Worth noting: at 2:50, you say the mains power can be all over the place, but that's not at all true for frequency. Mains frequency is very tightly controlled, and basically never deviates by more than 0.1Hz. Large frequency deviations would cause huge blackouts and enormous problems with the grid. In addition, if that wall transformer were actually controlling frequency, it wouldn't have problems running in Europe either. My bet is that it's just a transformer.
@NanoMine2 жыл бұрын
Yep, I too think it's just a step down transformer to make it safe. Edit: Thanks to a comment below, I found the diagram for 120v 60Hz supply and it's a current limiter with surge protection. Whereas 240v version was a bit different to accommodate for the highest voltage range.
@twizz4202 жыл бұрын
Yeah, I was going to say it's more likely that that dinky little thing just can't handle mains voltage, which is why they have the transformer on it.
@Ladioz2 жыл бұрын
Not sure why you would comment that. If Linus wasn't sure about it he would not do the video. He isn't wrong here
@mehmetfrataydn53042 жыл бұрын
Probably that's it, fan makes a ~120hz sound
@rednecktech94852 жыл бұрын
@@NanoMine Almost certainly
@freazyknight2 жыл бұрын
I used piezoelectric transducers in my thesis for water distillation desalination. It creates waves , which cause water to evaporate creating bubbles ( cavitations ) . Those bubbles also burst ,which is great because water becomes atomized increasing surface area ,which means even more evaporation rate increase. You can read this water phenomena. It is a huge problem for rockets since it can damage places that has water.
@Matty.Hill_872 жыл бұрын
That's some seriously clever stuff
@freazyknight2 жыл бұрын
@@Matty.Hill_87 yup it is awesome but now i have ptsd from water leakage 😆. Had to make.my own lap from scartch. Lots of leakage silicone and gaskets. All custom made by me. (Except for ultrasonic/piezoelectric transducer).
@krishnayashas83602 жыл бұрын
Got any links to those research papers. I think concepts very interesting and would love to check it out
@Shinobubu2 жыл бұрын
we use Piezoelectric transducers to make fog machines its neat. and cheap to make..
@Felipemelazzi2 жыл бұрын
@@freazyknight Thank you! You got me interested now
@bigclivedotcom2 жыл бұрын
I have a dual version of this in a suitable protective housing from decades ago. I think it uses 2 piezo blades in series for direct mains operation. I'll have to try and find it. (It was from a surplus store.)
@wangchi623 Жыл бұрын
If anyone would have a spare of these, it's you, especially one as unique!
@aaronmdjones2 жыл бұрын
2:40 The frequency of mains power isn't "all over the place". Here in the UK (50 Hz), great effort is expended in order to keep it between 49.9 and 50.1 Hz at all times. If it drops to 48.8 Hz (because the demand is exceeding the available supply, stealing rotational inertia from the grid's generators and slowing them down), they immediately start rolling blackouts (the Low Frequency Demand Disconnection scheme) in order to restore it. We're talking a couple of seconds between reaching 48.8 Hz and 5% of the country going dark. It's perfectly acceptable to rely on mains frequency being somewhat constant, and some timing devices do.
@Jameswrightdavid2 жыл бұрын
Ovens often use it for their clocks
@iyziejane2 жыл бұрын
It's a similar fine tolerance in the USA and Canada. Consumers would have noticed variance in the frequency during the days of CRT televisions and monitors. Linus is thinking of the mains voltage which does generally vary too much for electronics and is part of why they need power supplies.
@AndrewStrydomBRP2 жыл бұрын
Also, even more effort is made to make sure that overall it averages to exactly 50hz, so if the freqency drops and they have blackouts, or sits on the edge of the blackout territory for a while, they will actually run it fast when they can, so that it can catch up.
@Bobby11 Жыл бұрын
alot of older wall clocks use the frequency to keep time. thats why they monitored the frequency and if it dropped or went higher, they would compensate later to correct clocks. it might still be the case noq
@ZesPak Жыл бұрын
@@Bobby11 wall clocks? On mains power?
@nwheatcraft2 жыл бұрын
The air crossing the heatsink is more affected by the venturi effect with the piezoelectric fan devices than traditional fans. Where the traditional fan lies directly on the surface of the heatsink allowing for nearly no air gap the fan must suck all of its air from behind which is a significantly lower amount of cubic space than the entire surface area of the pieozoelectric fan, the air around it, and the air between it and the heat sink that also must be moved.
@thejoetandy2 жыл бұрын
I wonder if that means some cooler fans would benefit from being run away from the heatsink, to utilise the Venturi effect too
@legostarwarsrulez2 жыл бұрын
@@thejoetandy that is actually why many air coolers keep a centimeter or so of space between the fan and the main portion of the finstack. An example off the top of my head is the scythe fuma 2. I’d bet one of the reasons it’s so good despite low RPM fans is because of that little bit of extra space.
@nwheatcraft2 жыл бұрын
@@thejoetandy server cases made to adhere to hot isle cold isle strictly for data center rows often use this internal to their case being cooled by fans far away from heatsinked components in the case. I think this makes sense for open air applications but once you have 1 inch to move either way things get spicy.
@samlevi47442 жыл бұрын
Bernoulli agrees.
