They also emit smoke for quite a long time before starting to become light emitters.

@@SeanBZA pretty unique design!

@@SeanBZA All computers run on smoke, thats why when the smoke comes out they stop working.

@@SeanBZA Every machine is a smoke machine if you operate it wrong enough

Resistors actually emit light all the time, the problem is we can't see it because it's around 6000nm in wavelenght. But you're right - visible light is usually a one time event.

galvanic cell Electrolytic cell Beer Hangover Hair of the dog...

Now I'll waiting for the next generation of phones to have a solar panel screen charging button

roomy's toothbrush toilet cleaner cattle corn car fuel condoms rifle protectors crazy glue wound sealer microwave oven hair drier Lol, maybe not the last one but I liked this video.

ceramic microphone ceramic capacitor buzzing ceramic caps

Diodes are not necessarily LEDs. Depends on the band structure, e.g. silicon makes solar cels and diodes but will never electrically emit light.

or LSD : Light swallowing diodes. Sounds better to me.

Smart LAD

Funny Tad

lad lol

Nope because a) all diodes are light absorbing (so there is no reason to distinguish that property of them by a different name for the particular ones used in a solar panel) b) the diodes are only a component of the *panel* hence we name the entire *panel* according to what it does so a *solar* **panel**

Neat!

Care to share what you know?

@@mrwess1927 Any opamp circuits with high gain can be affected by diodes connected to the inputs. I think an audio preamp with a pair of clamp diodes (glass encased 1N4148) across the inputs, for static protection picked up a hum from room lighting. and a high gain DC amplifier (for a seismograph) connected up as an absolute value circuit, had offset problems, if operated in the light. In both cases, either switching to a black epoxy cased diode, or using a black plastic transistor as the diode, cured the interference.

That’s interesting, a lot can be learned from experience.

Aren't they usually encased in non-transparent mold?

Hello CIA my old friend...

*NSA joined the chat*

LEDs can also act like a pixel from a camera 😉

If you take a microphone apart, and a pair of head phones, you will find the diaphragms look very similar.

Vincent Robinette depends on the mic. Dynamic microphones are closest to speakers

That feeling must be amazing

So if I push my car the tank will fill with gasoline?

@@stargazer7644 🤣🤣🤣 I wish 😛😂😂

yea now hook a load up to an oven burner and see if it powers your device by pulling heat out of the air

@@stargazer7644 and if someone pushes you..

I also learned Electronics in the late 70s and 80s. I'm not sure what type of diode they use in solar panels. But I always thought they were made up primarily from what we knew as LCDs light-collecting diodes versus LEDs light emitting diodes.

The energy companies would lose money probably

Maybe you worked in the warehouse?

@@DakCuh No this way is not efficient i think, all diodes contains this property but I think there is a reason we don't really use them like this.

I imagine a massive bank of these super LED's would make for a nice cooling system for a spaceship.

Wait. Are you saying that LEDs at a high enough efficiency can actively absorb heat in molecules and emit it away as visible light? So is it theoretically possible to pump heat away out of a spacecraft in vacuum just by shining a spotlight with this super LED in a direction?

@@BrokenLifeCycle yep. It has been demonstrated in laboratory settings but isn't practical at the moment. It's infrared light not visible light though. www.wired.co.uk/article/230-percent-efficient-leds

Man, thanks for sharing thats so cool to know...

@@sunmoon1234 Peltier modules are certainly semiconductors that act as heat pumps. But they don't turn the heat into light, they work on a different principle.

The Shockley equation is quite simple ;)

I've seen someone that was determined enough to make their own semiconductors, and I have to agree. What a crazy process. And she was just about capable of making transistors... Maybe at a stretch an integrated circuit consisting of about 3 components. When you see it as small-scale improvised production it still looks nuts, but not quite as crazy as the real methods. And of course this improvised stuff was using commercially available wafers, which are really difficult to produce in their own right...

My textbook on the physics of electrical components also thoroughly disagrees.

@@KuraIthys It's Jeri and we all know her. She wasn't "close" to making transistors, she actually *made* transistors.

