes video
@mrfxm55
2 жыл бұрын
This is a cool channel that my brain just absorbs every minute of the content.
@thelastghosthunter-2
2 жыл бұрын
What is the smallest led ever produced?
@BushCampingTools
2 жыл бұрын
Not bad VirtualBrain, not bad at all!
@warlockpaladin2261
2 жыл бұрын
Former engineering student here... this was very nice work.
@rexpayne7836
8 ай бұрын
Great content and presentation. 🇦🇺 😊
@RixtronixLAB
2 жыл бұрын
Nice video, thanks for sharing :)
@GeniVaraku
Жыл бұрын
4:19 is where the video progress bar meets with the vertical line spliting 2 sides of the screen. you are welcome
I had never imagined coming across such beautiful explanation. Your effort in producing such videos can never be less than the excellence of nobility 👏👏👏
@lsupreme
2 жыл бұрын
7:42 I was wondering why on a microscope there was a blue dot, but now i know :D
@sanneo1
2 жыл бұрын
Subscription owned. Great video, thanks :)
@ashadevi6515
Жыл бұрын
Please make hindi version video
@bmstyle
Жыл бұрын
Humans went from beating each other with sticks.......to talking about atoms, p and n semiconductors........the thought of what we can achieve if the whole world collectively put their minds together to further humanity is truly unimaginable.
@beyondfossil
2 жыл бұрын
Excellent and to the point! I'll save this video as a handy reference.
@jamesslick4790
Жыл бұрын
I am 61 years old. I grew up with incandescent and fluorescent lighting. LED lighting is a "GAME CHANGER" (as the "kid" would say). Unlike a lot of "older" folk, I am firmly in the camp that a lot of NEW tech is better. Forget "hipsterism". Digital photography, digital audio and digital audio were "wet dream" fantasies to my 1970s ass. (Would have had documented a LOT more of my life had they been "consumer items in "the day") LED lighting solves the problem of buying bulbs every week with the BONUS of using a LOT less power. Sure, I'd rather NOT have to navigate an "iPod" in my car to work the radio or HVAC (Would TOTALLY go back to 1982 dashboards if I could) But the rest, Yeah. Much, Much better NOW than then!
@Adhithya2003
2 жыл бұрын
Brilliant. This channel has a bright future.
@alwinejohny9166
2 жыл бұрын
When he said "you don't like chemistry" I cried because of someone atleast know my feelings.
@jovetj
8 ай бұрын
Nice video. Except for the crummy computerized voice narration. It's like baking a wonderful cake and then topping it with sewage. 👎👎👎No more *VirtualBrain* videos for me!
@the2012fad
2 жыл бұрын
Excellent work! Do you have a video on full spectrum LED grow lights? Thanks again!
@floorpizza8074
2 жыл бұрын
This video covers that. You know how the video says to swap out the doping agents for whatever color light you want? Yeah... that's the part.
@hughleyton693
Жыл бұрын
You need to go to a garden centre to discuss that.
@CogentConsult
2 жыл бұрын
Good info, but that’s the worst voiceover I’ve ever heard.
@DoubleplusUngoodthinkful
9 ай бұрын
It's like a short-documentary-write from the 1950s got ahold of graphics technology from the 80s and computer voice technology from the 20teens and decided to make a video on modern technology.
@ojichrom8448
10 ай бұрын
That's very good for flashlights or bulbs but for all types of lamps made with the built-in small LED bulbs (integrated LED lights) that ain't. It's not eternal like the lasers or the lights that are not from the lamp type. My new big mounted LED lamp is not working anymore. I'll buy a small and a big one on internet this time and not LED.
@saskiavanhoutert6081
Жыл бұрын
Frits Philips made the LED ( Light Emitting Diode) in which year I don't know but it was far before WW 2, thanks for this video, great explanation, kind regards.
@solaokusanya955
Жыл бұрын
💯...thank you very much!...I love you!..this is best by far, the most explicitly explanatory type I have sent of this phenomena!.. May the universe continue to favor you!..amen!!