@PedroPauloAmorim2 жыл бұрын
Please rewrite it 😢
@mattbradshaw64562 жыл бұрын
Would like to just clarify an offhand comment from Linus, wall power can very by about 5-10% in terms of voltage, but it is extremely regulated in terms of frequency. In the US and Canada you power will be with 0.1 Hz of 60 Hz.
@marcmathes412 жыл бұрын
depends on what is going on in your home. a half-broken fridge or other fans can make voltage dips in your home. add that with wire from a trailer like mine old and too small gauge and you got that honey pot for dips over 5-10% they guarantee that to your door, not in your home. you can have a flux of 5-10% on your mains and in a bad-wired home have a %15 flux in the walls. the read-out will be different electronics noise and what is on said circuit plays into that.
@mattbradshaw64562 жыл бұрын
@@marcmathes41 all of that will affect voltage and harmonic content, but it won't effect the frequency
@stefan5142 жыл бұрын
@@marcmathes41 he clearly states that Linus mixed up frequency and voltage and you decide to reply with a comment mixing up frequency and voltage 😅
@Scenty20242 жыл бұрын
@@astroid99 Lol Maybe you should stick with plumbing 😅
@LizardKing10862 жыл бұрын
@@astroid99 Most fluids share common behaviors with electricity.
@thomass.2570 Жыл бұрын
Sometimes I begin to think whether Linus is more into tech or more into the HVAC/moving heat
@Timeward76 Жыл бұрын
Those two groups are the same group.
@BeeTriggerBee Жыл бұрын
@@Timeward76 I work in HVAC and ive been eyeballing their ventilation in every video trying to make sense of it from a European perspective. so i guess its true?
@Tenchigumi Жыл бұрын
He's more into house painting.
@caspervincentius8392 Жыл бұрын
He's into being hurt by employees, look how enjoyed he was when his employees hurt him. What a kinky dude. 😂
@xzeuii Жыл бұрын
It’s all engineering one way or another
@jacobcooney17152 жыл бұрын
I think these kinds of videos are a big step in the right direction. I didn't care much for all the lab stuff when it was announced, but if this is the kind of content you're going for, I'm a big fan.
@dillyflaps Жыл бұрын
same, but I'm a thermal expansion device, not a fan.
@luierdaneenpamper3877 Жыл бұрын
pun intended? i NEED to know
@weltenkrank78072 жыл бұрын
Well in the end you can lengthen the blade to get to the resonance frequency you would loose some hz in movement or transform to whatever you need. Would love to see how this thing works in an optimised environment with optimised suction and pressure side. Also would be cool to see how far you can push this principle in terms of more complex geometry etc.
@lasskinn4742 жыл бұрын
You'd need a vfd to drive it at different hz. Anyway the main advantages supposed to be that it doesn't get dirty and lasts a long time, no bearings etc. Manufacturers vid got youtube recommended boost a while ago..
@alexrogers7772 жыл бұрын
@卐-Lakehuntist-卐 average nazi moment
@tiavor2 жыл бұрын
longer blade requires stiffer material to keep the same frequency. but I'd guess a small frequency generator would help a lot with this fan.
@ThomasNing2 жыл бұрын
diy 3d printed fan design series...? ah right, it's called fan showdown, imagine if he could find a way to make 3d printed blades for this
@therackstar2 жыл бұрын
This is a massive grift of a cheap product covered by action lab. kzfaq.info/get/bejne/iNRmpLmnnq7eeJc.html
@milkyy41682 жыл бұрын
that fan must be really cool if it's $1100
@diegocow80532 жыл бұрын
they got rgb
@hungrybeing44222 жыл бұрын
better blow good
@kiyoponnn2 жыл бұрын
...
@joshbauer22232 жыл бұрын
Dad, go home.
@eziz74682 жыл бұрын
Get it cuz like cool
@LoveWins Жыл бұрын
Now I would like to see all the blades on a heatsink doing this vibration. Imagine a CPU cooler with flat metal pieces coming off of it and vibrating to draw the air from the CPU.
@CircuitrinosOfficial Жыл бұрын
I suspect the thermal expansion of the metal would change the natural frequency.
@CD-vb9fi Жыл бұрын
You should check this video out. It is CES with a solid state thermal sink. IT might be very similar to what you are saying.. kzfaq.info/get/bejne/j62oh9F4qqfcY3k.html
@CircuitrinosOfficial Жыл бұрын
@@CD-vb9fi it's a solid state fan.
@CD-vb9fi Жыл бұрын
@@CircuitrinosOfficial I am not sure I would agree with that terminology though. There is no actual fan. But it does create a thermal sink. A fan is either a spinning circular device pushing air through a mechanical action or a flat object being waved to push air like a plow does snow. These little solid state devices use completely different mechanical mechanisms to push air. But I can understand why people would use fan because it is the easiest way to convey the idea, but it's just not a fan though. Even Jet Engines are call "TurboFans" and they still actually have Fans in them. But Rockets do not have fans in them... and they are not called fan either. I would say rockets are a closer property to this device than a fan.
@CircuitrinosOfficial Жыл бұрын
@@CD-vb9fi The product is called AirJet because it creates a stream of air. It's taking the roll of the fan. It isn't a heat sink because it doesn't have a lot of thermal mass that's absorbing the heat.
