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Tiny volumetric display

mitxela.com

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Re: Tiny volumetric display

#131

Post by oh_sigh »

BenjiWiebe wrote: post #113
mistercow wrote: post #25

Earlier quoted context omitted.

Tom 7 mentioned a thing in one of his videos, which is to keep a list, and write down every idea when you think of it, regardless of how stupid it is. Winnowing is for later. That way, when you have the energy to work on a project, you don’t have to waste it on coming up with an idea. It really makes a huge difference in what you can get done with side projects. You probably have more interesting ideas than you think…

I have the inverse problem. Do you have any advice for me? I have no problem coming up with, and remembering, cool projects. I just rarely have the energy or the lasting enthusiasm to actually follow through.

I would start working on one if I were you.

Re: Tiny volumetric display

#132

Post by doubleg72 »

dekhn wrote: post #117
drcode wrote: post #115

Earlier quoted context omitted.

The innovation is spinning the entire computer, instead of just the display, reducing complexity

It seems more likely that a mechanical engineer would end up using a slip ring, so the computer doesn't need to spin.

This is exactly what would be used, a Moog slip ring.

Re: Tiny volumetric display

#134

Post by jacquesm »

stavros wrote: post #129
jacquesm wrote: post #120

Earlier quoted context omitted.

I'm just too easily distracted. I start on a thing that I think will take five minutes, next thing I realize that it's 7 am, birds are tweeting and there is a stone cold cup of tea sitting next to me and a bunch of non-priority stuff done (but it's so much more fun...). Most dangerous times: when the administration needs to be brought up to date for the tax man. Then I really have to force myself. Fortunately I've be…

Isn't it great how you grab the soldering iron (or whatever) at 2 am for a quick thing, and five minutes later it's 7 am?

Just that... and here I am... 4:40 and not a soldering iron in sight :) Off to bed!

(Ear training exercises are fun. I just built an ear training module into the beta of pianojacq.com and it's a hoot, what's also interesting is that it seems to have an immediate effect on playing ability, I really didn't expect that)

Re: Tiny volumetric display

#135

Post by stavros »

jacquesm wrote: post #134
stavros wrote: post #129

Earlier quoted context omitted.

Isn't it great how you grab the soldering iron (or whatever) at 2 am for a quick thing, and five minutes later it's 7 am?

Just that... and here I am... 4:40 and not a soldering iron in sight :) Off to bed! (Ear training exercises are fun. I just built an ear training module into the beta of pianojacq.com and it's a hoot, what's also interesting is that it seems to have an immediate effect on playing ability, I really didn't expect that)

That seems interesting, too bad I don't have a MIDI device (or any musical ability, but that's less important) to try it out...

Re: Tiny volumetric display

#136

Post by mhb »

sowbug wrote: post #53

A couple ideas for improvement. If you have extra identical motors and disassemble two, you can fashion a rotating power transmission system from the brushes in two assemblies. You sacrifice two motors for each unit, but it's a perfect fit and very reliable (with a cap and rectifier), and you don't have to worry about batteries anymore. The rectifier also provides a signal that the assembly has completed a rotation,…

What about keeping the motors intact and using the second as a generator?

Re: Tiny volumetric display

#137

Post by defterGoose »

sowbug wrote: post #53

A couple ideas for improvement. If you have extra identical motors and disassemble two, you can fashion a rotating power transmission system from the brushes in two assemblies. You sacrifice two motors for each unit, but it's a perfect fit and very reliable (with a cap and rectifier), and you don't have to worry about batteries anymore. The rectifier also provides a signal that the assembly has completed a rotation,…

That's all true, but I liked his solution of using an IR sensor for the sync. It was so cool how he was able to rotate the display by changing the position of his finger. No guessing involved.

Re: Tiny volumetric display

#138

Post by strogonoff »

jacquesm wrote: post #72

This is a really neat little project. Make sure to check out the other ones, some of which have been featured on HN before: https://mitxela.com/projects/hardware Personal favorite: the MIDI slide whistle.

The headphone amp[0] project reminded me of the book Schiit Happened a little.

[0] https://mitxela.com/projects/headphone_amps

Re: Tiny volumetric display

#139

Post by abdullahkhalids »

BenjiWiebe wrote: post #113
mistercow wrote: post #25

Earlier quoted context omitted.

Tom 7 mentioned a thing in one of his videos, which is to keep a list, and write down every idea when you think of it, regardless of how stupid it is. Winnowing is for later. That way, when you have the energy to work on a project, you don’t have to waste it on coming up with an idea. It really makes a huge difference in what you can get done with side projects. You probably have more interesting ideas than you think…

I have the inverse problem. Do you have any advice for me? I have no problem coming up with, and remembering, cool projects. I just rarely have the energy or the lasting enthusiasm to actually follow through.

Find a partner who gives energy to you, and who you give energy to. Not always easy to find, but if you do, then its easier to work on stuff like this.

Re: Tiny volumetric display

#140

Post by pyinstallwoes »

krenzo wrote: post #130
amelius wrote: post #126

Earlier quoted context omitted.

Another idea: why not put a tiny TFT display on the motor? You can get cheap ones at aliexpress.

Standard displays are 60 Hz. You need a much higher framerate because not only do you want 60 frames a second, but you also want some number of frames per angular rotation. For 1° of angular resolution, you would need: 360°*60 Hz = 21,600 Hz display. Liquid crystals can be modulated at KHz speeds, but you're not going to find associated driving circuitry to do that. It's not easy, and there's no demand for it. A TI D…

You seem to know a lot about this. Have you worked on similar things?
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