8 ms·
Fluid Simulation Pendant
- asplake 2y agoCharlieplexing:https://en.m.wikipedia.org/wiki/Charlieplexing https://en.m.wikipedia.org/wiki/Charlieplexing
- arilotter 2y agoI learned recently that Charlieplexing is kind of like the discrete version of the Radon Transform: https://en.wikipedia.org/wiki/Radon_transform https://en.wikipedia.org/wiki/Radon_transform
- Archit3ch 2y agoDoes it send MIDI?
- byearthithatius 2y agoOr we could just fill the same container with....water
- CamperBob2 2y agoI'd be tempted to fill it with water with something dissolved in it to make it more conductive (and probably more viscous), and include LEDs whose brightness and/or color reflects the conductivity at their location. The rationale being, why should I do all that math when Nature will do it for me?
- lopis 2y agoIsn't that precisely his first idea? A device containing a conductive liquid (mercury) that takes care of closing the circuits and the turning on the LEDs.
- burnte 2y agoWater is a lot less luminescent than LEDs. I think the effect might be reduced if changed to a water based display.
- addled 2y agoWhat about a fluorescent dye with one (or few) UV LEDs on the edge facing inward to illuminate it? Maybe not “better” than OP’s design, but could be interesting in its own way.
- coolius 2y agoi was wondering whether this could be hardware accelerated.
- ImHereToVote 2y agoAt such a small scale it will not slosh around satisfyingly.
- LolWolf 2y agowait, this is amazing ! I am tempted to make a slightly sillier version of this w/ a circular lcd rather than the uhh retro-cool smt leds honestly just to avoid the multiplexing design great work!! super cool
- mncharity 2y ago> access to a lathe is a fundamental human right A teacher once told me their (middle? high?) school was the last in their state with lathes. Something which couldn't be created there today, and couldn't exist now in some other states, but which had been repeatedly grandfathered, since its creation with many others, just after World War 2. And that it would disappear upon the first serious accident, leaving none at all.
- bsder 2y agoAccess to a CNC mill and a CNC lathe should be a fundamental right. Being CNC with an enclosure mitigates 99+% of all the safety issues and makes them 1000% more useful. With CNC, the most harmful injury is likely to be a broken bone because you're only in the envelope with servos active but not the spindle. With manual, the spindle or chuck can grab you and kill you or send shrapnel into you. And I really wish we had a good, open source pick and place. Those still can't handle 0201 components and higher density BGAs even though those PCBs are really cheap nowadays.
- nox101 2y agoI really wish they'd repurpose public libraries for this.
- int0x29 2y agoNo we need public libraries
- RunningDroid 2y agoRumor has it some libraries have added makerspaces
- mncharity 2y agoI've seen a Massachusetts public library with an associated hacker space (sewing machines; 3D printers), and another with a "tool lending library" (including a battery drill, IIRC?). And have read of European libraries with a "be a general community space" vibe. So that seems plausible at least.
- ayoubd 2y agoI really love mitxela's project ideas and process videos, I recommend checking out his other projects as well
- NKosmatos 2y agoYeap, Tim is some serious maker/tinkerer/creator. Besides the very good hardware things he makes, there are also some other software stuff: https://mitxela.com/other/ https://mitxela.com/other/
- CamperBob2 2y agoThe HN guidelines say not to complain about the formatting or presentation of the article, but often the page design is so insanely terrible that someone can't help but post a complaint about how they couldn't read it because X, or how it didn't work on browser Y, or how the information density was so annoyingly low it wore out their mouse or pointing finger, or... This isn't one of those posts. Good job to the author. This article is not only nicely written but also a pleasure to read.
- Swoerd 2y agoI would love to see a version with wireless charging, though that might be tough with the all metal enclosure, perhaps it could be done through the front/screen section. Also, adopting the screen off function Apple watches use could be a cool addition, for that it would need a light sensor. On an Apple Watch, you can switch the screen off by simply covering the screen with your hand.
- ImHereToVote 2y agoI think a plastic housing might look really nice TBH.
- polishdude20 2y agoThis is super cool! I love the simulation aspect of it. On the same note, I've been working on a bike POV display with lots of LEDs and just got "live-ish" video working over wifi with it: https://youtu.be/hxAHBvuyqpY?si=8XraFuG_Fi54Bs7T https://youtu.be/hxAHBvuyqpY?si=8XraFuG_Fi54Bs7T
- mattmar96 2y agoOoo nice! Looks sweet
- nox101 2y agoAwesome! I hope you'll post some write up or something on how you did it!
- polishdude20 2y agoThat is to come! Once I get it working the way I want it haha. Wifi is tricky and I seem to have lost the code that made that video work and I reflashed with old code that doesn't work :( Back to the drawing board
- leephillips 2y agoSo, so beautiful. I was shocked at the price. I was expecting something about 10x what he's charging.
- ge96 2y agodang, great video and nice write up I can see a good video as far as show/don't tell my stuff is dry/way too much info. Guess it depends verbatim tutorial vs. just showcasing.
