He can talk about the benefits of the sponsors products/services as much as he wants but what sells me is the falling confetti

@syngyne

4 жыл бұрын

don't forget the smooth jazz

@limeroundup

4 жыл бұрын

Where do I get that confetti smh

@memejeff

4 жыл бұрын

come to think of it i have never sighed at his sponsorships.

@Sillimant_

4 жыл бұрын

@@memejeff it's the way he does it

@memejeff

4 жыл бұрын

@@Sillimant_ true

Someone needs to give him a noble award for the invention of the wife unit

@RhineWasiu

3 жыл бұрын

hahah

@stevenpotter8228

3 жыл бұрын

lol 😆

@davidlabovic268

3 жыл бұрын

I laught so laud at 3:34am, that i woke up my mom.

@gergodemeter5553

3 жыл бұрын

True

@theguythatlikeslegos7708

3 жыл бұрын

absolute zero

The fact he still has all of his fingers always amazes me.

@gustavotasquer7389

2 жыл бұрын

Glad i´m not the only one who thinks that

@OverlandOne

2 жыл бұрын

But, how do we know those are HIS fingers? He may have replaced the missing ones with robotic devices covered with a skin like membrane.

@PukarShiwakoti

2 жыл бұрын

@@OverlandOne look at the FUR in his fingers.

@Preinstallable

2 жыл бұрын

@@OverlandOne He’s a terminator!! No wonder why he’s so good at electronics.. He is one!!

@bruh____784

Жыл бұрын

@@Preinstallable he is a robot from the future came here to entertain us with his electric shitfuckery

I just thought I’d mention, TEC coolers are widely used within astrophotography for cooling camera sensors down to reduce thermal noise. It’s really common and they’re great. The main issue that’s showcased here, is the fact they cool *really* quickly, which can be a problem with icing over a sensor window.

@taktuscat4250

2 жыл бұрын

Increase the voltage in steps to avoid thermal shock

@BBROPHOTO

2 жыл бұрын

@@taktuscat4250 Yep, pretty much all cameras firmware does this automatically and software does incase the camera doesn’t have it built it - so it’s only a problem with extremely high humidity, which I’ve actually experienced

@hammadashraf96

Жыл бұрын

Can the TEC coolers be used to make a universal thermal cooling fan a laptop? My GPU goes to 87 °C on Max load. I'm just looking for a cheaper rig to lower my costs!

@STORMFIRE07

Жыл бұрын

@@hammadashraf96 that’s normal for a laptop, as long as it’s below 95C, it’s fine

@rtsrt165

Жыл бұрын

@@hammadashraf96 if you remove heat from TEC hot side then yes, it’s like air conditioner, heats up outside, cools down room

Linus tech tips posts a video "Bad cooling ideas" and features peltier devices. I watch the video and go "huh, wonder how these things work". Literally 5 seconds after that - notification from electroBOOM, new video :D

@tommybenny11

4 жыл бұрын

No way same just then haha

@cho4d

4 жыл бұрын

Add watching tech ingredients tec freezer 1 hour before linus' video and you have my experience. weird stuff considering how old these things are

@b-init1221

4 жыл бұрын

How is ur comment 12hrs ago?

@hirsch4700

4 жыл бұрын

@@b-init1221 patreon

@JonathanKayne

4 жыл бұрын

I thought it was an odd coincidence.

In all my years of carpentry I have NEVER seen anyone using a jigsaw while sitting

@randomaccessfemale

4 жыл бұрын

Well, you can't expect too much from a gaming channel.

@Talia.777

4 жыл бұрын

,😂😂😂🤣🤣🤣🤣

@Shedding

3 жыл бұрын

He said it... He is an electrical engineer.

@ObservingLibertarian

3 жыл бұрын

Yeah, I saw him assembling this and went "bro... fingers don't go back and even when they're sewn back on they never work as well as they used to. Put it down....."

@daniesalex7073

3 жыл бұрын

Mehdi is in destructible

Mehdi: clumsily spends half a day cutting holes into wood to mount heatsinks into. Also Mehdi: has 3d printer on back shelf.

@wlockuz4467

Жыл бұрын

Can't use 3D printed stuff when dealing with high temperatures

@instazx2

Жыл бұрын

@@wlockuz4467 Ah explains all those plastic parts that hold the plastic fans to the heatsinks in computers.

@Bud55

Жыл бұрын

@@instazx2 I thought that a specialized plastic used for computer components

@instazx2

Жыл бұрын

@@Bud55 Nope, it's usually ABS, same plastic the TAZ normally uses. luckuz4467 might be thinking of PLA, which isn't a very high-temp-tolerant material.

@Bud55

Жыл бұрын

@@instazx2 Oh I see now.

I did the crash course in peltier units too haha. I had a small water cooled compressor and used a 8 peltier blocks with individual fans an a aluminium block milled to carry the water through an chill it. Turned out pretty neat. I used a 15 am buck down for my supply and found the most efficient supply an it worked fabulous.

@femcel101

10 ай бұрын

Can use this set-up to cool down my laptop?

@supersai1919

10 ай бұрын

Can you please share the video if recorded it. And price it costs for you?

@oliverer3

7 ай бұрын

​@@femcel101Technically, yes. However a peltier is very inefficient and creates a lot of heat by itself therefore you will need a much larger heatsink with a peltier than you would without one. Peltier cooling a PC only really makes sense for extreme overclocking.

@fatfr0g570

7 ай бұрын

@@oliverer3Could also go with liquid nitrogen for cooling. In any case, the solutions available for cooling a laptop are poor compared to what's available to desktops.

@yeldarb141983

6 ай бұрын

yeah...I took a monster heatsink out of an old computer and attached the TEC where the processor would normally go, then hooked the tec and the fan from the same computer up in series to a 20v laptop power supply... I'm sure if i'd had a touch more voltage, it woudl have froze over, but it was fascinating watching it pull water out of the air, lol

*Med holding any sharp devices* Me: This can't be good.

@spugggaldon361

4 жыл бұрын

Literally watching him use a jigsaw with my hands over my face and peeping between my fingers. I haven't been scared like that watching a video before

@llearch

4 жыл бұрын

I felt the same way watching the angle grinder. >.< Particularly with the order of spin, if it had kicked back, he'd have been in trouble. :-(

@darkwinter6028

4 жыл бұрын

llearch n'n'daCorna - at least he left the guard on & wore eye protection...

@jasoncarswell7458

4 жыл бұрын

I hope he knows what he's doing. Lest we forget the utility knife incident...