@PrimyFritzellz2 жыл бұрын
Oh I can tell for sure that the editors are having so much fun with these new videos. It's such a nice sight to see that LTT is more meme-y these times and is just having fun
@rolux4853 Жыл бұрын
While I still like it, it became very unnatural if you compare it to a few years ago.. The editing and the way things are explained is definitely for the attention span of generation TikTok. Back in the day there was some technical information about specific hardware functions, which is totally gone. Only „memes“ (I despite that ridiculous term) for teenagers that aren’t able to listen for more than 5 minutes and if something is complex they completely shut down and call it boring. It’s unbelievable, when I was 15 we where on one level with the 25 to 30 year old people, nowadays it’s like the people under 20 act like being dumb and hollow is something to admire. The government should care about motivating kids to be the future of our free western world instead of allowing them to use a propaganda tool from a foreign government we should consider an enemy more threatening than Russia in the Cold War!
@frymaster9850 Жыл бұрын
@@rolux4853 The word meme, coined in 1976 by the evolutionary biologist Richard Dawkins, goes way beyond social-media pixels. Meme captures the concept of “cultural transmission” of ideas in general, where customs and ideas spread from brain to brain. Which means memes have been around longer than Success Kid or Kermit sipping tea.
@kcutt082 жыл бұрын
~7:00 This is definitely related to Bernoulli's Principle. The moving air particles right after the tip collide with others and can create greater airflow further away, then it dissipates back down as it gets more and more spread out.
@crzyvaps2 жыл бұрын
That’s not Bernoulli’s principle at all
@ChadDidNothingWrong2 жыл бұрын
@@crzyvaps he said related to it
@danmacdonald31372 жыл бұрын
I love this kind of video. Reminds me of the random one-off nonsense we'd have to work with in my instrumentation lab for nuclear inspection equipment. Such as paint on piezoelectric we played with for ultrasound. Nostalgic and interesting!
@dantecavallin8229 Жыл бұрын
If you consider it, air is a very bad element for cooling because of its low energy capacity so moving air fast across the system does very little in terms of cooling compared energy required to move the air. I think a low powered fan like this should be enough in relativly cool conditions like this steam deck. However if the heatsink was hotter it would require something stronger to move the air.
@kevincarlos9732 жыл бұрын
3:27 that scared the shit out of me!
@JonManProductions2 жыл бұрын
Can I say it again that the editors at LMG were trained well by Taran, and now they have been just ridiculous in the last couple of videos! :D
@twizz4202 жыл бұрын
No, Taran was the best and there will never be another Taran.
@ovidiu93292 жыл бұрын
The video editing is top notch in the past episodes, I wanted to comment this too.
@darkionx2 жыл бұрын
@@twizz420 Taran was the best and he probably was so fast that he could edit all videos of all channels if there was Noone else avaliable. But even he could take a couple of hours to edit well a video.
@justinmcgough39582 жыл бұрын
@@twizz420 What happened to him? Did he just leave LTT?
@Marcelis2 жыл бұрын
@@justinmcgough3958 yeah
@SlovakLegend2 жыл бұрын
6:30 wait what.... 250$ for a backpack, are you kidding me? :D Is it made of gold?
@electronron12 жыл бұрын
I the late 70's or early 80's there was a piezoelectric fan that used 2 blades in a V shape. I think it was intended to fit in a Tandy Color Computer and ran about $15.00 or $20.00. I don't remember what it was called but I want to say it might have been called the butterfly fan.
@liamstone3437 Жыл бұрын
Back in the day I bought a memory upgrade for my Mac 512 giving it a full 1024K of memory. A fan like this was included in the kit. It was no way near $1100 even if you adjust for inflation. You got ripped off! I still have that old Mac so I guess it is worth more than I thought.
@ZecrOfficial2 жыл бұрын
6:13 with such little power draw it would be interesting to see how many of these you can fit into a computer or some sort of custom case to cool a pc and see about trying to get the same voltage amount used from these as your normal fans would use which in turn would mean using a lot of these fiberglass fans but, the outcome for cooling could be interesting.
@tonylarose48422 жыл бұрын
Sounds like a lot of wall plugs to run all of them :/
@D1EHARDTOO2 жыл бұрын
Sounds like a super high cost, being they said they only make a few of them per year, and the one fan was more expensive than all the fans they showed put together. It would be cool but most likely highly impractical as static pressure can affect cooling in a case, and these piezoelectric fans create next to none
@roflBeck2 жыл бұрын
Probably need pretty wide heatsinks for that too lol. Could be interesting though.
@handlemonium2 жыл бұрын
Yeeeahhh lezgooooo!!! 👍
@GIGAGRILLE2 жыл бұрын
@@tonylarose4842 I'm sure the manufacturer would be happy to help building a power brick for multiple 'fans'.
@cuddlyfoxgirl2 жыл бұрын
6:06 Linus no longer just drops electronics, he now also drops people into a hypnotic trance :P
@vmarcelo492 жыл бұрын
Linus Hypno Tips
@cuddlyfoxgirl2 жыл бұрын
@@vmarcelo49 Linus Drop Tips works pretty well already tbh
@whatthe90782 жыл бұрын
I feel like another advantage is them being completely silent, other than the movement of air which is minimal compared to any fan motor. I wish these could be somehow optimized with a suction/ airflow side for actual use on a heatsink
@mazupicuaplaysgames Жыл бұрын
I understand it's a premium backpack.... But bruh $250?