They are super simple, just like every other element in modern electronics, its confusing due to the scale(small) and materials used (compounds) but in actuality every peace is just an arrangement of positive, negative, and dielectric materials, even rocks have these various properties, everything dose to some degree, when arranged properly you get what we call electricity. Look into how all these components are made: transistor, diode, compactor, battery, you will see it's just various arrangements of P,N, and dielectric.

@@jatre5938 You're stupid.

@@Hallowed_Ground Dud just gave the man an advice..tf is ur problem?

@@fantaisiechopin8240 You're stupid.

nalyd doow you got him there

Mantresh perhaps they’re not a native speaker, but hopefully it improves!

Also some motors and dynamos. I was very happy when I found out you can wire two Lego Mindstorms motors together and control one directly by turning the other.

I mean, he touched on the reversibility of the piezoelectric effect when he demonstrated that microphones and speakers are interchangeable :)

@@IceMetalPunk oh yea that's true, i kinda forgot about that video until he mentioned it and even then the memory is foggy...

IceMetalPunk Actually, that’s not really the piezoelectric effect at play, it’s EM induction on the speaker and something more complicated (that has to do with capacitance) on the microphone.

There is no single correct answer to this. There are many different techniques to build a microphone. You can use a magnet attached to a membrane. This membrane is vibrating when you speak on it and the magnet induces a current in a coil. Other microphones use a capacitor with one electrode being a charged isolator (electret). The electret electrode is attached to a membrane similarly as in the previous example. The sound waves make the membrane move again which causes the distance between the electrodes to change. This movement causes a change in capacitance and eventually a change in voltage across the capacitor. Microphones which use the piezoelectric effect exist, but they have a rather bad sound quality. But they are mechanically sturdy which makes (or made) them useful for some applications.

Wow thats true

Daniel Leal it happend with risc proccessors.

Sometimes the led right in rpi begins to glow with our any external power supply

It wasn't a diode, it was the power IC (component no. U16), which was a WL-CSP chip. Basically an integrated circuit without any packaging, attached directly to the board. Still caused by the photoelectric effect, so the principle is the same, but it wasn't a diode.

Realistically this applies to any component, but as far as i know risc is extremely low power, so essentially it's much easier to overvolt.

holy shit. that is absolutely fucking mad genius

this comment is extremely underrated

I’m sorry but solar panels emits Infrared which is invisible to human’s eyes, also power generated from OLED is not enough to charge your phone as it is so low it turns into useless heat when charging.

Also thank you for hosting a TEDTalk.

r/wooosh

Cole Ikr

@Nopparuj r/wooosh

That's interesting considering you commented this 3 minutes after this 5 minute video was uploaded. And every other science video I've watched today. Hmmm...

Rhyme Bito Aha I type comments whilst watching the video bud :) Nice to see you’ve got a similar taste in Science UKpostsrs though!

This guys simply does not understand the physics involved here.

_Illuminati confirmed_

Aspect Science You’re great as well!

That would be LED Soundsystem

Don't forget your solar power microphone!

Make sure to use a generator as a fan for wind effects

that would be a massive waste of energy! )

Well, technically the speaker used as a microphone also produces a voltage across it. What you mean is an amplifier connected to a speaker all powered by an LED.

Within 30 minutes of each other. What a time to be alive.

Now if only vsauce would upload I'd be in heaven.

dont forget Tom Scott

Quick! Someone calculate the odds.

Hah, I came here straight from CGPGrey's vid :).

Hahahahaha!

After that: How your toaster can be used as the pc that runs all my teammates computers

Well you can use a fridge to be a heater and a heater to be a fridge

I mean with a Samsung smart fridge you can do at least the first one

I can drive my car forwards and in revverse.

also peltier elements, put a power in one, and one side gets cold and other hot, create a temperature difference and you get power out of it.

And piezoelectric crystals!

All I heard was, you reverse the polarity to solve all your problems.

And unlike diodes or speakers/microphones, electric motors are actually quite often used as generators as part of their normal operation. Eg. regenerative braking in electric vehicles (cars, trains) or pumped-storage hydroelectric power plant. They can be designed in such a way they're effective at both.

NoLlama Yeah, in fact most motors are also good generators, and vice versa.