@ChaseTheFloof

4 жыл бұрын

Or literally any electrical things

Your "Wife unit" explanation was amazing dude! hahahaha!

@marin.aldimirov

4 жыл бұрын

I paused the video, just to find and upvote this comment :D

@louistournas120

4 жыл бұрын

@@marin.aldimirov : A nuclear reactor is a lot like a woman. You just have to read the manual and push the right buttons. ****sips**** coffee.

@walkingstickman1

4 жыл бұрын

@@louistournas120 and you push the wrong one and they have a total meltdown too

@TechyBen

4 жыл бұрын

@@louistournas120 And one tiny mistake and it goes thermonuclear.

Basically, when the current flows through the junctions of the two conductors, heat is removed at one junction and cooling occurs while heat is deposited at the other junction.The main application of the Peltier effect is cooling. However the Peltier effect can also be used for heating or temperature control.

@KennyL-zt4oz

9 ай бұрын

o

My axiety goes through the roof whenever i see him handling cutting tools in an uncomfortable way. I’m about to have a heart attack

@notsam498

2 жыл бұрын

I think he does this in purpose for some sort of comedic effect.... It freaks me out too though.. I feel confident in the joke because he has all his fingers .... If built stuff like that all the time... Eventually you'd be missing digits.

@dannnmerkle7930

2 жыл бұрын

@@notsam498 He certainly does it for comedic effect to great success. At 7:40 I had to pause and go back. Starts a cut with drill/jigsaw? Takes the blade off a hacksaw, sticks it thru the hole then reattaches the handle to finish the cut? Lmao

On an atomic level, temperature is created by the atomic structure vibrating. This vibration is caused by all particles in the material vibrating with electromagnetic and nuclear forces. This phenomenon is most visible when atoms slow down their "spin", or internal energy, the closer they reach absolute zero. Since there are two materials with different thermodynamic properties but similar electromagnetic properties, the electrons can be shared easily between the two materials while still maintaining two different specific heat capacities. Once an voltage is applied to the two materials the electrons can flow to the material that they are attracted to. This will cause the vibrating electrons to leave one material the void of the electrons while the other material gains the vibrating electrons. This lack of vibrating electrons is what causes the electron deficient material to drop in temperature while the electron rich material has many vibrating electrons on it increasing its temperature. This is why changing the voltage will cause the electrons to travel to the opposite material but having the same phenomenon. The difference in voltage between the two materials creates a difference between the electron density between the two materials which then causes a difference in the thermal reservoirs between the two materials. This temperature drop is what allows heat to travel across the materials and electrons do not carry any of the heat themselves.

@spacejunky4380

4 жыл бұрын

Wow this cool dude. I liked when you mentioned electron voids create the "cool side." I've heard people say temperature is a measure of entropy which is an average of movement- am I right? Also, how is that converted into C or F? Why don't we just call it average speed?

@chunguskhan5327

4 жыл бұрын

Please forgive me if I sound dumb but I wanted to ask a question, since the electrons are vibrating and gaining heat, will they eventually change states?

@FordFlatSix

4 жыл бұрын

​@@spacejunky4380 Entropy could be the defined as the flow of heat between two thermal reservoirs, but this thermometric effect is what causes the difference in thermal reservoirs in the first place so there are several systems working in this example. You would need to define your system in order to define where the heat was flowing to define your average heat flow or flux. Degrees of temperature is a measurement of the material and not a amount of energy, it is a scalar value. Since heat is an amount of energy that travels in a system and not a measurement of a material property it can not be converted into a temperature. The reason it isn't a speed is because speed is also a measurement of a specific value like temperature. Heat flux has a rate and direction associated with it.

@bwannnn

4 жыл бұрын

@@chunguskhan5327 I'm not sure about that but I know for sure if it does change states it'll need a super high temperature in order for that to happen.

@greedygoblin9441

4 жыл бұрын

@Ryan Green Mass of an electron is negligibly small compared to atoms in crystal lattice... Normally heat is generated in a conductor when flowing electrons collide with atoms. Successive collision results in large momentum transfer thus atoms will more likely to vibrate with larger amplitude. Vibrating atoms which has more mass than vibrating electron is responsible for heat generation in a conductor. Secondly, If electron void is created then it'll get occupied by another electron bcoz of closed circuit connection... And if electron voids are d reason for cooling on one side, then a conductor having positive static charges also has electron voids.. why wouldn't that cool?

He actually has a surprisingly accurate idea of what minecraft is

@gamernatemoore8029

4 жыл бұрын

@@werewolfbishop5465 the only electroboomer 😉

@c0smo709

4 жыл бұрын

@@werewolfbishop5465 not a boomer

@wildkeith

3 жыл бұрын

@@werewolfbishop5465 He's 43 years old. That's not a boomer, it's Gen X

@blackmage6842

3 жыл бұрын

To be fair, Minecraft isn't that hard of a game to guess.

@geetanshgautam

3 жыл бұрын

Well he didn't burn down the shop so..

Thanks for this demonstration it was really informational

This one's for me. So the Seeback and Peltier effect works in the same way as a solar panel is like an LED. Heat is typically radiated using photons, which are emitted by any object of a certain temperature (blackbody radiation). As heat is just an amount of kinetic energy, the photons give energy to electrons, causing them to drift. The electrons, now higher energy, have a velocity. The voltage potential then counteracts this velocity, resulting in the momentum of the electron being transferred to the other conductors atoms, and the energy is absorbed by the other conductor, causing one to cool down and the other to heat up.

@dziubo1

Жыл бұрын

Oh, so for dumbass like me. Volatage acts like a stimulator for electrons - it gies them bigger capacity and allows them to dicipate heat along, py passing to another particles along wire? Is it like catching heat from photons and throwing it away?

@raajessahu6301

25 күн бұрын

Thank you very much. I had bought a peltier module when I was about 10, before COVID. I used it for few days, and then broke it to see how this magic works. But as I was in secondary school, I couldnot understand that, and thought that it's just some super intellectual scientist's level stuff. But now as I am starting my class 11, I understood it from your explanation. Once again, thank you. I am going to buy another one, but with the understanding of how it works.

11:37 - Grinder next to the balls looks scary. Fortunately this is not liveleak

@Polar_Onyx

4 жыл бұрын

Diamond Snake I'm surprised every video he's made didn't end up on life leak

@madeofnapalm

4 жыл бұрын

This is not LiveLeak YET

@UnknownPerson-nl7te

4 жыл бұрын

LOL....balls XD

@bodyno3158

4 жыл бұрын

Once get slaped badly by several dongleing wires wraped up by a running angle grinder, almost snaped my pinky finger, took months to fully recover, angle grinders are NO JOKE.

