WEBVTT 00:00:00.000 --> 00:00:05.339 Linus this is the most expensive fan in 00:00:03.600 --> 00:00:09.620 our office more expensive than all of these combined and this one's 250 00:00:07.259 --> 00:00:17.900 dollars right now it moves like no air is this 00:00:14.700 --> 00:00:17.900 honestly I was 00:00:18.480 --> 00:00:28.500 this is without a doubt the strangest most expensive most Niche fan that we 00:00:25.140 --> 00:00:30.960 have ever seen and I cannot wait to tell 00:00:28.500 --> 00:00:35.640 you guys how it works after I tell you how to make money on YouTube PDQ take 00:00:33.660 --> 00:00:39.780 Patch management off your plate by automating the snot out of it PDQ can 00:00:37.860 --> 00:00:43.320 keep your machines patched and up to date automatically giving you time to do 00:00:41.820 --> 00:00:48.960 more important things like watching Linus Tech tips start your free trial at 00:00:45.540 --> 00:00:51.680 pdq.com Linus hey Linus are you okay to 00:00:48.960 --> 00:00:51.680 be shocked for science 00:00:58.160 --> 00:01:04.939 I mean what choice do I have at this point I mean a lot of people fantasized 00:01:02.340 --> 00:01:09.780 with physically harming their bosses to understand the principles behind this 00:01:07.799 --> 00:01:13.979 strange little fan first we need to have a little chat about piezoelectrics a 00:01:12.420 --> 00:01:18.320 piezoelectric refers to something that is able to turn mechanical energy into 00:01:16.140 --> 00:01:22.680 electrical energy or vice versa piezoelectrics are all around us from 00:01:21.060 --> 00:01:26.820 the quartz crystal that keeps time in your watch to the stylus of a record 00:01:24.479 --> 00:01:31.200 player or even the switch of this lighter the way this guy works is 00:01:28.680 --> 00:01:35.159 there's a spring that compresses when I push down the switch then when it hits a 00:01:33.540 --> 00:01:40.860 certain point all that spring energy gets released ah a small Hammer hits 00:01:38.640 --> 00:01:46.140 this piezoelectric Crystal resulting in and this can work the opposite way and 00:01:43.619 --> 00:01:51.299 turn electrical energy into mechanical movement so inside this fan there are 00:01:48.840 --> 00:01:56.340 two piezoelectric ceramics that are sandwiched together one that contracts 00:01:53.820 --> 00:02:00.420 with positive voltage and the other that contracts with negative voltage that 00:01:58.320 --> 00:02:05.280 means when you plug it into the wall the AC power will make it start to vibrate 00:02:03.299 --> 00:02:08.340 let's do that how does this have no specs on it is 00:02:07.140 --> 00:02:13.800 that even legal it's fine well what voltage does it run 00:02:10.200 --> 00:02:16.140 at 120. this is one these vibrations are 00:02:13.800 --> 00:02:20.160 very small which is why the very fact that I'm holding it dampens them out so 00:02:18.420 --> 00:02:24.060 much that you can barely even see that it's moving but if you place it in 00:02:21.900 --> 00:02:28.739 something more rigid or even hold it a little tighter 00:02:25.080 --> 00:02:31.020 oh that's because the blade had to be 00:02:28.739 --> 00:02:36.120 very carefully tuned so that the natural frequency matched the input frequency 00:02:33.840 --> 00:02:41.340 and it has to be matched within a couple of Hertz Ah that's why we need this 00:02:39.480 --> 00:02:45.780 power supply instead of just running straight off the mains your Mains power 00:02:43.739 --> 00:02:49.440 can be kind of all over the place to illustrate the importance of this think 00:02:47.580 --> 00:02:55.200 of the blade here kind of like this washer on a string if I just randomly 00:02:52.560 --> 00:03:00.120 move my hand around the washer barely moves we're not blowing any air with 00:02:56.879 --> 00:03:02.280 this but if I time it correctly I can 00:03:00.120 --> 00:03:06.959 get the washer going pretty good that's because I'm matching my input to the 00:03:04.739 --> 00:03:13.080 natural frequency of this system same principle here so the size and weight of 00:03:09.959 --> 00:03:15.360 this blade has to be carefully tuned or 00:03:13.080 --> 00:03:19.860 it will barely move which actually means that this one here won't work in Europe 00:03:17.940 --> 