@Rawmon942 жыл бұрын
top tier editing @ 1:32
@MrStumpson2 жыл бұрын
7:33 The lab team is so good they know when Linus whispers about them. I'm impressed
@z3rotollranc32 жыл бұрын
These are the kinds of videos I wish you guys made more of. Weird tech and practical/impractical uses for it.
@mflewell Жыл бұрын
Very cool. It sparked a random childhood memory, when I was a kid my dad and I took apart an old Macintosh computer. I remember it having a weird buzzy flappy fan. Now I know more about what to actually was
@applefanXXX Жыл бұрын
Are you sure it was actually one of these? Surely not
@tripleheadedmonkey6613 Жыл бұрын
@@applefanXXX Surely it couldn't have been an over 50 year old technology that costs barely anything to produce on a mass scale?
@Neoxon6192 жыл бұрын
At the rate GPUs are increasing in power consumption & heat, we may need an entire PC build with expensive fans.
@sphrcl.2 жыл бұрын
@DONT READ MY PROFILE PICTURE shut up
@kooljc72 жыл бұрын
Yes
@dexterjsullen2 жыл бұрын
🙄They already done that, didn't get too much views.
@nathankennedy32902 жыл бұрын
And an exhaust system to the outside of the house like dryers have lol
@acardenasjr13402 жыл бұрын
...or, build a PC in an AC...🤔🤔🤔
@APassingCloud_2 жыл бұрын
I wonder if you could conduct heat to the "flat tape part" of the fan itself. Then it would be like waving a hot thing around to cool it off.
@StemLG2 жыл бұрын
good idea
@LKLM1382 жыл бұрын
And pretend it's a finger that was just burnt " ow Ow ow "
@magica35262 жыл бұрын
that could hypothetically be wildly efficient, maybe with graphene blades? Might not scale well though...
@orderlyhippo15692 жыл бұрын
@@magica3526 The space needed to heat dissipation ratio needs to be compared. Actually some laptop fans have a ton of suuuper thin fan blades. You could have a metal fan and run heat to that! But I don’t know how you could connect a spinning metal object to a heatsink. Maybe with water. In fact, applying a metal sheet to the side of the fan pushing the air, you could theoretically make the air warm on one side of a fan blade and cold on the other and boost the blade’s pushing effect on the air. The faster the blade spins, the more heat is dissipated just like a normal fan strapped to a heat sink. But the fan would probably have to run more frequently since it wouldn’t have much metal to store heat
@eXe092 жыл бұрын
@卐-Lakehuntist-卐 Are you okay bro?
@emu0719812 жыл бұрын
I seem to recall maybe mentioning using these piezoelectric fans to provide a much more slimline cooler for the Steam Deck back when you first modified the one in this video - to be honest though, I don't remember if I actually commented it or not. Either way, it is cool to see that it does actually work. If the price could be brought down then they may be a viable replacement for the rather noisy blower fans that were used on a lot of reference coolers from AMD and Nvidia.
@itsTyrion Жыл бұрын
1:36 idk why but that perfectly cut reverb scream was HILARIOUS
@rehatbir.2 жыл бұрын
I love the washer example here. Such a simple mechanical pendulum example to explain an electrical concept. Beautiful
@lucascb84462 жыл бұрын
@@dontreadmyprofilepicture5585 That joke is older than the solar system
@NoahSONG2 жыл бұрын
yup this reminds me of the engineering school days.
@NeferetThePaladin2 жыл бұрын
@@lucascb8446 you are talking to a bot it doesn't care
@Anonymous-sb9rr2 жыл бұрын
It's a mechanical pendulum to explain a mechanical concept. Still a good explanation.
@someonespotatohmm95132 жыл бұрын
@@Anonymous-sb9rr *physics. or maybe math?
@nikohl2smodt2 жыл бұрын
3:00 the rest of the world used 220/240 v 50/60hz not just Europe
@sgt.wolfenstein08182 жыл бұрын
I love the sound engineering in this video.
@brianbrazill7919 Жыл бұрын
Have you tried 3d printing something similar to the Dyson Vaccums? You can use the "high" pressure created by the piezofan create a low pressure and increase your flow.
@Gaiot12 жыл бұрын
1:41 You're welcome.
@chaselewis53722 жыл бұрын
I used to be super interested in piezeoelectric actuators because they are able to move things at sub nanometer accuracy. I always thought those were super cool as they are used for fine motion control in chip manufacturing and advanced optics. Piezo's have a lot of advantages in super demanding applications, just they aren't super useful in the average application in a weird trade off.
@matissnormunts39662 жыл бұрын
Diesel injectors was the only place I had heard of them. Pizeo injectors make like 2000 ish plus bar of pressure incredibly quickly.
@jameshealy45942 жыл бұрын
I remember back in the 90's there was an MTB company using piezoelectric technology in their suspension, the idea (IIRC) was that the fluid in the dampers would dramatically increase in viscosity with a small electrical current applied, which they used with a battery pack to allow a suspension lockout button. In those days everyone was still questioning if suspension was worth the inevitable (though often minor) losses in power transmission from pedalling, not sure how much has changed though I suspect the other advantages won out.