WOW cutting and drilling like that !? - amazing you still have all your fingers !!!

@TRWnan

4 жыл бұрын

Are you new to this channel?

@anggaadandiputra8450

4 жыл бұрын

Because safety is number two priority.

@guangfanzheng9837

4 жыл бұрын

Miro Kefurt you should watch him change car break calipers

@dhruel

4 жыл бұрын

I was cringing and yelling, "Aaaugh! Put it in a vice already!"

@susheemayo9348

4 жыл бұрын

@@anggaadandiputra8450 nice reference

Struggled with this for 2 months, you solved it for me in 10 minutes. Thanks!

I was always interested by those before thanks so much for doing this vidéo!!

my wife: her body is 1 million degrees and her heart freezes electrons

@squidlings

4 жыл бұрын

She sounds hot. Your a lucky man.

@ThyChancla

4 жыл бұрын

...

@Cotronixco

4 жыл бұрын

She's a continual hot flash.

@th3osl333

4 жыл бұрын

Got it

@YTshashmeera

4 жыл бұрын

sooo you don't have to pay your bills? cuz she generates power for the house right?

This is my favorite gaming channel.

@vrv3871

4 жыл бұрын

@@laimonassileika2285 *_storm the front_*

@notaweeb4177

4 жыл бұрын

I wonder how many people for that joke

@darkseid856

4 жыл бұрын

*Fire in the hole*

@te0nani

4 жыл бұрын

Gaming WEEEEEEEEEEEK!

@andrews9691

4 жыл бұрын

Can't believe 284 people have any idea why you actually said that ;b for the record ~11:30

A Peltier module consists of two unique semiconductors, one n-type and one p-type, which are used because they need to have different electron densities. The alternating p and n-type semiconductor pillars are placed thermally in parallel to each other and electrically in series and then joined with a thermally conducting plate on each side, usually ceramic removing the need for a separate insulator (Jamakandi et al., 2020), when a voltage is applied to the free ends of the two semiconductors there is a flow of DC current across the junction of the semiconductors causing a temperature difference. As the electrons travels from P type material to N type material, the electrons hop to the higher energy state hence absorbing thermal energy (cold side). Then as the electrons travel from N type material to P type material, the electrons drop to the lower energy state and hence, dissipating thermal energy (hot side)to the surrounding environment. The higher is the rate of dissipation of heat, the cooler it gets inside the chamber (cold side of Peltier module) and increasing the efficiency of the cooling module proportionally (Badgujar et al., 2015).

@christopherleubner6633

5 ай бұрын

Yup they are made of bismuth and indium doped lead telluride. In fact they are the biggest use of tellurium metal. Some newer ones are made of tin selenide which works a bit better for higher temperatures.❤

Thanks Mehdi, I always wondered about those things. Now I don't have to order them from Amazon and spend a week finding out. Love your videos and effort you put into them. Please keep them coming 😁

“Safety is the no.1 priority” Mehdi: Hold my electron

@alexanderm5728

4 жыл бұрын

"Safety is number 2 priority. First one is fun!" -Mehdi

@adventureoflinkmk2

4 жыл бұрын

More like hold my *FULL. BRIDGE. RECTIFIER.* 😂😂😂😂😂

@untrust2033

4 жыл бұрын

Hold my FBR xddddd

@laurinneff4304

3 жыл бұрын

@@adventureoflinkmk2 full fridge rectifier*

@ishashka

3 жыл бұрын

*hold my live wire

“it works like my wife. While her rest of her body is at boiling temperature, her feet are at absolute zero.” that made me laugh hard

@SF-li9kh

4 жыл бұрын

Haha. Good wordplay. Cold feet = always doubtful of something you were once sure of. Women do that

@bassam_salim

4 жыл бұрын

@@SF-li9kh thanks for explaining

@roelandriemens

4 жыл бұрын

Wonder what happens when you switch polarity of your wife...

@vishalsrivastavavishalsri92

4 жыл бұрын

I hope we could able to see more videos after this.

@CyberlightFG

4 жыл бұрын

@@roelandriemens It's easy. Use a spider.

So much appreciation for the way you diy! Man, the amount of time I've spent sawing over a garbage bin in the kitchen of my old apartment! Good stuff

the explanation of (how moving electrons through a thermocouple pumps heat) is: in order to have thermocouple u should have two different material wires and they should have different numbers of electrons orbiting the nucleus at different orbits (say 3rd for wire 1 and 6th for wire 2)..and the wires are jointed at their ends when u apply heat to the junction u r actually releases different amount of electrons from both wires and due to that difference u get the voltage difference and that is what we r using to measure temperature.. But.... when u apply voltage u r forcing the electrons to flow through the thermocouple and that is causing electrons from lower energy levels orbit to oscillate at higher energy orbits and vice versa. then an electron with its own energy is now orbiting at (Say) 3rd orbit and u put him to orbit at 6th orbit with its same amount of energy, it will oscillate much slower and the opposite will happen if an electron came from 6th orbit to 3rd... now we knew that due to applying voltage we ill make some electrons oscillate faster and the other oscillate slower and that movement is what we are sensing or detecting as heat ( higher oscillation means high temp. and vice versa).. i hope that could clarify something

That "wife unit" diagram at 0:54 had me laughing hysterically. 😂 Body >100° C Feet absolute zero.

@dfpguitar

4 жыл бұрын

the strange thing about women is that they always need everything super hot, be it showers, hearing, beds.. But they will happily be half naked in sub zero temperatures if they think it looks good.

@cubixrohan510

4 жыл бұрын

I know what he means my mom warms her feet in my dads lap if you are assign chances are you know what I am talking about

@Moonajee

3 жыл бұрын

0 kelvin

@tyler976

3 жыл бұрын

@@dfpguitar can attest

So Linus and ElectroBoom both have a thermoelectric cooling video within 24 hours.... strange. Lol

4 жыл бұрын

My thoughts exactly. And they're both from Vancouver 🤔

@AustinLepri

4 жыл бұрын

Yep I bet a lot of us were thinking this!

@darcidenzer4109

4 жыл бұрын

And they both keep dropping stuff...

@fUtal1mistake

4 жыл бұрын

I've thought about that as well. It might just be a natural way of things. Technology evolves and maybe in some not far time in the future we would see some economically viable thermal solutions based on Peltje elements, and people would be already aware of that tech. Imo, thats unlikely to be a "commercial" for it. Either way, we enjoy both Mehdi's and Linus's content, so whatever (:

@bamberghh1691

4 жыл бұрын

Electroboom and linus collab when?

