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Linus this is the most expensive fan in

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our office more expensive than all of these combined and this one's 250

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dollars right now it moves like no air is this

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honestly I was

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this is without a doubt the strangest most expensive most Niche fan that we

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have ever seen and I cannot wait to tell

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you guys how it works after I tell you how to make money on YouTube PDQ take

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Patch management off your plate by automating the snot out of it PDQ can

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keep your machines patched and up to date automatically giving you time to do

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more important things like watching Linus Tech tips start your free trial at

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pdq.com Linus hey Linus are you okay to

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be shocked for science

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I mean what choice do I have at this point I mean a lot of people fantasized

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with physically harming their bosses to understand the principles behind this

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strange little fan first we need to have a little chat about piezoelectrics a

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piezoelectric refers to something that is able to turn mechanical energy into

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electrical energy or vice versa piezoelectrics are all around us from

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the quartz crystal that keeps time in your watch to the stylus of a record

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player or even the switch of this lighter the way this guy works is

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there's a spring that compresses when I push down the switch then when it hits a

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certain point all that spring energy gets released ah a small Hammer hits

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this piezoelectric Crystal resulting in and this can work the opposite way and

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turn electrical energy into mechanical movement so inside this fan there are

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two piezoelectric ceramics that are sandwiched together one that contracts

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with positive voltage and the other that contracts with negative voltage that

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means when you plug it into the wall the AC power will make it start to vibrate

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let's do that how does this have no specs on it is

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that even legal it's fine well what voltage does it run

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at 120. this is one these vibrations are

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very small which is why the very fact that I'm holding it dampens them out so

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much that you can barely even see that it's moving but if you place it in

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something more rigid or even hold it a little tighter

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oh that's because the blade had to be

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very carefully tuned so that the natural frequency matched the input frequency

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and it has to be matched within a couple of Hertz Ah that's why we need this

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power supply instead of just running straight off the mains your Mains power

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can be kind of all over the place to illustrate the importance of this think

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of the blade here kind of like this washer on a string if I just randomly

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move my hand around the washer barely moves we're not blowing any air with

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this but if I time it correctly I can

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get the washer going pretty good that's because I'm matching my input to the

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natural frequency of this system same principle here so the size and weight of

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this blade has to be carefully tuned or

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it will barely move which actually means that this one here won't work in Europe

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because here in North America our wall power is at 60 hertz and in Europe it's

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50. they actually tried tuning the blade to somewhere in between but it has to be

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within about one or two Hertz for it to work it's hula hoop an elementary gym

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class all over again really I have no rhythm sorry but your your waist

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what are you saying what all right where

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do you want this masking tape just right on the end somewhere it doesn't really

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matter it's like a big old whack of it or like I don't know I haven't tried

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this yet oh I see maybe it'll work way better okay I think that what I'm trying

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to do is increase the surface area all

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that you're trying to do is just knock it out of natural frequency oh I see

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well all right there will that be enough oh it still seems to work pretty good

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that's way less than before though I want to touch it can I touch it you can

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touch it

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all right we have a job to do 0.55

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let's go back just that tiny little bit of masking

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tape and then try it again whoa whoa Nelly now it's almost an inch

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that's double with just that tiny piece of tape so we're basically paying for

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some master Piezo Craftsman no we're

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paying for it they only make a couple of them a year that was later in the script

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but like you know now before we go any further this is more than just a party

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trick and blowing air by waving a piece of fiberglass around has a couple of big

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advantages first of all there are no wear surfaces I mean sure this fan has

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high quality bearings that'll let it spin for a while but eventually it's

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going to seize up noctow rates their fans at about 150 000 hours of operation

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or about 17 years that's not bad but the

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folks over at piezo.com had one of these babies nailed to the wall in 1982 that

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ran non-stop until 2008 with the only

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required maintenance being occasional dusting oh yeah and actually it was

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still fine after those 26 years they just moved offices and figured the poor

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thing had had enough another key Advantage is dust management if you were

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in a clean room for instance and you had a fan like this running it would shed

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tiny Trace Amounts of oil and dust into the surrounding environment this on the

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other hand sheds absolutely nothing an even bigger benefit though is power

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consumption this tiny 40 millimeter fan is rated for 0.5 Watts which when you

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factor in the inefficiency of converting AC to DC power lands us at about one

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Watt that's about as low as you can get with a traditional fan our piezoelectric

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fan on the other hand gets most of its motion from hitting that natural

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frequency making it incredibly power efficient I mean think back to our

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washer again what's more efficient going like this

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or going like this this one is rated for 100 to 200 milliwatts but unfortunately

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we clearly don't have the resolution to measure that so we're going to move on

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to our next station which is testing its performance compared to this boy can you

