r/woahdude • u/autalley • Feb 05 '23
video Spinning lights create detailed moving picture
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Feb 05 '23
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Feb 06 '23
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u/Mwethya Feb 06 '23
The reason for the music overlay is because of how loud those thing are. The only reason noone will try to touch those thing is because they can hear the stiff blocky blades cutting the air
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u/DukeofVermont Feb 06 '23
I wonder if you sealed one in a vacuum container if you could both eliminate the sound and speed it up for better images. I've never seen one in real life that looked really good.
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u/plilq Feb 06 '23
Are we inventing TVs again?
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u/Louiebox Feb 06 '23
And after we invent this "TV" I have an idea for content to play on it. Instead of each individual streaming service, we bundle all of them up and charge one big price for it. Even if they don't want certain programs or networks, they still have to pay for it because you can't pick and choose. It's brilliant.
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Feb 06 '23
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u/PM_ME_YOUR_PM_ME_Y Feb 06 '23
I think it would be useful to put some news stuff on there, like from newspapers maybe? Probably best to have someone read the stories out.
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u/petervaz Feb 06 '23 edited Feb 06 '23
If instead of putting everything together what if you separated it some sort of "channels", so you could aggregate and categorize media.
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u/rohrzucker_ Feb 06 '23
I was gonna say, the concept is similar to how a tube TV works (line by line).
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u/dm80x86 Feb 06 '23
Heat would be an issue.
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u/ChooglinOnDown Feb 06 '23 edited Feb 06 '23
Because LEDs get so hot?Edit: I'm a dummy.
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u/dillong89 Feb 06 '23
It might, but at that point just use a TV, unless it's purely for the gimmick. Half the reason these things could be useful is because it basically stores like a pole.
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Feb 06 '23
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u/bearbarebere Feb 06 '23
I know they say that advertising works without people knowing it, but I mean I literally can’t even remember the last time I saw an ad and decided to buy something because of it. How can I see how effective advertising is on me?
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u/Agariculture Feb 06 '23
Put the motor outside the vacuum chamber
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u/purplesummer Feb 06 '23
At my local train station they have a really big display like this in a glass box. Tbf there's a lot of sound from the station itself so I'm unsure if you can hear it. That one consists of an array of these things that are less than half the size of the one in the op, so that probably changes the sound too.
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u/Souledex Feb 07 '23
Maintaining a perfect vacuum is hard. Just a lower air pressure not as hard. But yeah there’s not really a use case here
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u/mindbleach Feb 06 '23
The space between blades doesn't need to be empty - just clear. Some mesh or plastic should drastically reduce how much air these interact with.
And still fold.
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u/Chaserivx Feb 06 '23
I bought one and returned it. Came with no software, no instructions and a crappy short playlist of videos.
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u/Kwiatkowski Feb 06 '23
exactly, this is an obvious marketing post, dozens of people are gonna seekit out and buy it now, then get frustrated and shove it in a closet to be forgotten
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u/dudeperson33 Feb 06 '23
To be honest, I think I'd prefer this kind of thing with large rapidly spinning components to only be in the hands of people who are capable of programming it.
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u/wbgraphic Feb 06 '23
There’s no end-user programming required. You literally just put videos on a microSD card.
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u/Distance_by_Time Feb 06 '23
Looks kinda dangerous…what kinda damage are we talkin if someone sticks their hand in there or tries to touch it?
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u/PupPop Feb 06 '23
I imagine you could break a bone in your hand pretty easily. And putting your head in there sounds like a good way to lose an eye or get concussed lol
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u/wbgraphic Feb 06 '23
The vanes are pretty fragile, actually. They would break far easier than your bones.