This is the main reaction: p + n- > p- + n ∆h0 ∆s>0 2) p + e- + n p + n- ∆h

This had to be the best explain and application video of Peltier that i’ve ever seen

wow i feel so premium

@skybiomes659

4 жыл бұрын

How is this commented 17hours ago?????

@lancelot_dev

4 жыл бұрын

@@skybiomes659 he is patreon, they receive videos before than us

@HistoricalOlive

4 жыл бұрын

Ikr!

@samtronxindia

4 жыл бұрын

Good for you how proud

@nonametito2599

4 жыл бұрын

Haha 😆 have a good day! >.

He made laminar flow without knowing what laminar flow is, I'm proud of you man.

@sarthakbaghel8652

3 жыл бұрын

Thats all well and good until he realises turbulent is better for cooling

@gagandeepk.v.145

3 жыл бұрын

Instead of blowing invert the fan so that it sucks air through heat sinks. This provides better cooling and less complex design.

@shayanmoosavi9139

3 жыл бұрын

@@gagandeepk.v.145 Yeah like laptop coolpads.

@The_Mimewar

2 жыл бұрын

@@gagandeepk.v.145 yep!

@midgetman4206

2 жыл бұрын

@@gagandeepk.v.145 How well would a pump work? This setup is restricting flow after all so maybe a pump could move the air better I guess that might be taking it further than he wants to though, not as simple and probably not as fast

I love this -- great video! Can I suggest using a thermotransfer epoxy product like ArticSilver(tm) instead of thermal-paste. I think will provide better heat transfer and at the same time adhere the parts together. Also, possibly a closed-cell foam material as insulation -- styrofoam(tm) maybe. One last thing... not sure if you know but you can stack the peltier thermoelectric panels to improve their effect (get more temperature differences). Odd... your wife unit has the same problem with cold feet as mine... they sort of like human peltier devices. Scientific Solution: Place a small electric blanket on her side of the bed between upper sheet and blanket from her knees downward. Based on the Seebeck effect she should then generate high voltage... sparking, etc.

You have just made me realize how a cooling unit that I've been researching works, thankyou!

Linus: Thermoelectric cooling is a bad idea Electroboom: Hold my 120V AC Edit: Wow thanks for the heart!! Btw i think i found a new way of charging my phone! I can even use a wireless charging pad for maximum inefficiency!

@wreckless_-jl6uu

4 жыл бұрын

DaUHardcoreCraft i don’t get why people say these weird pointless sayings??? Lol, w/e..

@ErimlRGG

4 жыл бұрын

Um they said it didn't mean it was always a bad idea at the end of the video and then said they bought a 545W 32A one but sure...

@coffeewind4409

4 жыл бұрын

Editing removes heart oof

@Fidozo15

4 жыл бұрын

Lol what heart?

@sadekgheidan

4 жыл бұрын

Funniest thing I've read all day :)

"It *burn freezes!* " -ElectroBOOM late 2019

@gooblepls3985

4 жыл бұрын

Don't call it late

@sasdagreat8052

4 жыл бұрын

*White Kyurem used Ice Burn!* *It's super effective!*

@squiddleswooooshesjokes1678

4 жыл бұрын

It’s more mid

Very entertaining channel and very accurate of everything I've watched so far keeps me coming back for more insight and entertainment

How haven't I found this channel until today! ❤

“I am the unluckiest man alive” Electroboom: “hold my full bridge RECTIFIER”

@wolfdesign3636

4 жыл бұрын

*hold my FULL BRIDGE RECTIFIER!!!

@poppinoff9329

4 жыл бұрын

Dominik Wolf HAHAHAHA YESYES

@emransampao9730

4 жыл бұрын

is that a nerd joke lol

@mogwaisales

4 жыл бұрын

The flaw in this comment is that mehdi would never hand over his FULL BRIDGE RECTIFIER!

@mrorion4794

4 жыл бұрын

FUUUULLL BRIDGE RECTIFIER

"Such Professional, much interactive!" - ElectroBOOM!, 2019

@killianjerrr2176

4 жыл бұрын

I love when he uses the "Such" followed by the "Much". Pure Mehdi

Absolutely love this guy he is fantastic

I am working on thermoelectric generator as temperature sensor in my PhD of materials engineering... You are awesome Mr Mehdi

I learned how to operate a jigsaw even LESS safely today! 😄😄

ElectroBOOM: I wil make 16 fins for a fan by cutting a CD cover, bend it and glue it! 3D- Printer: I am a joke to you?

@midgetman4206

2 жыл бұрын

That's boring

I live in a cold climate and I have often thought of using these in an ice shanty to power lights and devices. If one were to put the heat sinks through the wall to the outside where the temperature was below freezing and have the other side on the inside where it's heated. Perhaps even directly behind the shanty stove. It should generate a fairly decent amount of electricity without costing extra energy. What do you think?

@dgsprysoup

2 жыл бұрын

Idea seems great! I think you should try and let me know, I live in a warm place but we keep the insides cool so might work out for me as well :)

@dannnmerkle7930

2 жыл бұрын

Exactly the same line of thinking I had. If you are already adding energy to the inside in the form of indoor heating and its freezing outside, theres gotta be some power to harness there.

This stuff is really cool! (mind the pun). I've seen these things used on your skin to power small devices, like medical transmitters and such. It uses the temperature difference between your skin and air to make power, and usually to charge a capacitor to boost power output, since the voltage generated by the device is so low. Therefore, uses are minimal, but as technology improves, small devices like this might be able to power much more in the future, like watches and such.

"Wife UNIT" I can't.. that was great lmao.

@HelloKittyFanMan.

3 жыл бұрын

You can't... what?

The way I understand it is that the current through the different conductors causes electrons associated with atoms to accumulate at junctions where current passes from conductor A to conductor B, while free electrons and atoms with spaces for electrons (holes) accumulate at junctions where current passes from conductor B to conductor A. Where associated electrons accumulate, equilibrium causes the rate of dissociation of electrons from atoms to be higher than the rate of association of electrons to atoms. Since electrons absorb energy when they dissociate, there is a net absorption of energy at that junction and it becomes colder. Likewise, at junctions where free electrons and atoms that can accept electrons (holes) accumulate, electrons will associate with atoms faster than they dissociate. This releases energy, causing the junction to heat up. As electrons flow one way through the circuit, the holes "flow" the opposite way, resulting in an accumulation of both at certain junctions and a deficit of both at other junctions. I believe this is only possible when one conductor has more holes than the other and vice versa for free electrons in the other conductor (ie: conductor A is rich in holes and conductor B is rich in free electrons). This is a confusing topic, and one I don't fully understand myself. There are some great explanations on a forum by the University of Illinois at Urbana-Champaign titled "Q & A: How can the Peltier effect work?" I hope this helps if you were curious!