@lilybogusz35762 жыл бұрын
@@jameshealy4594 re: your question about nowadays. Bikes are a lot more optimized now, there's like 5 rough categories of mountain bikes that range from DH sleds that you can barely pedal a walking trail with, to hyper efficient xc bikes. So there's options for that trade off. As well, nearly every shock and fork have lockouts, and xc bikes even often have a cable pull on the bars to turn it on or off for even tiny climbs and descents. Also, we know a lot more about geometry now. especially in the middle of that spectrum, bikes are tuned to have more antisquat and other fancy stuff that makes travel not linear in ways especially good for conserving energy from the small, gentle bobs from pedaling.
@jameshealy45942 жыл бұрын
@@lilybogusz3576 thanks for such a detailed reply! Interesting that the lockout idea stayed around, not requiring batteries is probably an advantage too.
@arthurmoore94882 жыл бұрын
The surprising thing is they do have plenty of real world applications. Every crystal oscillator is using the piezoelectric effect. Misters, atomizers, and humidifiers also often use it. Not to mention most cheap buzzers and alarms. That's without going into things like igniters. Some of those require extreme accuracy, and others don't.
@mrpekko982 жыл бұрын
Whoever did the linus perfectly cut scream edit at 1:33. Bruh chill, im at work. Im choking while holding an uncontrollable laughter without attracting too much attention 🤣🤣
@MaiChaMH Жыл бұрын
0:26 You’ve missed the perfect opportunity to introduce your sponsor here
@EnsignLovell2 жыл бұрын
I love how "Bill of Materials" was so clearly highlighted. We all know Linus could make a BoM quite easy if he wanted... But he would then put himself at risk from dropping the BoM and forgetting what was in it.
@brothertheo26772 жыл бұрын
I remember fans like that back in the 80's. They were meant for local cooling of hot parts.
@sebastiangiovannella77782 жыл бұрын
Considering how old they are and in pc cases we still use regular fans I feel like they won’t replace the traditional fans
@dustinbrueggemann18752 жыл бұрын
@@sebastiangiovannella7778 Luckily they're not really meant to. Unless you're scavenging milliwatts or working around explosive vapors, these aren't the part for you.
@jwadaow2 жыл бұрын
@@dustinbrueggemann1875 They last a long time.
@MiGujack32 жыл бұрын
@@jwadaow Then again, you could overbuild a traditional fan to last 100+ years easily.
@guily66692 жыл бұрын
@@jwadaow If you oil the fans they will last more than the parts they are cooling too at least in PC's... I'm still using some fans from 2011, but I didn't wait for them to blow, I just oiled them like 2 or 3 times after a full PC cleanup, however sadly I broke my favorite Aerocool red Shark fan when trying to open it up to fully clean the build up dust and was fully working fine sadly... To me they are running the same as new, specially the Xigmatek 120mm AEGIR fan which came with my 2011 big air cooler which still beat the crap up a lot of recent fans in cooling at cost of noise since it can go upto 2200rpm, but when it started making the slightest bearing noise I oiled it and it still going like new with many more hours than its MTBF. But sure I had some dodgy fans too which started making bearings noise in no time and I just threw them away as it's pointless to fix crappy fans. ps: buy good fans and oil them from years to years after a full cleanup and you probably will never have to replace a single fan for the whole time of that PC (also some fans like my Xigmatek one are super easy to oil as they have a rubber seal behind the sticker, you just need to remove it, oil it and put it back, no tools needed. I really hate is when they cheap this out and the only seal for the oil is the rear sticker it self, I have a few like this which is stupid)...
@davidroberts32622 жыл бұрын
3:17 won't work in Europe? 🤦♂️ I can't believe Linus said that. You know you just need a power suppler converter :p
@hyperbomb022 жыл бұрын
IIRC some more recent research has found that heatsinks benefit from turbulent air more so than a smooth constant airflow that you normally get from fans. The piezoelectric fan may incidentally be creating a turbulent air flow and the heat sink is benefitting from that. I believe you'd have to do a lot more testing than just a quick game session between the 2 fans, as the gap between them seemed a bit much to be explained completely by the turbulent air affect.
@jameshealy45942 жыл бұрын
I remember back in the 90's there was an MTB company using piezoelectrics in their suspension, the idea (IIRC) was that the fluid in the dampers would dramatically increase in viscosity with a small electrical current applied, which they used with a battery pack to allow a suspension lockout button. In those days everyone was still questioning if suspension was worth the inevitable (though often minor) losses in power transmission from pedaling, not sure how much has changed though I suspect the other advantages won out.
@alejandroguzmanmartin-onda63492 жыл бұрын
A guy at my college is/was doing his master thesis on that. Magnetorheologic dampers. I think it was something about the control side.
@geoffreygoffman3222 Жыл бұрын
GM actually uses MR dampers on their current vehicles, and I think a few other auto manufacturers that offer "active dampers." they're based on magnetic oils/particles suspended in a carrier fluid so that when they're exposed to an electromagnetic field they align themselves together, increasing the viscosity. Very very cool and makes me think it could be applied to way more than suspension (maybe body armor?).
@bargiona2 жыл бұрын
I feel this video has left me with more questions than answers. The conclusion seems to be that this straight up demolished a Noctua fan, but tests seemed not very controlled.