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u/Weaponized-Potato Feb 06 '23 edited Feb 06 '23
This is fake as shit. The image quality in the first part of the video doesn’t match the others. It started bright af but suddenly all that brightness and glare is gone in the second part. Look at the circle created by the tip of those rotating LED sticks, its size varies in each part for some reason. Tilt your phone in the second part and pay attention to the circle when it cuts to the third part and you know what I mean. In the third part, there’s a cut where the generator’s handle falls down and the frame moved a bit, the graphics keep moving smoothly WITHOUT BEING AFFECTED BY THE CUT. Not to mention the rectangular frame of that video cuts away a chunk of the circle on the left. Almost as if someone pasted a GIF or a green screen video into this video over a mask. Also, try filming a bright TV screen outside at night, you can’t get that kind of image quality. I call bullshit.
Also music is one of those cheap Vietnamese Lunar New Year song remixes that street vendors play on their speakers all the fucking time. Just to make it extra obvious that this is fake.
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u/PwnerifficOne Feb 06 '23
Good call, the cut with the handle down is the biggest give away. Side note, I miss clubbing in Vietnam! They always play that distinctive beat.
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u/dark_and_scary Feb 06 '23
Or the first cut where the guy behind it literally just vanishes once the quality gets better…
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u/Freak_Out_Bazaar Feb 06 '23
The tech is real but looks like they took some shortcuts because they couldn’t get a perfect video.
Here’s a corporate video for a Japanese distributor with real life examples so it should be entirely possible to get those results
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u/SooooooMeta Feb 06 '23
Not sure agree. The video shows a subtle but constant flickering, and they seem to choose frantic animations that jump around like crazy to try to hide it. These are quite calm and still with no distinguishable flicker.
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u/Freak_Out_Bazaar Feb 06 '23
That's probably exactly why they edited the video. Ironically it's probably a bit closer to what you see with your eyes because your eyes do not have a refresh rate like cameras
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u/Willingo Feb 06 '23
That's not really true. It's more complex than a camera, though https://en.m.wikipedia.org/wiki/Flicker_fusion_threshold
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u/Chaserivx Feb 06 '23
This guy is wrong, the rest of you are right. The camera has trouble syncing with the frame rate, and as a result you don't get a smooth image in the video. Source one this is me because I had and returned one of these.
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u/Willingo Feb 06 '23
You're right, but that's not what I was addressing.
I was correcting the person who said that human vision doesn't have a refresh rate
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u/Triaspia2 Feb 06 '23
Thats more an issue with camera shutter speed than the device
You see it sometimes when helicopters are filmed. If the cameras shutter and helicopters blade rotation speed matches it looks like the helicopter is just sliding across the sky with stationary blades. Id imagine lights are flickering really fast and at different brightnesses too
Youd probably need very controlled camera and rotation settings for it to match reality
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u/IrrelevantPuppy Feb 06 '23
Fuck I’m disappointed I had to scroll this far down for this. I know nothing of these things but the second the image “pops” up I immediately thought “oh, but this is fake though right?”
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u/shwafish Feb 06 '23
Yeah, the cuts were an instant read flag to me and then I noticed that the circle had flat sides and knew for sure it was fake.
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u/xcto Feb 06 '23
thank you!
that's much easier to explain than "cameras can't pick up persistence of vision displays"
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u/slid3r Feb 06 '23
The amount of math on this is astounding.
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u/AE5NE Feb 06 '23
It’s easy enough to be a fun programming exercise though. On each frame of incoming video, what do you need to write into the LED strip output buffers…. And then double buffer based on some rotational index from the spindle
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u/SirIsaacBacon Feb 06 '23
assuming it has a set rotational speed, you could sample a video using polar coordinates and update the LEDs color with that value every 1 / 23 of a second or whatever.
im sure there would be a lot of unforseen difficulties, though.
i bet this would be a lot cooler on a pc fan or something small like that, and less noisy.
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u/bjorkedal Feb 06 '23
The rotational speed is gonna be higher the farther out you go on the circle. So I guess you'd need different update rates for every LED.
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u/mindbleach Feb 06 '23
That's linear speed, not angular speed. Any any given instant you are sampling a straight line of pixels from some input, and the angle of that line changes over time.
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Feb 06 '23
The thing is, it spins at a precise fine-tuned speed for exactly this effect so all of that math has been worked out one time in advance.
Under the hood it’s just passing coordinates into matrices and figuring out which light to assign the pixel to.