@kimjungun4648

4 жыл бұрын

Thx. I've been looking for this. I was thinking of building my own ac and came across peltier. And if I build something I like to know how it works :)

@secretidentity5436

4 жыл бұрын

This comment should deserve way more credit

@ribqahisabsent

4 жыл бұрын

@@kimjungun4648 I'm glad you found my comment helpful! If you haven't seen it already, the pinned comment (by Tech Ingredients) on this video links to another very comprehensive explanation of the Peltier effect. Although, his explanation is different from the way I understand it from what I've read.

@InskayDanork

4 жыл бұрын

If this explanation were complete you could only heat/cool on microscopic timescales as an equilibrium between thermodynamic effects and the potential created by the charges would quickly be established similar to a space charge region in a p-n-junction.

@ribqahisabsent

4 жыл бұрын

@@InskayDanork I'll be honest, I don't understand a lot of what you wrote. My original comment was my best understanding of what I found on the forum I mentioned. I am neither a physicist nor an electrical engineer, so there are parts to it I'm not sure I've interpreted correctly. Additionally the pinned comment I mentioned in my previous reply offers a much more elegant explanation of the effect; one which makes more sense to me. Please, if you have any corrections for anything I've said I'd be more than willing to listen. I am, after all, only interested in accurately understanding this effect.

Can't believe I haven't watched this video before now. ElectroBoom, I was building something similar last year, using only 1 peltier. I love your build, you incorporated a few idea's I didn't think of. But I have a suggestion, from something I noticed with my rig. Is that if the fan is to close to the table, due to I believe eddy currents, it won't blow nearly as much air. I noticed that your fan was pretty close to the table, if you raise the leg height of your rig by maybe 1 or 1-1/2 inches, I bet it the fan would better. I'm using a Cpu cooling fan, since it already had an attached heatsink, and I'm working with only 1 Peltier. I tried using a cookie sheet like you did, but I couldn't get mine to stay as flat after cutting lol. The next Idea I had for my rig, was to use a thin copper plate, since it has better thermal conductivity than the cookie sheet. Mine never got out of the prototype stage, but this video inspires me to remake it again.

Medhi, I live in south Texas where temperatures regularly clear 110F, and our greatest threat here is not cold, but actually dying from heat. Hence we spend breathtaking amounts of money and resources down here fighting back against the tremendous heat load. Other complicating factors are that as a society we do not build our cities with any consideration for passive or natural cooling, relying purely on the electrical grid. Also, I am told by HVAC engineers, that our universal building code is only written to handle 90F to pass C of O, resulting in new buildings failing our performance requirements by 15-25F. Add to that, the compressor-run AC which is our standard weapon is incredibly inefficient, as it must take electricity to turn all its various parts and move things around that don't even produce cooling. Then there is the compounding effect, as the more compressor driven ACs we have in use in hot places, the more we concentrate the heat yet further for the entire region (and the world of course). The Peltier device is one of our great hopes in this fight, because the transformation from raw heat (which we are dying in) to electricity that can then power secondary cooling devices is so much more direct, with no moving pieces.It also has the profound advantage of taking heat (which we need less of) and producing cool (which we need more of) without a waste stream of heat being blown out of 1.5 million windows. The problem (as Robert Murray Smith pointed out), is that they are cumulatively far too expensive to be viable in any great application as they now exist. What we need is an entire second roof of Peltier, which takes the blazing heat differential (absorbing the first volley of heat of direct sun), and converting this into voltage which can then run electrical cooling devices. (more direct and with higher yield--we hope--than taking the usable light through a solar cell and processing it into electricity then used for cooling...again, with heat exhaust.) We need a FAR more cost effective solution--10'x10' Peltiers, Peltiers the size of train stations and Wal-Mart roofs and Coca Cola plants--in order to stop the cycle of heating-for-cooling we currently practice.

It looks easy on screen, but doing all that is really hard and can be frustating. U don't give up and go through it. I like that👍

@TechnologistAtWork

4 жыл бұрын

They're both Canadians, so 8 guess the technology just got here.

@thecraftsman8083

4 жыл бұрын

His peculiarities seems a lot mental... Mehdi's seems a lot physical...So yeah both of them are great

@TechnologistAtWork

4 жыл бұрын

@@thecraftsman8083 did you just reply to yourself with something completely out of context?

"Full fridge rectifier!" Eh? Eh? No? No one laughed?

@34gw68

4 жыл бұрын

He..

@HansLemurson

4 жыл бұрын

I get it!

@camilonieto3221

4 жыл бұрын

Hahahahaha.... Get out

@user-me7hx8zf9y

4 жыл бұрын

**ha. ha. ha. ha.**

@FrostFloop

4 жыл бұрын

lol so funny i want to die

Thanks I love watching your videos because you make me joyful and I smile. I wish I knew you in person.

this gives me so many ideas

You should make a generator powered by a Stirling engine

@vedantchaudhari7123

4 жыл бұрын

he should totally do that!

@octane613

4 жыл бұрын

One of the big car brands, can't remember which, did this back in the 80's, they had a prototype Stirling engine and heat source, and managed to drive an actual pick-up truck with it. It's difficult to get power out of Stirling engines, but can be done

@octane613

4 жыл бұрын

www.stirlingengine.com/why-not-popular/ found an actually amazing article on all the different ways they tried to use Stirling engines.

@kruemmelbande5078

4 жыл бұрын

Those things cant move much mass

@octane613

4 жыл бұрын

@@kruemmelbande5078 they can when designed for it, read the article I posted.

Me : Finally Created a blinking led. Electroboom: Making phone charger with hot water. ._.

@digistealth

4 жыл бұрын

Also ElectroBoom: I'm about to charge this man's phone.

@TechnologistAtWork

4 жыл бұрын

I guess this is a gaming channel. You play with electricity.

@123zarapop

4 жыл бұрын

We all start somewhere

@TheEpicLinkFreeman

4 жыл бұрын

you don't need to create a blinking LED, they sell them. www.amazon.com/EDGELEC-Blinking-Diffused-Flashing-Resistors/dp/B077XCM7QZ/ref=sr_1_1?keywords=blinking+led&qid=1568770119&sr=8-1

@JaviandroStudios

4 жыл бұрын

Hey! Don't let that let you down! I'm sure he felt the same way at some point. You can do it! I'm rooting for you!