@eddievhfan19842 жыл бұрын
Yeah, they didn't really do a summation (I've also noticed they got rid of the LTT intro on quite a few of their recent videos), but my takeaway from this is that despite being limited by economies of scale (low numbers, high cost per item, high MSRP), piezoelectric fans could potentially be more effective than traditional rotary fans in terms of air flow rates, noise, and power consumption. Somebody just has to be willing to commercialize it in high enough numbers to make it affordable.
@freevbucks80192 жыл бұрын
@@eddievhfan1984 Plus, the piezoelectric fan doesn't have any static pressure, making it very suitable as a case fan
@davidy222 жыл бұрын
It has some practical issues because if you mount it on the CPU, it doesn't do anything to cool the CPU because it blows in the wrong direction so you have do a different awkward mounting thing with putting the fan on the wall of the case if you were trying to replace a CPU fan. You can mount a round fan directly on anything you're trying to cool as opposed to this thing where you need to set these up pointing at your parts
@deepspacecow26442 жыл бұрын
@@freevbucks8019 sarcasm?
@stdorn2 жыл бұрын
6:00 a better example would be pushing someone on a swing. You put a tiny amount of energy in at the right time and get a large amount of motion.
@divyam._.maheshwari2 жыл бұрын
Put 10 of these in an actual PC and show us. That'd be cool.
@MediocrityInMotion2 жыл бұрын
Definitely super interesting tech. GE made a version that was a disc and could fit in small places but after an initial press push disappeared. If you are interested look up Dual Piezoelectric Cooling Jets.
@tHaH4x0r2 жыл бұрын
Although most of what you are mentioning is correct, there's a glaring mistake at 6:00... Just measuring input power says nothing about power efficiency... Although I wouldn't be surprised if it is indeed very efficient, you cannot claim so from the measurements you do. You are not measuring the effective output power (which could be a PQ curve, although that would be terribly hard to attain for non-axial/radial fans) so you have nothing to relate that too. Never mind that 'power efficiency' is highly dependent on load. For example an axial fan will do great in a high flow environment, but if you restrict the flow efficiency drops dramatically (this is a domain where radial fans perform much better).
@ABaumstumpf2 жыл бұрын
Yeah, but the efficiency is terrible anyways.
@NzoDK2 жыл бұрын
Try putting six together and synchronize them like an i6 or flat 6 engine to cancel out vibrations.
@doktorphlog21432 жыл бұрын
whoever did the edits for linus getting shocked deserves a raise. peak schadenfreude
@TechnologistAtWork2 жыл бұрын
The other nice thing about them, they can also be made into speakers that produce much less magnetic fields compared to conventional speakers, making them an excellent option for magnetometers that are very sensitive to magnetic noise.
@phuzz002 жыл бұрын
Back in the day, every PC case would come with a piezo-speaker, which would produce beeps for the motherboard
@TechnologistAtWork2 жыл бұрын
@@phuzz00 yup. It's odd that Linus is talking about it like it's some new technology.
@jpfidalgo72 жыл бұрын
This "sounds" like a cool video....
@14000things2 жыл бұрын
The editing on this video is great
@artbeautyandmadness30912 жыл бұрын
Note that they could have designed this fan better by not depending on the mains frequency, but by adding a feedback circuit on the piezo element in such a way that it will self-oscillate at its own natural frequency at ANY reasonable voltage.
@medicalwei2 жыл бұрын
6:25 *cries in asian*
@hobpie2 жыл бұрын
Holy cow, never expected to see piezo in LTT. I design PZT based sensors and transducers for the medical market. I'm 100% sharing this around the office tomorrow.
@falsemcnuggethope2 жыл бұрын
I recall they've played with piezos more than once before
@Skyflairl2p2 жыл бұрын
Throwing money out the window would generate more airflow, and for 1100 - you can throw quite a lot. But it is interesting to think this has an actual application around the world.
@AlmostLikeHuman2 жыл бұрын
I need a dedicated playlist for Alex and his weird sh*t. Best content on youtube.
@NuggetsXInfinite2 жыл бұрын
I'm crossfaded and I don't even know what Linus and crew is working on right now. Completely forgot what this video was about midway through
@sourabhchikode5752 жыл бұрын
You can make it at home - get a piezo electric buzzer - attach a plastic strip to it - and play different frequency buzzing sound. - Since the piezo buzzer is essentially a speaker - you can fine tune the vibrating frequency with the naturally frequency of the plastic strip. You can do this all in less than $10. Your Welcome 😊
@jimmyb14512 жыл бұрын
Yeah, it's not that simple. The drive voltages for piezo's start off at around 80v. There are very few amplifiers with 70 or 80v rails and there are very few step up or matching transformers that will operate across wide frequency bands.
@ryangoralnik4732 жыл бұрын
i love the linus screaming single frames. they need to be kept for future videos. even the soundbite is great!
@nier37982 жыл бұрын
i can't seem to remember where i first encountered his "perfectly cut screams", but I am certain it is one from only a couple months ago
@FilinMXr2 жыл бұрын
You know Aprime edited the video when you see high quality memes
@divyam._.maheshwari2 жыл бұрын
1:36 *end of LTT* 6:04 ↔️ 8:52 *Linus Drop Tips*
@paddis122 жыл бұрын
4:57 it has to be the cutest fan ever, besides me of course
@owlic2272 жыл бұрын
$250 for the backpack?! That's actually insane lol.