Actually, if you search you can find projects of homemade solar panels using only LEDs

YES, AFTER CHRISTMAS YOU PUT YOUR TREE OUTSIDE in the sun to provide electricity until the next christmas

@@RabbitholeIsrael dayum!

But a very inefficient one

What about old LED TVs? Maybe a way to recycle them instead of sending them to the trash pile. Saving the planet one TV at a time.

Woke

Life=lie

@@superjeffstanton c

LED TVs are just your usual LCD with LED backlighting instead of the usual CCFL bulbs.

LG=Looking Glass?

Bloody medics.

STOOPID IT DONT WORK THAT WAY

@@drewadkins4099 hey man good luck in the Wooshlands

@@SteveMould Hey! The medics our thing (biomeds/nurses) to lay into

Entropy

yeah, but not enough to induce a change/imbalance in the circuit

But you have a good point :)

The problem with your statement is the word “reasonable”. LEDs are optimized to emit light, and that makes them poor solar cells. Solar cells are optimized to generate electricity, and that makes them poor LEDs.

Indeed, most light is outside our visual spectrum.

Omar Omokhodion Yep, though we can still see some NIR from remotes and perceive FIR with our skin as “heat”.

@@0MVR_0 light, electromagnetic radiation, same difference.

except the display heats up pretty signifigcantly by absorbing all the light heat degrades overall lifetime of any electronics, but especially for the battery :/ I had my phone shutting off due to overheating (on a relatively hot day, mind you) after I left it in the sun for a while

You can get USB power banks that have solar panels to charge them.

@@marcusfred4480, that solar panels on powerbanks aren't made for charging them, but only for keeping energy

@@Unerty What??? Lol! I can assure you that the solar panels absolutely put charge in the batteries.

But then they will want $3500 for a phone.

well apple did upgrade there firmware so you can charge your phone in the microwave

You could do that, but you’d need infrared vision to read the screen.

@@jamesdeegan7365 It's faster than using their chargers too!

@@jamesdeegan7365 screw you guys because of you not just did my Phone not charge but i wrecked it and my microwave and my phone now i have to buy a new one Screw you Nah im just kidding

@@fayenotfaye you ever heard of a window lol

Hey there, my father (village mayor) has issues with a company providing public illumination powered by solar panels. We would like to apply this method to check if are some panels faulty. Could you give more practical insight? How much current and what voltage is needed and is a laptop camera or front facing Iphone camera (lacking UV filter) sufficient? We tested both cameras on a TV remote and they worked just fine. Thanks

They use Victron Energy SPM150-12/3a 150W-12V Mono. Optimum operating voltage of 17.86 and opt. operating current of 8.399 A

@@josefhula9811 While I am a somewhat knowledgable tech when it comes to solar panels, my expertise ends at testing and identifying problems. I can tell you a good resource: ukposts.info/have/v-deo/cJimiamfcJummYk.html At around 7:20 ish he starts explaining what is needed to capture an Electroluminescence (EL) image. This video shows how to use a multimeter to measure volts and amps, which you can compare with the info sheet on the back of the solar panel. ukposts.info/have/v-deo/nZhnnLCEmWxqyI0.html I haven't had the opportunity to vet everything from these videos, but they seem like a good starting point. Sorry I can't be of more help.

BitDancer easy. Circle.

google hcpv

I go through the same thing. If I'm too concentrated on work or am deeply engaged in something, I don't feel like working more at home. When I am bored at work, I can't wait to come home to my projects

puffin juice it sounds like burnout to me! It happens to everyone, your best bet would be to separate your job from your hobby as much as possible. That’s not to say they cannot be the same type of work, it’s just having them be different helps keep things interesting. If you are working on one type of electronics at work do something else at home.

No it can't, a motor with a commutator acts as a dynamo ie it has a DC output. If you put a DC voltage across and alternator* it will just twitch and not rotate. Some types of washing machine pump motor will act as an alternator. * I mean a basic alternator, not an alternator with a rectifier &/or regulator built in.

Manan Varma No, it's just heated up absorber that emits light and wears off in process. After few minutes of that solar panel loses effectiveness and dependig on type and absorber it could completely stop working

@@Phantom-el6oe So, doing that isn't advisable. LOL I was thinking of doing this. Thanks for saving my solar panel :-)

Manan Varma Always to your service sir

@@Phantom-el6oe Roger That! Thank you sir!