7:41 RIP Canon t4i

Ur video is so good , with gud experimenting . Loved the full video

In material, there are two ways of conducting heat, the first is by harmonic vibration of atoms (phonon) and mostly by charge carrier (either delocalised electron or hole). the charge carrier concentration determines whether material act as insulator, semiconductor or well conductor. A conductor is bad for a thermoelectric device, why? because thermal conductivity will also be high (Wiedemann-Franz law) which makes heat source and heat sink temperature promptly homogenise. What you want is a very good electrical conductor (good charge pump) but the very bad thermal conductor. Which is a dilemma since thermal conduction also related to charge-carrier concentration and related to, well electrical conductivity. that's why at the moment, the efficiency of a thermoelectric device is quite low. And with the electrical current flow, there is irreversible Joule heating (current square*electrical resistance), that's why you observe an increase of temperature of both sides. But Seebeck coefficient of the material/device (dV/dT) makes the temperature gradient stay the same as long as the voltage maintained. Maybe, use high voltage but low current to minimise Joule heating? (of course, the refrigeration will slow down as well. The thermoelectric device performance is measured with Power Factor, but power factor could be different in different temperature, so it is compared with Figure of Merit (ZT) which takes into account Seebeck coefficient, electrical conductivity and thermal conductivity and the temperature where it measured. Achieving efficient thermoelectric material is difficult, it is easy to get a really bad one because it is easy to get good thermal and bad electrical conductor but not the other way around. One method is to use a Phonon Glass Electron Crystal (PGEC) concept which is by selecting a material with bad crystallinity (near amorphous, lowering phonon conduction) but a good conductor, such as clathrate materials, Zintl or material with big unit cell and many many atoms in it.

@disgruntledegghead6923

4 жыл бұрын

So to sum it up, were a long way from cheap refrigeration. Stick to a thermally inefficient refrigerator for the next few years.

@nickheredia1341

4 жыл бұрын

And yet, diamond is a good thermal conductor and an electronic insulator. Why do I feel like the solution is some exotic carbon allotrope that will be discovered in minute quantities, be heralded as a green energy solution to produce electricity from heat, then never leave the lab?

@jeffreyblack666

4 жыл бұрын

The problem is that you can't choose voltage and current like that for a given element. If you want to drive it at a high voltage it will take a certain current to do so based upon the properties of the materials used. The best you can do is quickly switch it on and off.

@subesube040

4 жыл бұрын

@@nickheredia1341 good example of a bad thermoelectric material! diamond is of course really bad one, just like ruby or saphire (basically Al2O3 with some dope in it). A really good thermoelectric material, for example, Bi2Te3, but again, bismuth is poisonous and Te is just expensive, so mass-producing this material will cost a fortune. the problem is sometimes the mass production of the material, sometimes its just expensive to produce, the unconventional method, or maybe its just the media that blow it up so much.

@subesube040

4 жыл бұрын

@@jeffreyblack666 Good point! the overall device will, of course, have a "resistance" at a given temperature which basically the ratio between the applied voltage and the corresponding current, so yes i don't think playing with voltage and current will reduce the Joule heating that it will produce. Eventually, the Joule wins

_"Health & Safety"_ is not really observed on this channel. It's why I subscribed

@Talia.777

4 жыл бұрын

🤣🤣🤣🤣🤣

@laurinneff4304

3 жыл бұрын

Of course, this is not the health and safety channel on the Wii so why would we find health and safety?

@jayc2469

3 жыл бұрын

@@laurinneff4304 You apparently don't grasp the concept of _Irony_ in your neck of the woods

@jayc2469

3 жыл бұрын

@@laurinneff4304 I'm not typing any more after this but if you *read* what I have typed, you wont see any trace of me calling this a 'Health and Safety Channel' anywhere. I observed a *lack* of H&S. _....Yawn

@DANTHETUBEMAN

3 жыл бұрын

Slingshot channel also

@Electroboom I think that the peltier effect ( cooling effect upon application of electricity) is due to the conduction bands of 2 different materials being slightly different from each other, We can try thinking it through with the example of an electron moving from a lower conduction band to a higher one. So if an electron is trying to move from 1 material to another, it will need to jump to a higher energy level, total energy is equal to kinetic + potential energy. The potential energy gained by the electron has to come from the previous material’s particles But since the inner shells should already be filled, none of them should be giving out energy by decreasing their energy level, thus only kinetic energy in loss. Meaning a very small temperature drop would be measured. This is just from what I managed to read online, I do not have much knowledge about conduction bands, but hopefully this helps :)

Very good working Sir 🙂 nice style Thanks for sharing 😊.

How long did it take for him to figure out he is running a gaming channel?

@gypsycheck7973

4 жыл бұрын

meabbott wait what?

@BaltimoreShipspotting

4 жыл бұрын

@@gypsycheck7973 Reference to a moment in the video

@bibasik7

4 жыл бұрын

@@gypsycheck7973 11:23

@terminator_boy1614

4 жыл бұрын

Is he

8:33 "The fan will blow up directly into the heatsink." well, this is electroboom, everything explodes :)

@WilburJaywright

2 жыл бұрын

Literal lol! 😂

I've been working with solid state Peltier devices for over 15 years. They are used for sample gas coolers to remove condensation from a gas sample stream for emission analyzers. They are very reliable and can be used in place of a compressor cooling system. The best way to control them is to use PWM . They must be mounted to a heat sink. The life will be shorten significantly otherwise. We've used an AD595 IC with a thermocouple as a feedback loop in the past. A thermistor with a digital control loop is the newer control scheme, but still PWM. You can also stack the Peltiers to increase the heat or cooling capability.

@Tommy_Mac

Жыл бұрын

@@thefalseshepherd3689 they are stacked cold/hot, cold/ hot. The cold side faces the hot side of the previous Peltier. The wattage of the secondary is higher than the primary, but I doubt that matters too much. I hope my description makes sense to you.

9:32 yeah you just made a turbo-charger -- this is what they use to get maximum airflow into the engine....by creating a vortex.

Your segues into sponsorships are on par with Linus! _"Speaking of sponsorships, _*_D Brand! "_*

With the cold generator you created you could build a cloud chamber: a particle and cosmic ray detector.

@clementpoon120

2 жыл бұрын

aaaaaand he did

@randommosaic7080

2 жыл бұрын

Yeah same as homi Jehangir bhabha did

in semiconductors electron needs heat to be able to leave the Si crystal and move freely causing a gap in it ( which is the current definition ) so when force it to move it takes heat and transfer it into kinetic energy (which causes cooling in one side ) and when it reaches the other side of the crystal it occupies a gap transferring its kinetic energy again into heat ( which causes heating in the other side ) and thermoelectric devices work in reverse too generating electricity.