@mercy94872 жыл бұрын
The editors are on point, the cuts are hilarious. 😍
@nimamaster61282 жыл бұрын
+ : "Where are you dude? The match is bout to start." - : "Hold on I'm tuning my fans' resonance"
@nathantron2 жыл бұрын
I'm so glad you did this video. I've been waiting to see this tech. I want PC Fans of these. COMPLETE SILENCE!
@kaMosGO2 жыл бұрын
Well its actually pretty simple why the temperature of the Steam Deck CPU was so much lower: The Noctua was connected so it wouldn't turn on unless a certain temperature was achieved, while the Piezo blade was running the whole time
@valerafox77952 жыл бұрын
that lil dude didn't consume anything tho / .+ no sounds.)
@ABaumstumpf2 жыл бұрын
@@valerafox7795 it does make a sound, also vibrations, and moves way less air (they are royally inefficient in comparison).
@Six_Gorillion2 жыл бұрын
@@ABaumstumpf it needs to be only 21% as efficient as the noctua to kick its ass in perf to power metrics. 1w vs 0,2w. Accurate to compare would be to stack 5 of these up against the noctua.
@ABaumstumpf2 жыл бұрын
@@Six_Gorillion "it needs to be only 21% as efficient as the noctua to kick its ass in perf to power metrics." You really do not have clue what the word efficiency means, do you?
@Six_Gorillion2 жыл бұрын
@@ABaumstumpf It is you who don't. Efficiency is a matter of context. Is it power efficient? Yes. Is it cost efficient? No. Take a hike.
@hypershrimp_2 жыл бұрын
this is what happens when linus gives his credit card to an ltt employee lol
@Zwettekop2 жыл бұрын
worth it
@Y2Kvids2 жыл бұрын
Other Celebs : Fans Spending Tons . Linus : Spending tons on Fans .
@aaryananand72882 жыл бұрын
at 2:30 , this man just explained resonance without saying resonance
@BitValentine2 жыл бұрын
I absolutely love the editing on this. It's hilarious 😂 please do more like this.
@darmspalter30002 жыл бұрын
fan costs more than my entire setup
@darmspalter30002 жыл бұрын
@DONT READ MY PROFILE PICTURE omg f**** i read the username!
@GordieGii Жыл бұрын
I remember Radio Shack used to sell a piezo fan 40-45 years ago that looked like two of these in parallel. Think tuning fork. It would be much easier to tune the oscillator in the power supply to the resonant frequency of the fan (dynamically even, three wires) than to tune the fan to 60 Hz, so there's no reason it couldn't work in Europe.
@evangorski7992 Жыл бұрын
1:32 I’ve done that before, don’t buy the RAW extended electric clipper lighter, for some reason they chose to put the spark gap right where your thumb would be if you light it with your thumb slightly too far forward
@witness10132 жыл бұрын
Worth at least $9
@TKolb132 жыл бұрын
Wait, did that really just say $250 for a BACKPACK?!?! Linus. You’re insane.
@mrdan28982 жыл бұрын
lol, You also noticed as did I. I guess their LTT logo is worth $250.
@bacon.cheesecake2 жыл бұрын
Quality backpacks are really expensive, given the raving reviews it's received so far, although it's expensive, it's actually not bad value.
@TKolb132 жыл бұрын
@@bacon.cheesecake in todays market. To come out with a overpriced BACKPACK is just moronic. And it shows the channels true colors. I guarantee the profit margin on it is at least 50%. I wish ANYONE who buys one the best.
@diadetediotedio6918 Жыл бұрын
@@TKolb13 What is the problem with 50% profit margin?
@jackagonz2 жыл бұрын
My thanks to whoever edited this so well
@xaytana2 жыл бұрын
Considering what it did for the Steam Deck, I almost want to see GN test one of these. I don't think they have a low TDP heater yet, though I think they should to showcase mobile devices as a cooling setup can honestly make or break a device, and to show when a cooler is overkill for a certain build, but it'd also be interesting to see one of these tested just to see actual performance numbers within a validated testing methodology. I'd also be curious to see what happens when you change dimensions, long and thin, short and thick, and a balance between the two, just to display what flow characteristics are like at the same base frequency.
@jckf2 жыл бұрын
No, the frequency of your mains power can NOT be "all over the place". It might happen during brown-outs, but power plants MUST be in perfect synchronization to avoid effectively shorting each other out.
@dennydravis87582 жыл бұрын
Yup - I imagine that box is more to match the impedance of the crystals than to account for the frequency of the mains
@verygoodbrother2 жыл бұрын
It can happen during brown-outs so by your definitions it "can" be all over the place, just very rarely.
@al_kaloid2 жыл бұрын
Maybe Linus just ad-libbed that and confused voltage differences in different households with frequency?
@jckf2 жыл бұрын
@@verygoodbrother Changed one "can" to "might" to avoid using the same word for two different things. Thanks 👍
@DctrGizmo2 жыл бұрын
It would be cool to see how it would perform as a desktop CPU cooler.