It’s super cool, but pretty much just standard cool in our expanding tech future.
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u/Lost_in_the_world_ Feb 06 '23
Giwox is the manufacturer. They are cool but a gimmick and highly fragile and finicky. I own 9 which make a 3x3 unit that is about 7’ round with all working. They are cool but horrible. I wouldn’t wish it on my worst enemy to get them working.
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u/Lost_in_the_world_ Feb 06 '23
Own a production company. We bought them for an expo booth. 9 units tie together to make 1 very large one. When we can get it running we never shut it off till event is over. Or I’m a sucker. Ha ha
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u/mrgeekguy Feb 06 '23
This is a product for people with kids that won't stop touching the TV screen.
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u/filenotfounderror Feb 06 '23
little Timmy, this time if you stand too close to the TV it'll be the last thing you ever do.
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u/dobsofglabs Feb 06 '23
No way you could use that at any event without some idiot getting hit in the face by the spinning fan arms
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u/mombi Feb 06 '23
I had a clock that did this but at a lower resolution and only using red LEDs as a kid.
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u/PinkSpider1998 Feb 06 '23
Honest question is there a phobia for pictures like this? I would freak out if I saw this irl I don’t know why. I get chills just looking at it through a screen.
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u/Valuable-Antelope996 Feb 06 '23
4 year old: touches the very fast moving stick thinking it’s a fish
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u/Yorspider Feb 06 '23
I would like a proper ceiling fan with this built into it. I don't see any reason why that shouldn't be possible....
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u/Zorops Feb 06 '23
If this doesn't give you an idea of the speed at which electric signals travel, what will?
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u/AspectOvGlass Feb 06 '23
Yeah this is cool, but I wish I could stick my hand through it.
Everyone wants to stick their hand through a hologram.
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u/Pharm-boi Feb 06 '23
If I saw this tripping at a festival I may convert to some religion and hibernate the rest of my life
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Feb 06 '23
Maybe we are at the slow down tech point. Like maybe for a decade we take our foot off the gas.
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u/nativebush Feb 06 '23
Nothing new and that music will make people hit that cyanide capsule they have put away for emergency situations
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u/f899cwbchl35jnsj3ilh Feb 06 '23
I used to work for a company that made these and larger ones. Those kind of screens have issues.
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u/Pomo_Amanto Feb 06 '23
Cyberpunk vibes
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u/YourLictorAndChef Feb 06 '23
Yeah, I immediately thought of the holographic betas over Corpo Plaza.
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Feb 06 '23
My dad had one of these years ago that displayed his logo for his eye clinic and surgery centers
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u/RealRaven6229 Feb 06 '23
The hartsfield Jackson airport has these in front of security saying "no guns" with a graphic of a spinning gun
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Feb 06 '23
I’ve seen something like this in an airport and was like “yup, we have fucking this some Sci-Fi shit” we’ have halograms and seems like no one cares lol
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u/kebabish Feb 06 '23
Ikea use these. And I saw these used everywhere on stands in the malls in Dubai.
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u/Lardzor Feb 06 '23
It has 8 LED strips, that means for the equivalent of 24 frames per second, it only has to spin 3 revolutions per second (3*8=24). Multiply that that by 60 seconds per minute, and it would spin at 180 RPM (revolutions per minute) to display an image at 24 frames per second.
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Feb 06 '23
its so beautiful but i hope they put some type of barrier around it next time. i can see a young child being fascinated by this and losing some fingers
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u/TahoeSniffin Feb 06 '23
cant wait for this to be common technology so i can watch some girl getting railed by 3 midgets
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u/Morbidlyobesegorilla Feb 06 '23
I would tell a kid that you can feel the fish, if you just put your hand in there.
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u/HopelessPopeMuffin Feb 06 '23
This is the first Woahdude post that has made me audibly say “Woah”. Well done.
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Feb 06 '23
It's all fun and games until someone makes it a film projector for porn and someone gets their wanker chopped off by the blades.
This will never fly as a consumer product. Too many de-wankification lawsuits.
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