Reminds me of this 20Q toy I had as a kid:
https://youtu.be/2C1No7cv84o?si=xAFibiv9LeVxM-rF
Tiny volumetric display
101–110 of 180 posts
Re: Tiny volumetric display
#102Earlier quoted context omitted.
I think OLEDs might have a refresh rate issue. The nice thing about LEDs is that you can drive them at a very high refresh rate.
Don’t oled displays support pretty high refresh rates? And also have way lower GtG latency?
with this kind of spinning display you'd need to multiply the frame rate you want by the angular resolution you want.
So if you're happy with only 20 different angular views and only a 20fps refresh rate of the 3d display then that's 400fps required of the flat display
Re: Tiny volumetric display
#103Creative. I probably have the persistence and interest to pull something like this off, but I lack the fantasy to come up with such cool projects. Luckily there's the internet to see what impressive stuff people come up with.
I have the reverse issue, I am constantly coming up with creative ideas, so that by the time I am done building idea A prototype v1 (something like what you see in this video) or v2, idea B comes along and distracts me from seeing idea A all the way through. And when the persistence and discipline is there, bills need to be paid, and the distraction is not idea B, but merely some mundane work.
I solve it like this: when at work the soldering iron is in the garage. That little barrier helps a lot when temptation to tinker strikes.
One thing that I really like about this site is that the creator spends a ton of time on documenting it all. I am usually so busy with projects I don't get around to it. Another problem is that, especially for larger projects, that you need to store and maintain them. And that gets old pretty quickly when you're lugging around 200 pound windmills and such.
Re: Tiny volumetric display
#104Earlier quoted context omitted.
Free time is an excuse for most people - I'm not calling you out because I don't know you but most people spend a lot of time on YouTube - Hn - Watching TV etc and they could be working on a cool project instead.
He even has entry on this topic: https://mitxela.com/rants (scroll down to "Spare Time and Hard Work")
His work is even more inspirational after reading this rant, as he describes the therapeutic aspect of his projects and his base emotions.
Still, I can't help but excuse my inferior output by admiring his incredible fine motor skills and pre-existing expertise in electronics.
Re: Tiny volumetric display
#105holy hell is this guy productive. it is worth scrolling through the various one-off projects he has completed and documented: https://mitxela.com/projects
I feel like a bit of an incompetent after looking through all that.
Just a catalogue of all the skills on display is already the stuff of a couple of lifetimes.
Re: Tiny volumetric display
#106Earlier quoted context omitted.
He even has entry on this topic: https://mitxela.com/rants (scroll down to "Spare Time and Hard Work")
His work is even more inspirational after reading this rant, as he describes the therapeutic aspect of his projects and his base emotions. Still, I can't help but excuse my inferior output by admiring his incredible fine motor skills and pre-existing expertise in electronics.
Those fine motor skills will go though, use them while you have them! Especially for fine soldering work you need a very steady hand and that which used to be trivial suddenly is a real challenge.
Re: Tiny volumetric display
#107Make an acrylic cube or a sphere, put inside a projection surface that's able to rotate around one axis. Pump the air out for it to be silent and to be able to use a really thin sheet. Spin it with an external magnetic field. Project the distortion-corrected and spin-synchronized image to it with 2-3 projectors under different angles. Bang, you have your own Star Wars display that's entirely doable by a hobbyist.
Cool! Can you do this and write up the steps like the article?
Re: Tiny volumetric display
#108Many years ago, someone did a similar holographic hack with a spinning hard drive motor, a piece of reflective plexiglass mounted upright on it, and a small projector. As the plexiglass carved out a cylinder, the projector sent a series of frames adjusted for each little slice of 3D space. [0] This gave me a wild idea: what if you could encode a low-resolution 3D video on the left channel of a stereo vinyl groove? [1…
There's no "Left Channel" on a stereo vinyl groove. There's an A+B channel (horizontal) and A-B Channel (vertical). Left and Right are created electronically from these two signals.
Right, I forgot this detail. Thanks for the correction.
Re: Tiny volumetric display
#109Many years ago, someone did a similar holographic hack with a spinning hard drive motor, a piece of reflective plexiglass mounted upright on it, and a small projector. As the plexiglass carved out a cylinder, the projector sent a series of frames adjusted for each little slice of 3D space. [0] This gave me a wild idea: what if you could encode a low-resolution 3D video on the left channel of a stereo vinyl groove? [1…
There's a low tech version of the vinyl hologram: https://youtu.be/aEbAaL7fPl4
Different but pretty cool idea!
Re: Tiny volumetric display
#110Many years ago, someone did a similar holographic hack with a spinning hard drive motor, a piece of reflective plexiglass mounted upright on it, and a small projector. As the plexiglass carved out a cylinder, the projector sent a series of frames adjusted for each little slice of 3D space. [0] This gave me a wild idea: what if you could encode a low-resolution 3D video on the left channel of a stereo vinyl groove? [1…
> assume this wild idea isn't feasible given vinyl data rates? Data rates go up if you spin the disk faster, and can get fast enough for 2D video. I don’t think it was vinyl, but https://en.wikipedia.org/wiki/Television_Electronic_Disc : “Program information was stored in the form of ridges in the surface of a thin, flexible foil disc, which was claimed to be sufficiently robust to withstand being played 1,000 times.…
Amazing, first I've heard of this. Here's footage of someone playing a Television Electronic Disc: https://youtu.be/XkP4ZJnMVOs?si=QbT4EXrE1dpq-Rtz