@@Phantom-el6oe No, it's not true, and that is not how diodes generate light! If you had a GaAs or a direct gap semiconductor panel, it would glow, once you apply voltage bigger than the bandgap. But it would not emit IR. In the case of Si diodes, they will not emit light because they are indirect bandgap semiconductors.

And it's super easy to modify most webcams!

But needs IR illumination

@@sidharthcs2110 you can do that with your remote control led

No video camera will do thermal imaging. Glass lenses wont even pass the light.

This is related to resonance. My hypothesis is that if a solar panel is "tuned" (like a string instrument) to resonate at a specific frequency or wavelength, it should be very efficient at absorbing it AND emitting it. However, ultraviolet light has *A LOT* more energy than infrared, and more than visible spectrum. This is why the sun is used as source, because it generates more energy without the need for "tuning". Quantum Dots have the special ability to be "tuned" (only at build time), so if you make a QD solar panel with a lot of QDs tuned to multiple frequencies (specially UV) you get A LOT more energy than traditional panels!

Same applies to almost any component!

Also smoke emitting diode as well.

Nopparuj Oh, yeah, the SED

Yeah and after that once, it becomes a Dark Emitting Diode !!

*ElectroBoom agrees

Great question! Didn't even think of that.

Infrared LEDs can absorb a broader range of the solar emission spectrum than visible LEDs, yes. But both IR and VIS LEDs are bad solar cells.

LEDs don’t make decent solar panels. If you optimize an LED to efficiently generate electricity, you end up with a solar cell.

Filtering out visible light is easy. Just put the lens cap back on.

Yes! It's not very effective but it should work.

Yeah, though you'd need multiple LEDs to power the one LED to a good enough standard That is if you're not artificially powering the LEDs, but then again you'd probably need quite a few LEDs

Yes! It's similar to an optocoupler.

Yes but you generally need to have a lot of light shining on the first LED and the second must have a lower voltage drop. done it shining a blue LED onto a green GaAsP led and using the voltage generated to light a hyperbright red LED. You generally will have to shield the blue LED and the green one, as otherwise the light from the red is nearly invisible in the glare, the efficiency overall is so low. You also have to couple the blue and green together well, so flat top ones are best with some tubing joining them.

Wouldn't that just be using a solar panel to light an LED? Hahaha

Shorter is positive.

@@time-lapserpro4370 might wanna look that one up again. (yeah, they're reversed)

i was wondering the same

I wouldn't worry too much about gamma rays. Most PN junctions are monochromatic. They emit in a very narrow spectrum. If you can't see the light, because it's outside of the visible spectrum, you might just want to check. (I was going to say: "Look into it", but that might be a bad idea!)🤣😁😝

The semiconductor bandgap (1-10eV) limits the photons energy, so you will never get gamma photons (100keV) . The only way to get gamma or X-ray if you put millions of amperes in the diode and it explodes very violently, resulting in lots of UV photons, some X-ray photons, and maybe some gamma photons from excited nuclei.

@@neurhlp Is that what they call a gamma ray burst?🤣😁😝 As far as sending and receiving at the same time, to illuminate, you have to apply enough voltage to forward bias the diode junction. If the LED is exposed to light, than if the voltage is reduced below forward bias, there will still be voltage across the terminals. You just need to load the diode, so it stays just below junction voltage, to get maximum energy back out of it. As far as efficiency, it's actually quite high, considering the very small area of the LED Vs a solar cell. A screen has millions of them, giving them the surface area of a solar panel, and producing close to similar efficiency. The only thing that makes the idea impractical for now, is that each pixel, represented by each LED element, needs a push-pull pulse width modulator, with an inductor. The magnetics would be very difficult to scale down that many into something the size of a lap-top, let alone a smart phone. in theory it can be done, but not practical for now.

Actually, any vacuum tube diode would probably work as a photodiode to some extent, and will emit X-rays with a high enough anode voltage.

@@gcewing Won't pretty much anything emit x-rays with high enough voltage?

*Wears off solar panel that cost more than whole Christmas*

Now that would be cool.

Thank god, finally someone in the entire comment section who knows something.

Ir filter from edmund scientific.