Tiny volumetric display

this is my prototype of a very small volumetric display we've got an LED Matrix at the top bunch of electronics underneath IR sensor aure 2450 battery in the middle and then the motor from a CD drive at the bottom problems you normally encounter with building a volumetric Persistence of vision display are things like bushings and slip Rings how do you get the power and data to the moving parts and I've avoided all of that just by spinning everything even the motor and the battery here's a static test image or test volume it's just a janky low resolution wireframe Cube but as I rotate it you can see it genuinely is a 3D display next up we can animate it just rotating the cube in the awkward plane and next we've got uh fluid simulation this is pre-rendered It's Manta flow just some glowing liquid sloshing slushing about in a cylindrical container and it's not very high resolution but proves the concept it works I had had planned to machine a heavy weight to go at the bottom but so far this laser cut bit of delin seems to be doing just fine it's no coincidence that this is roughly the size and shape of a tealight candle the original idea was to build a virtual candle with a holographic flame that could be seen from any angle this is my first attempt oh this is my first attempt at flame simulation and need to tweak the parameters a bit currently looks less like a candle and more like a very small bonfire I won't deny this is a very satisfying result for what is a hastily thrown together prototype I honestly wasn't expecting it to work at all for the next version I'll put all of the electronics on a circuit board and fix the battery holder you can see I've had to add a rubber band to stop it flying out while the thing is spinning uh we can make the display higher resolution just add more LEDs but the main Improvement will be if we can get those LEDs centered you see each voxel is illuminated twice as it rotates but it's quite hard hard to get those illuminations to line up we need those LEDs to be on the center line but instead the board holding them is on the center line so if we just shift that over that should correct for it but in that situation it then becomes quite unstable as it rotates so I think it should be enough to just add a weight to balance it but whether adding a weight at the base is going to compensate for an instability at the top remains to be seen in the process of filming this video I've twice dropped this thing on the floor and the LED alignment gets worse every time I glue it back together it's just so tempting to hold it in your hands while it runs though maybe it needs some kind of transparent cover that would protect it look a bit like a Nixie tube as always there's more information on my website mel. comom

Channel: mitxela

Views: 2,684,027

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Id: HKpBhE7QVAI

Length: 5min 23sec (323 seconds)

Published: Fri Dec 01 2023