@GabrielCSousa Жыл бұрын
1:36 love the reverb there, nice job
@onenerdarmy2 жыл бұрын
Months ago while building out a DIY car cooling system I sorted fans by price on part supplier sites and these stood at the top. Immediately fascinated with this piezo fan as I've always loved messing around with quartz and it's shocking behaviors, my wallet wasn't ready to stomach a 186x increase in project budget for this. Thought I would never get to see one in action - thank you. If I had a $20 mil budget to build an office I'd make a wall of these in the atrium with a scanned laser line focused on the plane of the blades to illuminate them making a fluidic and moving diffused light on a black background. But you would need ~ 100 of these for people to really be struck with it, so that's probably like 4 years of production from this fan maker right there ha.
@jake-san2 жыл бұрын
There's like 0 reasons why this piezo dohickey wouldn't work of from any other power source if it were run with a H-bridge and with DC voltage. If you'd run it like that (Instead of being synced artificially to AC mains peaks) you could even tune it digitally by finding the optimal timing between the square wave peaks.
@flummi69662 жыл бұрын
Finally we can cut the cable to the ISS, Xd
@proesterchen2 жыл бұрын
Kudos for bringing in a Steam Deck without turning this video into yet another Steam Deck + something release.
@DinkyPattern12 жыл бұрын
Thats why Southlanders has a Fan in their Hand and not an electric Propeller
@confused_horse2 жыл бұрын
07:35 was the best moment :D
@SMthegamer12 жыл бұрын
I was expecting the backpack to be like $75-$100 including shipping, but wow $249.99?! It'd be destroyed long before coming close to return of investment.
@sonnydthomas2 жыл бұрын
$250 is absolutely ridiculous.
@joeltaylor77412 жыл бұрын
Yup gotta jump on this comment to agree, my jaw hit the ground when they mentioned $250. What the hell! Nothing can add that much value to a backpack, no matter how nice the materials/features etc.
@williameldridge93822 жыл бұрын
@@joeltaylor7741 apparently you've never seen hiking backpacks. They don't have half the features and a lot of those will push $500.
@williameldridge93822 жыл бұрын
In the video he did about it, he's confident it will last a very long time. The backpack I have, that I paid $175 for, isn't half as nice as this thing. I don't think you understand how much a backpack costs. High quality backpacks are load-balanced so they don't tug on your shoulders, so you can carry them for hours upon hours at a time. There's a company called Equilibrium USG and they make modular systems that can end up costs north of $700 if you go all out. You're not talking about a "hur hur put things in bag". There's pockets, design concepts, material considers, and a lot more.
@jubuttib2 жыл бұрын
1:24 "stylus of a record player" Wait a minute, I thought most (at least most better) record player cartridges used either moving coil or moving magnet type construction, rather than piezo? EDIT: And even in piezo cartridges, isn't the stylus usually some much harder material (like diamond or something), which is then attached to the (usually quartz) crystal that's used to generate the signal?
@FinlayDaG33k2 жыл бұрын
10:35 What's up with the joycon looking thing he's fiddling with?
@user-re4jf2sb4q2 жыл бұрын
I about had a heart attack at @6:20. $250 for a school bag?
@thenerdyouknowabout2 жыл бұрын
"Your mains power can be all over the place" No, not in the slightest! Its very *very* tightly controlled (_very_ sub-hz). Strikes me there some research you guys could be doing, and some videos that could be made on mains distribution.
@SuperSmashDolls2 жыл бұрын
laughs in Europe's occasional mains frequency upsets
@ALZlper2 жыл бұрын
@@SuperSmashDolls What? Not at all. Where exactly? Frequency deviation cause black outs. Very quickly, withitin tiny margins. The European power grid is a pure miracle.
@stan1102 жыл бұрын
@@ALZlper Back in 2018 was a huge deveation to the point clocks that uses mains to measure time was 5-6 minutes off. but that was a one time event.
@ALZlper2 жыл бұрын
@@stan110 And you can learn about it here: kzfaq.info/get/bejne/mM-aYK2b36nFZ6M.html 49,996 Hz ..
@ILoveTinfoilHats2 жыл бұрын
"But if I time it correctly" _proceeds to time it very incorrectly_
@imkindatired93322 жыл бұрын
7:25 made me physically cringe. I have no clue how delicate that is but burning incense can’t be good for it.
@TheGagabou2 жыл бұрын
Man those edits made this so much better; nice.
@joshmnky2 жыл бұрын
I wonder if you could make the flap itself a heatsink. Maybe you can have a CPU heatsink that's a bunch of tiny vibrating whiskers. The only problem would be find a high thermal conductivity material with infinite fatigue life.
@benjaminmiller36202 жыл бұрын
*CNTs:* Hello, you rang?
@someonespotatohmm95132 жыл бұрын
sooo, copper?
@joshmnky2 жыл бұрын
@@someonespotatohmm9513 copper's fatigue life is like 100M cycles. At 60Hz, that's a service life of 20 days. The flap of one of these whiskers probably isn't a full stress cycle though. If it's only 1/100th of a full cycle, we might be in business. My wild guess is copper would last a couple years.
@NicosLeben2 жыл бұрын
Do you also have to tune the blade for low and high air pressure like at sea level and in the mountains?
@antilogic812 жыл бұрын
Okay I normally don't talk about the background music but I love that synthwave you got going on here.
@TheSliderW2 жыл бұрын
2:10 Open the transformer and mesure the output with a voltmeter in AC and an osciloscope I'm bettting it's only droppimg the mains to about a volt if not less but you will see a spike on the scope for the initial start.