- elcritch 2y agoFascinating that with such a simple simulation you can see grain boundaries like those in metals forming. Look at the second image, those are almost identical to what they looked like in our material science courses.
- m3kw9 2y agoput diamonds on top of those LEDs and you can sell it to rappers.
- fitsumbelay 2y agothe whole mitxela store is t-i-g-h-t the metal shop close-ups are zomg :salivating-face: ...
- deleted 2y ago[deleted]
- tantalor 2y agoI would not use "prototype" to describe this as he did.
- titanomachy 2y agoOne sense of the word is “a first full-scale and usually functional form of a new type or design of a construction” (Webster)
- brcmthrowaway 2y agoThe led screen is disappointing
- adriand 2y agoFascinating video. I watched almost the whole thing without planning to, I got sucked in. This is one of those examples of software that reminds me of my struggle to understand how LLMs are passing code evaluations that culminate with people declaring that they are now better than even the best human coders. I have tried to get LLMs (specifically, Claude and ChatGPT, trying various models) to assist with niche problems and it's been a terrible experience. Fantastic with CRUD or common algorithms, terrible when it's something novel or unusual. The author creates his own version of a "FLIP simulation". I'm going to go out on a limb and posit that even ChatGPT's unreleased o3 model would not be up to the task of writing the software that powers this pendant. Is this incorrect? I realize perhaps that my comment is a little off-topic given that this is not an AI project. However, this project seems like an excellent example of the sort of thing that I am quite skeptical the supposedly "world-class" artificial software engineers could pull off.
- hackernewds 2y agoYou could go and try it out. You'd be surprised how capable the LLMs, specifically Claude are now at creative projects such as this
- UltraSane 2y agoClaude is pretty good at writing Python programs.
- Kiro 2y agoI've implemented fluid mechanics using Claude (through Cursor) and it had no problem writing the logic and integrating it using my custom physics engine and custom renderer. So no, I don't think your assessment is correct. LLMs shine when they get to implement something from scratch on a blank slate with clear API boundaries, whether it's a CRUD app or a physics simulation. Where I think they struggle the most is in big legacy codebases on tasks spanning multiple modules with lots of red herrings.
- derbaum 2y agoThe "issue" with saying an LLM can't do this is that CFD simulations are not actually that niche. Many university courses ask their students to write these types of algorithms for their course project. All this knowledge is present freely on the internet (as is evident by the Youtube videos that the author mentioned), and as such can be learned by an LLM. The article is of course still very impressive.
- neumann 2y agothis is so incredibly impressive. I find projects and the people who do this so inspiring and also deflating because while I can appreciate the work ethic and polymath skills needed for this I couldn't recreate this. I'll just have to hang back and appreciate. Any other similar creators with this level of polish (pun intended) and interests to follow?
- zonkerdonker 2y agoIf you're into the custom PCB design, I highly recommend Carl Bugeja: https://youtube.com/@carlbugeja https://youtube.com/@carlbugeja He has lots of super interesting projects using micromagnetics, motors, flappers, and the like. If you liked the part where he machined the housing, check out Clickspring. I think it's fair to say he is the greatest machinist currently active on YouTube, both in videography and storytelling, and in actual skill. https://youtube.com/@clickspring https://youtube.com/@clickspring
- JKCalhoun 2y agoDon't be deflated, get started.
- _def 2y agoI second this. I bet the creator of this would be bummed to read this - it's not like their skills came from out of nowhere, just because they're humble about it.
- neumann 2y agoI do my own little hacking project that I enjoy - and definitely where I sink my spare time when I can carve it out! But this level of dedication and final result can be very humbling.
- Hubix 2y agoI of course don't know your specific circumstances, but nonetheless I'd like to recommend you the author's own take on their work described in a rant titled "Spare Time and Hard Work". It's available here: https://mitxela.com/rants https://mitxela.com/rants (unfortunately It's not possible to link directly to it so you'll need to scroll a little bit down to find it) I personally like coming back to it from time to time, since it's inspiring in it's own way for me.
- JKCalhoun 2y agoWeirdly I am drawn to his previous idea of using an actual liquid (mercury) to trigger the LEDs. So much simpler to lay out in KiCad, no 4-layers required....
- londons_explore 2y agoThose LED's could have been packed much closer together if one was willing to have adjacent LED's share a single pad. Since the LED's are all the same component and therefore heat at the same speed in the oven, I don't think that would cause tombstoning.
- ionwake 2y agoIs this for sale? Its so cool
- illwrks 2y ago£1k, on his website he has a link.
- deleted 2y ago[deleted]
- albus0x 2y agoSuch a cool project. The only thing - I wish LEDs were blue
- solardev 2y agoThis is the only piece of jewelry I've ever seen that I immediately crave. Wish it were still on sale!
- fasten 2y agoThis project is an incredible mix of artistry and engineering. the attention to detail in both the fluid simulation and the hardware design is mindblowing(especially the clever use of charlieplexing to optimize LED placement congrats!!