Thanks for creating this video. Everyone posts videos on why peltiers don't work to create electricity. But no one actually shows it not working. And some people post hours of commentary about what efficiency means rather than showing it.

Is no one else impressed with this man's jigsaw skills dude free hands a near perfect circle

Tech Ingredients has a great video for this device where he builds a fridge with it. Also his channel is understated

@gifzilla1818

Жыл бұрын

This is the answer we needed.. so understated, but drink coffee before you watch, his voice is laced with sleep inducing vibrations

Wow ! What an amazing, detailed, and funny lecturer ! I like you soooo much, Could you please post videos about PLCs

I've watched this a dozen times.....to watch you drop stuff 😁

3:18 the 2 different couples which are in serious have different energy levels (the n-doped couple has a lower energy level than the p-doped couple), so the one couple is at the same temperature jumping between higher energy levels than the other couple. If you put a current to the peltier device, the electrons will move from the one couple to the other, and when an electron is moving from the n-doped couple to the p-doped couple, it must increase it's energy level, and so it must take out thermal energy, and as a consequence of it, the side get's cold. If the electron now moves back to an n-doped couple, it must submit the thermal energy again, because the n-doped couple has a lower energy level than the p-doped couple, and in consequence of this, the other side gets hot. I hope I could explain this, that you understand it.

8:33 "the fan here will blow up" On this channel, I have no reason to doubt that statement 😉

@prateekpanwar646

4 жыл бұрын

@@spaghetta5497 Thio Joe is biggest liar. It made many people's ethernet cable and ruined many people's PCs. +Nothing wrong in emjoi until people put random emoji 110-60 times which doesn't even make sense and putting over exaggerated emoji like . 1: I'm feeling sad a bit 😔 2: I'm sad a bit 😱😱😓😨😰 2nd over exaggerated and it looks shit.

@mataco7073

3 жыл бұрын

@@prateekpanwar646 😎😎😎👌👌👌👌💯💯💯💯😂😂😂😂😂🅱️🅱️🅱️🅱️

@cessposter

3 жыл бұрын

@@mataco7073 🔫 👁️👃👁️ 👇 👄 your toes, hand em over.

@mataco7073

3 жыл бұрын

@@cessposter no

3:20 I can assume thet the state of constent vibration on the atomic level is changing and slowing down the atom vibration das simulating the effect of colling by slowing down the movement of the attoms

5:20 seems like the simple/cheap/fastest way to get a huge temp drop on a peltier device for the cold side, could the opposite be true for the electrical production? Meaning use boiling water with that heat sink stuck in the boiling to produce electricity, using the pan with that metal sheet is an inefficient heat transfer compared to using the blue heat sink. Surface area seems to be the key and that heat sink makes use of a lot of surface area water can pass through quickly.

9:50 I saw you 3D Printer, you could jsut use it to make a good mesh

@RishabhTatiraju

4 жыл бұрын

I thought the same lol. But I guess it was to ensure structural integrity of the mesh. Plastic would probably melt or lose shape in all that heat. Maybe.

Indeed, the TEC peltier devices are good for cooling, and the TEG devices are good for Voltage generation when heat is applied to them (up to 4.8V with a 100°C difference between both sides). Thank you for the video! The structure you built and the materials you used are very useful info! :D

@weslingm

3 ай бұрын

A one hundred degree difference can easily be achieved with a wood stove.

You could create a box with two compartments. One that cools down groceries and one that heat up water on the other side for tea or coffee. Than the efficiency is not bad.

I love it, when he makes cool stuff while totaly ignoring safety issues. Great video!

@a64738

Жыл бұрын

In this case cool AND actually cool as in cold :)

So wait you can like make a mini water dispenser with hot AND cold? Nice.

@curtheisler1200

4 жыл бұрын

That's actually a neat idear ya got there

@TheHerobrineKiller

4 жыл бұрын

Someone might do it

@Stonemonkie1

4 жыл бұрын

Would stacking the devices work?

@edwatts9890

4 жыл бұрын

@@Stonemonkie1 Yes.

@FixitFox

4 жыл бұрын

That's how most water dispensers work already. They use the peltier module to cool the water. Not sure if they use the hot side for heating or just reverse the polarity but yeah. Unfortunately the idea is already being used. Nice idea though

How it works on atomic / quantum level? I can imagine situation as follow. The flat surface with current connected to opposite sides of the surface causes the flow of electrons. But due to the shape of the surface, the electrons create circular current movement - as in the coil. This circular movement also causes the magnetic field to "move" as in the coli perpendicular to the axis of the circular current. But what is different, that in the coil you don't have any obstacle on the way of the magnetic field (the interior of the coil is empty). Here you have the surface which is affected by magnetic field. Here are only my imagination further: the magnetic field slows down the frequency of the electromagnetic radiation of the surface (cooling) on one side and speeds up the frequency of radiation on the other side (heating). I can imagine this as an item positioned in the wind - it will get cooler faster because the "wind" is taking the energy from the obstacle. In case of your experiment, the "wind" is the magnetic field. And the energy is given back on the opposite (heating) side of the obstacle. Probably this could be proven experimentally by placing the same shape in the middle of the coil. If it cools down and heats up then this is the case. Please let me know what you think about it :)

@stevenpotter8228

3 жыл бұрын

good explanation!! Get this to the top so people can see it

@Alienami

2 жыл бұрын

I assume it works like laser cooling does, which is how they get the record lowest temperatures. Basically... By adding and removing energy at the right time, you force it to shed heat and get colder. So, I imagine this device is like a microwave for atoms in the circuit... Forcing one side to get cold and the other to get hot by making them gain and shed energy. There is a similar effect in Thermo Acoustics, where you can turn a flame over one end of a tube into vibrations in the tube from air moving from sound waves in tube then the tube makes different hot and cold sections until you have the output reach the other end of the tube... Either hot or cold depending on tuning of the glass tube and amout of heat and all that. May help to have an analog computer to tune and play with.

@przemyslawkroliszewski2322

2 жыл бұрын

@@Alienami Cooling by the laser is working in similar way to slowing down the pendulum. If you put the right force in right time it will slow down. The lower the vibration the lower the temperature. So, yes, it generaly slows down the vibration of particles in the one side of Peltier device and speeds up (to keep the balance) on the other. The sum of temperatures should be zero. Isn't it?

@ElectroBoom, This is a suggestion. Can you arrange those thermoelectric devices in series and try to achieve the absolute 0 temperature?