@adamdelarozza1985
10 ай бұрын
That means that four LED's assembled to make a Bridge rectifier, can produce D.C. while lighting uP!? cool
@shivanihr5879
Жыл бұрын
Best explanation ever. 👍❤
@mohamediqbal395
2 жыл бұрын
I have a doubt ??? Is this video, computer generated ??? If so, then how can it be proved that the REAL science behind the LED BULB is as exactly as explained in the video.
@mohamediqbal395
2 жыл бұрын
I have a doubt ??? Is this video, computer generated ??? If so, then how can it be proved that the REAL science behind the LED BULB is as exactly as explained in the video.
@Gfysimpletons
Жыл бұрын
Life was so much better in the late 70’s-early 80’s……no internet, had to physically look it up in a book. Got to meet new people/friends at the library. 🖕🏿
@aaronthenorm5400
Ай бұрын
Great exsplanation! Now tell me how this was ever figured out!!!!!😮
@MujahidJB
6 ай бұрын
It would have been better if you'd have used a human voice. The A.I voice has become a little irritating. Otherwise, it's one of the best explanations
@dannyunixanalyst9018
2 жыл бұрын
Good work. Great animations. I understand LEDs now :)
@user-kareem07x70
5 ай бұрын
Thank you very much for your wonderful simple explanation 🤩🌹💯
@aishwaryasubburethinam6532
10 ай бұрын
Amazing explanation
@colinwhite5355
Жыл бұрын
I watch these videos to further embed my lack of understanding. On this occasion I surpassed myself.
@thinkingoutloud6741
Жыл бұрын
The only thing missing is the next question: how is the LED different from ordinary incandescent bulbs?
@mdafrad2568
Жыл бұрын
This video explanation is great ,but it could be more great if this video comes in Bangla language. :)🙃🙂
@niranjanselvamperumal3397
4 ай бұрын
Very good explanation . Encouragement for those who in this field.👍
@artofbeingurself2972
2 жыл бұрын
Definitely the person who explained is a best visualiser....my god ...just blown away😅🌟
@metricstormtrooper
2 жыл бұрын
I really love the synthetic narration......Not. another chanel for my "Do not recommend chanel" list, goodbye
@surge_alloy
Жыл бұрын
woaaaaaaaaaoaooooooowwwww ! your animation & explanation is so so valuable ! Thanks for teaching me ! 7099 respect & 6700 love for you !
@jrzzrj
4 ай бұрын
For me, much too much more than I need to know. But I am sure there are at least six people who will benefit from this detailed video. Thanks.
@sebastiansnake
2 жыл бұрын
0:12 oh that smell again
@bobishere6527
2 жыл бұрын
When an LED quits working, it becomes a DED..... Dark Emitting Diode.
@hughleyton693
Жыл бұрын
Most failed LED lights failures, are due to the driver electronics failing due bad design.. . The LED's them selves only fail when they have been over driven, way above their specification to try to impress people with how bright they are, again bad design.
@Jeducation22
2 жыл бұрын
When i heard the computer voice, thought this would be shite! But no, good video with clear explanation. Thanks
@pachino11839
Жыл бұрын
So electrons flow through a wire to produce light? Nah! Energy cannot be destroyed and it just changes state? Nah!
@PyubX
Жыл бұрын
How did they discover this...... how the hell do you determine how electrons behave without ever seeing it happen and then you make a hypothesis based on a hypothesis and you pursue it and it turns out to be right. That has to feel so good. To make something which will benefit all of humanity
@markb1764
Жыл бұрын
The LED itself may have a long life but the electronics of the drivers are crap They don't last any longer than a cheap CFL
@pse6775
Жыл бұрын
I forgot everything after I graduated since my current job does not require any electronic knowledge. It is a very nice recap for me.
@SaniyaSachinm
Жыл бұрын
Thanks I got New KZitem Channel from this video to learn more knowledge.
@99991ray
Жыл бұрын
Why oh why must people use background music that competes with the dialogue ???
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