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see this okay or do we need a black background here see it but black background might be better you know what

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I have an idea how about this LTT Store backpack we're going to have four waves

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of availability in the coming weeks so make sure you get your order in so that

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you are in the queue

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oh wow it really goes doesn't it I

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didn't think I was going to get that much airflow out of it you can really see a night and day difference between

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it being slightly behind the fiberglass

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Reed and then right next to it so that's clearly where the intake is like right

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along the sides here that's so bizarre

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the air current is so much greater than what it feels feels like

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be freaking blowing this into I can't even feel it in my notes it says it has

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essentially zero static pressure and needs free air around it to bring in

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it's not actually like a normal fan but this still even though I'm reading that

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off a teleprompter I don't get it how can something blow this much air and yet

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I cannot feel it at all like there's no pressure like I can but barely okay well

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let's just compare it to this sure a 40 millimeter it's gonna get absolutely

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annihilated Noctua would never let us down yeah my cost performance analysis

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is that this is probably better for most things

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don't need the lab to tell me that no no you're good you're good

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yeah I could get into incense if it's always like playing around with cooling

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fans you're with it uh technically the steam

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deck is a computer and it is one that we already managed excellent results with

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using a 40 millimeter cooling fan so will rpa's electric fan be a suitable

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replacement I suspect no but

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um we're gonna give it a shot anyway Alex how the hecking okay this is pretty cool

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I might want to turn it off first no no it seems fine I'm turning it off yeah

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that's probably for the best you don't need to undo it that much I had it undone so it would be like perfect you

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could have just slotted it right in oh valve steam deck now with three thousand

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percent more vibration how much does that fan make the bomb go up Ah that's

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pretty good though I mean it's uh fairly lightweight you know bud low power yeah

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low power which is really important in a in a mobile device you get to plug it

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into the wall oh yeah no no we couldn't run this off of this steam deck battery

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because it's AC you can get lower voltage versions that would probably

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work back oh God so there's part of here

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no I'm not even what that do you know how to hold a steam bag okay yeah maybe

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this one oh my God Alex you knew you were gonna do this didn't you oh my God

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okay let's not do that you just clamped onto the screen of a steam deck do you

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know how few working steam decks there are in the wild none work better than

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this one so don't ruin it this is the

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best cooling solution we've ever had on this steam deck it's the worst one so

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low power while I tool around and do maternal to

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heat this boy up Alex is going to explain more about the construction of

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our piezoelectric fan our goal is less than 63 degrees which is what we got

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with our 40 millimeter Noctua it's basically just a circuit board fiberglass you have your two

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piezoelectric Ceramics which are just thin little things instead of putting

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copper in your circuit board you put those in smack it together whole thing

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sorry I didn't mean to interrupt if they made a lot of them could be very very

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cheap yeah I was going to say so what's the issue it's the Precision manufacturing or no uh just they make

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very few of them they actually mentioned that they really like it when videos like this come out because a bunch of

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people buy them just for tooling around with them like us apparently there are a

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few on the space station which is pretty cool because while on Earth convection

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happens naturally when air gets hot it gets less dense it rises letting cooler

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replace it in zero gravity though that hot air just stays there around whatever

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is producing heat so a piezoelectric fan is a super low power way to simulate

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convection in talking to me day though they were like yeah we have some fans

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deployed for zero gravity but those volumes are so low it can hardly allow

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you to run a business fair enough quite a few then are also

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used for sensors like temperature sensors smoke detectors chemical

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detectors and so on and so forth by gently moving air across the sensor you

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can significantly reduce how long it takes for something to get detected and

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once again the super low power draw means that a sensing unit can be battery

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powered one other benefit this fan has over a traditional fan is the start and

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stop time it is blowing air within

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milliseconds of being powered on and stops almost instantly when power is

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removed and one situation this can be very useful is for lasers this is the

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chiller that keeps our laser tube cooled but even though it keeps our laser tube

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within a couple of degrees on etching jobs a couple of degrees can be enough

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to noticeably change the darkness of the Etch in some highly Advanced lasers then

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they'll have both heaters and these fans

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to control the temperature to within one hundredths of a degree and finally they

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do get used to cool Electronics just not

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in this application now we actually maxed out at 50 degrees Celsius on our

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CPU I have no idea how that works maybe

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we're utilizing more of the heatsink well but also like our other fan it was

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off the whole time oh damn yeah like it's actually working pretty well

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normally not in an application like this though normally in a sealed container

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just to create a any bit of airflow for the poor low power chip that's going to

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the deep sea or somewhere equally unpleasant for electronics you know

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what's never unpleasant though my Segway to our sponsor

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enjoyed this video and you're looking for an equally exotic cool solution go

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check out our Vortex cooler video it's mind-blowing I still have no idea what

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happened there