00:03:24.780 because here in North America our wall power is at 60 hertz and in Europe it's 00:03:22.260 --> 00:03:29.580 50. they actually tried tuning the blade to somewhere in between but it has to be 00:03:27.000 --> 00:03:33.420 within about one or two Hertz for it to work it's hula hoop an elementary gym 00:03:31.260 --> 00:03:39.900 class all over again really I have no rhythm sorry but your your waist 00:03:36.720 --> 00:03:41.760 what are you saying what all right where 00:03:39.900 --> 00:03:44.519 do you want this masking tape just right on the end somewhere it doesn't really 00:03:42.959 --> 00:03:48.000 matter it's like a big old whack of it or like I don't know I haven't tried 00:03:46.200 --> 00:03:53.940 this yet oh I see maybe it'll work way better okay I think that what I'm trying 00:03:50.640 --> 00:03:55.739 to do is increase the surface area all 00:03:53.940 --> 00:04:00.420 that you're trying to do is just knock it out of natural frequency oh I see 00:03:58.500 --> 00:04:05.220 well all right there will that be enough oh it still seems to work pretty good 00:04:02.819 --> 00:04:09.080 that's way less than before though I want to touch it can I touch it you can 00:04:06.720 --> 00:04:09.080 touch it 00:04:14.180 --> 00:04:21.120 all right we have a job to do 0.55 00:04:19.380 --> 00:04:25.440 let's go back just that tiny little bit of masking 00:04:22.680 --> 00:04:28.919 tape and then try it again whoa whoa Nelly now it's almost an inch 00:04:27.240 --> 00:04:34.259 that's double with just that tiny piece of tape so we're basically paying for 00:04:31.080 --> 00:04:35.940 some master Piezo Craftsman no we're 00:04:34.259 --> 00:04:40.020 paying for it they only make a couple of them a year that was later in the script 00:04:37.740 --> 00:04:44.220 but like you know now before we go any further this is more than just a party 00:04:41.940 --> 00:04:48.180 trick and blowing air by waving a piece of fiberglass around has a couple of big 00:04:45.840 --> 00:04:52.800 advantages first of all there are no wear surfaces I mean sure this fan has 00:04:51.120 --> 00:04:57.180 high quality bearings that'll let it spin for a while but eventually it's 00:04:55.199 --> 00:05:03.240 going to seize up noctow rates their fans at about 150 000 hours of operation 00:04:59.880 --> 00:05:05.759 or about 17 years that's not bad but the 00:05:03.240 --> 00:05:12.300 folks over at piezo.com had one of these babies nailed to the wall in 1982 that 00:05:09.120 --> 00:05:14.580 ran non-stop until 2008 with the only 00:05:12.300 --> 00:05:19.020 required maintenance being occasional dusting oh yeah and actually it was 00:05:16.800 --> 00:05:22.560 still fine after those 26 years they just moved offices and figured the poor 00:05:21.000 --> 00:05:26.699 thing had had enough another key Advantage is dust management if you were 00:05:24.900 --> 00:05:31.440 in a clean room for instance and you had a fan like this running it would shed 00:05:28.580 --> 00:05:36.000 tiny Trace Amounts of oil and dust into the surrounding environment this on the 00:05:33.120 --> 00:05:40.860 other hand sheds absolutely nothing an even bigger benefit though is power 00:05:37.919 --> 00:05:45.539 consumption this tiny 40 millimeter fan is rated for 0.5 Watts which when you 00:05:43.680 --> 00:05:50.940 factor in the inefficiency of converting AC to DC power lands us at about one 00:05:48.840 --> 00:05:55.320 Watt that's about as low as you can get with a traditional fan our piezoelectric 00:05:53.160 --> 00:05:59.759 fan on the other hand gets most of its motion from hitting that natural 00:05:56.940 --> 00:06:04.440 frequency making it incredibly power efficient I mean think back to our 00:06:01.800 --> 00:06:08.639 washer again what's more efficient going like this 00:06:06.000 --> 00:06:13.080 or going like this this one is rated for 100 to 200 milliwatts but unfortunately 00:06:11.220 --> 00:06:16.979 we clearly don't have the resolution to measure that so we're going to move on 00:06:14.520 --> 00:06:20.940 to our next station which is testing its performance compared to this boy can you 00:06:19.440 --> 00:06:26.340 see this okay or do we need a black background here see it but black