@SAPERE69

Жыл бұрын

I have a feeling that, based on the demonstration in the video, if you did what you’re suggesting then the hot side would get too hot and the device would just burn up. The colder one side gets, the hotter the other side is, I’m pretty sure. That means that if you’re exponentially cooling in series then you’re also doing the inverse and mr electro boom himself almost burned one device just from powering it up fully without a heat sink. There’s probably other problems I can’t even think of or maybe I just have no clue what I’m talking about but I doubt that what you’re saying is possible.

@DamiendraBuwaneka

Жыл бұрын

@@SAPERE69 That is exactly why I like to see @ElectroBoom try that 😀

@SAPERE69

Жыл бұрын

@@DamiendraBuwaneka I see lol I’m that case: great idea!

I'd try turning that fan around, so it pulls air through the heatsinks instead of trying to push air through. I built a humidor that uses 6 peltier junctions ( 4 cooling, 2 heating ) to maintain my cigars at 69 degrees. I machined all the heat sinks using a cnc router. The hot side is huge, 4 inches on a side, and each heat sink has a PC style fan drawing air through the fins. The cold side heat sink is only slightly bigger than the peltier unit, and has a small 12v fan, also drawing through the fins. I use a PID controller to PWM the power to the devices with a 1 degree hysteresis. When building everything, I experimented with the push-pull fan configuration, and the pull configuration is easily more efficient. The best I can get though is about 40f between the hot side and the cold side.

I just bough a Thermo Electric Mini Fridge for my computer desk. I was curious about how it works and ran across your video. Thank you for the entertaining and informative video. :)

He does a lot for his patreons unlike others who just milk them for money. That says a lot about the kind of person he is and his mindset. That's how you grow a loyal community. Kudos to this guy.🙏

@grande6075

2 жыл бұрын

True indeed

@hitechinc.7875

Жыл бұрын

I agreed

@2Sorts

7 ай бұрын

This is very true. Take, for instance, technology connections. He’s recently hidden the dollar amount he receives, likely because he’s getting slightly embarrassed. Before he did that, I noticed he was drawing well over 120K a year from Patreon alone, never mind money from views. Medhi here regularly buys bench power supplies, scopes etc just to give away.

The best explanation I know of what's going on on an electron level is a bouncy ball analogy. Imagine you drop a bouncy ball and how long its bounce is its temperature while the height of the bounce is its energy. So if you drop it from 2 meters from the ground we'll say it has 2 meters of temperature and 2 meters of energy. But if you put a 1 meter table in its way now the temperature is just 1 meter despite still having 2 meters of energy. Now comes the important part. Imagine that electric current is sideways motion of the ball. So when you drop it from above ground to above table it will start with 2 meters of heat and energy but the moment it starts bouncing on the table it will have only 1 meter of heat despite still having 2 meters of energy. The real effect to my knowledge is that the thermocouple materials have different electron counts and levels so when an electron from a high level is forced to jump by current to a low level of the other material it dissapates the energy difference of the two levels in the atomic core which makes the core vibrate harder which is heat and vice versa.

Energy levels of different materials, like a diode or photovoltaic but for heat transfer. Phonons vs electrons moving around

My understanding is that heat is composed of 2 parts: atomic vibrations and vibrations of electrons that conduct electricity. One side of device is semiconductor with big electron potential energy and the other has low one. But they both have the same kinetic energy because they're at the same temperature. So when they two come in contact, potential energy is different, So electrons move from high potential energy state into a lower energy state from one semiconductor side to the other. So one side now has less electrons, aka less heat, while the other one gets hot electrons which because they came from higher potential energy state, release their energy as more heat. In essence, hot electrons physically move from one side of device to the other. When you put electricity through it, you are using voltage to move more electrons from cold side to the hot side. Electrons move from higher potential energy to lower one. Effectively, removing hot electrons from cold side and depositing them on the hot side. When you do it the other way around, you are pushing electrons from low potential energy to high potential energy. And you move hot electrons to high potential energy state. Hot electrons loose their kinetic energy, or their hotness which gets converted to potential energy. Now thermoelectric device has many of these junctions. Here's a little map to understand it better: HS - high potential energy semiconductor LS - low potential energy semiconductor ^ - wire up _ - wire down HS^LS_HS^LS_HS^LS_ so as you see, if electrons move from left to right, high potential energy hot electrons will deposit heat on the up side of low potential energy semiconductor. Then low potential electrons will move from down side to high potential energy state and will get cooler by loosing kinetic energy and transforming it to potential energy. So in this configuration, thermoelectric device will get cold on it's down side and get hot on it's up side. And when you put electricity in reverse, same thing happens in reverse. Low potential electrons ho to high potential through up wire and reduce heat on up side, and high potential electrons move into a low potential state through wire downwards, creating heat downwards. This is my understanding from places like Wikipedia and other sources. Important to note that this is not the same potential that comes from things like conduction band and valence band. It is some sort of affinity towards electrons that changes with different temperatures. I hope my explanation made sense.

Awesome video. Had me rolling at the wife unit. Really nice how you put 9 of these together. The generator application is pretty cool in theory too! Thanks!

I watched your videos growing up and these videos were always in my electrical engineering lectures! lol

Applying electricity can cause cooling because there is a net movement of charge carriers away from the side that is cooling down. Both electrons and holes are pulled away from the cooling side by the current flow. A net movement of energy carrying particles away from a surface must cool it down. It's weird to consider the absence of an electron as an energy carrying particle, but in the context of doped semiconductors it works. The alternative is trying to model the movement of all the gazillions of densely packed electrons, which is both A) hard, and B) ultimately cancels down to the movement of an electron hole anyway. The build up of heat on the other side does eventually result in a diffusion of charge carriers opposed to the current flow, which is why the temperature difference maxes out. The absolute temperature continues to increase through resistive heating and other effects.

3:18 - Spin caloritronics is a relatively new field of research and focuses specifically on the interaction of spins with heat currents, motivated by the continuing discovery of new thermoelectric effects. Two of the most fundamental thermoelectric phenomena are the Seebeck and Peltier effects. These effects couple heat, charge and spin in magnetic materials. The Seebeck effect describes the direct conversion of a thermal gradient to an electric voltage. Conversely, the Peltier effect is a temperature difference developed across a material in response to an applied voltage. At the atomic scale, this corresponds to an applied temperature gradient causing charge carriers to move from the hot to the cold side of the material, inducing a measurable voltage.

10:57 PIECE OF SHEET

The Seebeck effect is caused by two processes: diffusion of charge carriers and phonon drag