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.

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.

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

Probably that's it, fan makes a ~120hz sound

@@NanoMine Almost certainly

That's some seriously clever stuff

@@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).

Got any links to those research papers. I think concepts very interesting and would love to check it out

we use Piezoelectric transducers to make fog machines its neat. and cheap to make..

@@freazyknight Thank you! You got me interested now

If anyone would have a spare of these, it's you, especially one as unique!

Ovens often use it for their clocks

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.

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.

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

@@Bobby11 wall clocks? On mains power?

I wonder if that means some cooler fans would benefit from being run away from the heatsink, to utilise the Venturi effect too

@@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.

@@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.

Bernoulli agrees.

Please rewrite it 😢

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.

@@marcmathes41 all of that will affect voltage and harmonic content, but it won't effect the frequency

@@marcmathes41 he clearly states that Linus mixed up frequency and voltage and you decide to reply with a comment mixing up frequency and voltage 😅

@@astroid99 Lol Maybe you should stick with plumbing 😅

@@astroid99 Most fluids share common behaviors with electricity.

Those two groups are the same group.

@@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?

He's more into house painting.

He's into being hurt by employees, look how enjoyed he was when his employees hurt him. What a kinky dude. 😂

It’s all engineering one way or another

same, but I'm a thermal expansion device, not a fan.

pun intended? i NEED to know

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..

@卐-Lakehuntist-卐 average nazi moment

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.

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

This is a massive grift of a cheap product covered by action lab. kzfaq.info/get/bejne/iNRmpLmnnq7eeJc.html

they got rgb

better blow good

...

Dad, go home.

Get it cuz like cool

I suspect the thermal expansion of the metal would change the natural frequency.

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

@@CD-vb9fi it's a solid state fan.

@@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.

@@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.

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!

@@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.

That’s not Bernoulli’s principle at all

@@crzyvaps he said related to it

No, Taran was the best and there will never be another Taran.

The video editing is top notch in the past episodes, I wanted to comment this too.

@@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.

@@twizz420 What happened to him? Did he just leave LTT?

@@justinmcgough3958 yeah

Sounds like a lot of wall plugs to run all of them :/

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

Probably need pretty wide heatsinks for that too lol. Could be interesting though.

Yeeeahhh lezgooooo!!! 👍

@@tonylarose4842 I'm sure the manufacturer would be happy to help building a power brick for multiple 'fans'.

Linus Hypno Tips

@@vmarcelo49 Linus Drop Tips works pretty well already tbh

Are you sure it was actually one of these? Surely not

@@applefanXXX Surely it couldn't have been an over 50 year old technology that costs barely anything to produce on a mass scale?

@DONT READ MY PROFILE PICTURE shut up

Yes

🙄They already done that, didn't get too much views.

And an exhaust system to the outside of the house like dryers have lol

...or, build a PC in an AC...🤔🤔🤔

good idea

And pretend it's a finger that was just burnt " ow Ow ow "

that could hypothetically be wildly efficient, maybe with graphene blades? Might not scale well though...

@@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

@卐-Lakehuntist-卐 Are you okay bro?

@@dontreadmyprofilepicture5585 That joke is older than the solar system

yup this reminds me of the engineering school days.

@@lucascb8446 you are talking to a bot it doesn't care

It's a mechanical pendulum to explain a mechanical concept. Still a good explanation.

@@Anonymous-sb9rr *physics. or maybe math?

Diesel injectors was the only place I had heard of them. Pizeo injectors make like 2000 ish plus bar of pressure incredibly quickly.

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.

@@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.

@@lilybogusz3576 thanks for such a detailed reply! Interesting that the lockout idea stayed around, not requiring batteries is probably an advantage too.

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.

Considering how old they are and in pc cases we still use regular fans I feel like they won’t replace the traditional fans

@@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.

@@dustinbrueggemann1875 They last a long time.

@@jwadaow Then again, you could overbuild a traditional fan to last 100+ years easily.

@@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)...

A guy at my college is/was doing his master thesis on that. Magnetorheologic dampers. I think it was something about the control side.

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?).

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.

@@eddievhfan1984 Plus, the piezoelectric fan doesn't have any static pressure, making it very suitable as a case fan

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

@@freevbucks8019 sarcasm?

Yeah, but the efficiency is terrible anyways.

Back in the day, every PC case would come with a piezo-speaker, which would produce beeps for the motherboard

@@phuzz00 yup. It's odd that Linus is talking about it like it's some new technology.

This "sounds" like a cool video....

I recall they've played with piezos more than once before

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.

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

You know Aprime edited the video when you see high quality memes

that lil dude didn't consume anything tho / .+ no sounds.)

@@valerafox7795 it does make a sound, also vibrations, and moves way less air (they are royally inefficient in comparison).

@@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.

@@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?

@@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.

worth it

@DONT READ MY PROFILE PICTURE omg f**** i read the username!

lol, You also noticed as did I. I guess their LTT logo is worth $250.

Quality backpacks are really expensive, given the raving reviews it's received so far, although it's expensive, it's actually not bad value.

@@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.

@@TKolb13 What is the problem with 50% profit margin?

Yup - I imagine that box is more to match the impedance of the crystals than to account for the frequency of the mains

It can happen during brown-outs so by your definitions it "can" be all over the place, just very rarely.

Maybe Linus just ad-libbed that and confused voltage differences in different households with frequency?

@@verygoodbrother Changed one "can" to "might" to avoid using the same word for two different things. Thanks 👍

Finally we can cut the cable to the ISS, Xd

$250 is absolutely ridiculous.

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.

@@joeltaylor7741 apparently you've never seen hiking backpacks. They don't have half the features and a lot of those will push $500.

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.

laughs in Europe's occasional mains frequency upsets

@@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.

@@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.

@@stan110 And you can learn about it here: kzfaq.info/get/bejne/mM-aYK2b36nFZ6M.html 49,996 Hz ..

*CNTs:* Hello, you rang?

sooo, copper?

@@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.