background might be better you know what 00:06:23.940 --> 00:06:30.060 I have an idea how about this LTT Store backpack we're going to have four waves 00:06:28.080 --> 00:06:34.620 of availability in the coming weeks so make sure you get your order in so that 00:06:31.560 --> 00:06:38.280 you are in the queue 00:06:34.620 --> 00:06:39.360 oh wow it really goes doesn't it I 00:06:38.280 --> 00:06:45.479 didn't think I was going to get that much airflow out of it you can really see a night and day difference between 00:06:42.479 --> 00:06:47.759 it being slightly behind the fiberglass 00:06:45.479 --> 00:06:53.039 Reed and then right next to it so that's clearly where the intake is like right 00:06:49.860 --> 00:06:55.500 along the sides here that's so bizarre 00:06:53.039 --> 00:07:00.060 the air current is so much greater than what it feels feels like 00:06:58.080 --> 00:07:05.039 be freaking blowing this into I can't even feel it in my notes it says it has 00:07:02.280 --> 00:07:08.520 essentially zero static pressure and needs free air around it to bring in 00:07:06.660 --> 00:07:12.419 it's not actually like a normal fan but this still even though I'm reading that 00:07:10.319 --> 00:07:18.419 off a teleprompter I don't get it how can something blow this much air and yet 00:07:15.780 --> 00:07:23.160 I cannot feel it at all like there's no pressure like I can but barely okay well 00:07:20.880 --> 00:07:27.539 let's just compare it to this sure a 40 millimeter it's gonna get absolutely 00:07:25.139 --> 00:07:32.160 annihilated Noctua would never let us down yeah my cost performance analysis 00:07:30.180 --> 00:07:36.259 is that this is probably better for most things 00:07:33.539 --> 00:07:40.740 don't need the lab to tell me that no no you're good you're good 00:07:38.880 --> 00:07:44.360 yeah I could get into incense if it's always like playing around with cooling 00:07:42.240 --> 00:07:50.400 fans you're with it uh technically the steam 00:07:47.580 --> 00:07:55.319 deck is a computer and it is one that we already managed excellent results with 00:07:52.680 --> 00:08:02.759 using a 40 millimeter cooling fan so will rpa's electric fan be a suitable 00:07:58.680 --> 00:08:03.419 replacement I suspect no but 00:08:02.759 --> 00:08:11.580 um we're gonna give it a shot anyway Alex how the hecking okay this is pretty cool 00:08:09.539 --> 00:08:15.060 I might want to turn it off first no no it seems fine I'm turning it off yeah 00:08:13.500 --> 00:08:19.800 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 00:08:18.180 --> 00:08:24.539 could have just slotted it right in oh valve steam deck now with three thousand 00:08:22.680 --> 00:08:30.000 percent more vibration how much does that fan make the bomb go up Ah that's 00:08:27.660 --> 00:08:35.940 pretty good though I mean it's uh fairly lightweight you know bud low power yeah 00:08:33.060 --> 00:08:40.740 low power which is really important in a in a mobile device you get to plug it 00:08:38.520 --> 00:08:44.039 into the wall oh yeah no no we couldn't run this off of this steam deck battery 00:08:42.240 --> 00:08:49.200 because it's AC you can get lower voltage versions that would probably 00:08:45.660 --> 00:08:51.120 work back oh God so there's part of here 00:08:49.200 --> 00:08:57.240 no I'm not even what that do you know how to hold a steam bag okay yeah maybe 00:08:54.540 --> 00:09:00.660 this one oh my God Alex you knew you were gonna do this didn't you oh my God 00:08:58.920 --> 00:09:04.680 okay let's not do that you just clamped onto the screen of a steam deck do you 00:09:02.940 --> 00:09:09.360 know how few working steam decks there are in the wild none work better than 00:09:06.360 --> 00:09:11.399 this one so don't ruin it this is the 00:09:09.360 --> 00:09:15.839 best cooling solution we've ever had on this steam deck it's the worst one so 00:09:13.560 --> 00:09:19.019 low power while I tool around and do maternal to 00:09:17.580 --> 00:09:23.399 heat this boy up Alex is going to explain more about the construction of 00:09:20.820 --> 00:09:27.420 our piezoelectric fan our goal is less than 63 degrees which is what we got 00:09:25.620 --> 00:09:32.160 with our 40 millimeter Noctua it's basically just a circuit board fiberglass you have your two 00:09:30.120 --> 00:09:35.760 piezoelectric Ceramics which are just thin little things instead of putting 00:09:33.959 --> 00:09:41.399 copper in your circuit board you put those in smack it together whole thing 00:09:39.720 --> 00:09:45.600 sorry I didn't mean to interrupt if they made a lot of them could be very very 00:09:44.100 --> 00:09:51.600 cheap yeah I was going to say so what's the issue it's the Precision manufacturing or no uh just they make 00:09:50.220 --> 00:09:56.279 very few of them they actually mentioned that they really like it when videos like this come out because a bunch of 00:09:54.720 --> 00:10:00.360 people buy them just for tooling around with them like us apparently there are a 00:09:58.080 --> 00:10:04.800 few on the space station which is pretty cool because while on Earth convection 00:10:02.519 --> 00:10:08.580 happens naturally when air gets hot it gets less dense it rises letting cooler 00:10:06.480 --> 00:10:13.860 replace it in zero gravity though that hot air just stays there around whatever 00:10:11.519 --> 00:10:18.420 is producing heat so a piezoelectric fan is a super low power way to simulate 00:10:16.560 --> 00:10:22.320 convection in talking to me day though they were like yeah we have some fans 00:10:20.279 --> 00:10:25.260 deployed for zero gravity but those volumes are so low it can hardly allow 00:10:24.120 --> 00:10:29.760 you to run a business fair enough quite a few then are also 00:10:27.899 --> 00:10:34.019 used for sensors like temperature sensors smoke detectors chemical 00:10:31.800 --> 00:10:38.040 detectors and so on and so forth by gently moving air across the sensor you 00:10:36.060 --> 00:10:42.180 can significantly reduce how long it takes for something to get detected and 00:10:40.019 --> 00:10:46.920 once again the super low power draw means that a sensing unit can be battery 00:10:44.220 --> 00:10:52.500 powered one other benefit this fan has over a traditional fan is the start and 00:10:49.260 --> 00:10:54.600 stop time it is blowing air within 00:10:52.500 --> 00:10:58.980 milliseconds of being powered on and stops almost instantly when power is 00:10:56.940 --> 00:11:05.160 removed and one situation this can be very useful is for lasers this is the 00:11:02.220 --> 00:11:10.200 chiller that keeps our laser tube cooled but even though it keeps our laser tube 00:11:07.740 --> 00:11:14.820 within a couple of degrees on etching jobs a couple of degrees can be enough 00:11:12.240 --> 00:11:20.459 to noticeably change the darkness of the Etch in some highly Advanced lasers then 00:11:16.920 --> 00:11:22.680 they'll have both heaters and these fans 00:11:20.459 --> 00:11:28.920 to control the temperature to within one hundredths of a degree and finally they 00:11:25.260 --> 00:11:30.839 do get used to cool Electronics just not 00:11:28.920 --> 00:11:36.839 in this application now we actually maxed out at 50 degrees Celsius on our 00:11:33.060 --> 00:11:38.880 CPU I have no idea how that works maybe 00:11:36.839 --> 00:11:44.519 we're utilizing more of the heatsink well but also like our other fan it was 00:11:42.240 --> 00:11:48.180 off the whole time oh damn yeah like it's actually working pretty well 00:11:46.079 --> 00:11:52.680 normally not in an application like this though normally in a sealed container 00:11:50.100 --> 00:11:56.579 just to create a any bit of airflow for the poor low power chip that's going to 00:11:54.360 --> 00:12:00.839 the deep sea or somewhere equally unpleasant for electronics you know 00:11:58.920 --> 00:12:05.040 what's never unpleasant though my Segway to our sponsor 00:12:02.399 --> 00:12:09.060 vessi vesi proves that waterproof shoes don't have to be ugly or uncomfortable 00:12:06.779 --> 00:12:14.040 thanks to their dimatex technology you can keep those toes dry while remaining 00:12:11.040 --> 00:12:16.200 Sleek snug and stylish I love Sleek toes 00:12:14.040 --> 00:12:20.820 need even more comfort and breathability the everyday move line has added padding 00:12:18.540 --> 00:12:25.620 at the midsole and a looser knit to keep up with their busy active lifestyle do 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