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Ultrathin business card runs a fluid simulation

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81–90 of 234 posts

Re: Ultrathin business card runs a fluid simulation

#81
post #6

Would love to see more information about how it was built. He must have worked with a company that can do the surface mount assembly?

Yeah, wondering how the LEDs were aligned so precisely. Some kind of silicone grid-like jig to hold them while the solder reflows? Or is it just pick & place robotics doing what they do with precision?

The surface tension of the solder will pull them into alignment if the pad shape and solder volume are correct.

Re: Ultrathin business card runs a fluid simulation

#83
post #75
post #39

Earlier quoted context omitted.

>He must have worked with a company that can do the surface mount assembly He did (there are centroid files in the production folder, which tell the board house where to put the components), but you'd be surprised at how possible it is to assemble something like this by hand. You won't believe me, but I find it easier than through-hole soldering (because you don't have to keep flipping the board over). But there's a…

Indeed, JLC for this one, though I did start off by hand assembling the first version with a 3D printed jig to locate the LEDs.

No need to reinvent the wheel. Hand assembling all those leds looks like a nightmare.

Re: Ultrathin business card runs a fluid simulation

#84
post #76

If they used a sans-serif font then they would have nailed it

That and the overlapping silkscreen hurt to see, but otherwise a super cool project. Although they're very minor things that don't technically matter, it can give off certain impressions to people.

Re: Ultrathin business card runs a fluid simulation

#86

Very nice, but probably a bit too expensive to just hand out. I knew a chap that had a similar hardware business card (I don't remember exactly what it did, but it wasn't as cool as this one). I remember that his card was pretty scuffed up, and he insisted I give it back, after he handed it to me. Bit weird.

I'd include a sad tomagotchi that after a week or so guilt tripped you into giving it back, its heart broken, missing its original owner.

That’s a funny way to try and get people to get back in touch with you, haha.

Re: Ultrathin business card runs a fluid simulation

#87

If you like this, you'll also love Mitxela's fluid simulation pendant [0], and likely all of his work! I'm consistently astounded by how informative and enjoyable his stuff his. He shares so much, so freely and it's so well produced, with a lovely voice to boot. Inspirational! Watch his vids, read his write-ups or both! We need more people like this. [0] https://mitxela.com/projects/fluid-pendant

The circle works much better for the fluid simulation.

And now I can’t stop thinking about those circular LCDs and OLEDs they sell in China as (evidently if unofficially) devboards for not-overly-smart watches, thermostats and such.

Re: Ultrathin business card runs a fluid simulation

#88
post #32

Earlier quoted context omitted.

[flagged]

Yeah but I guess they wanted to add something in the value for everyone of us while they didn't have ofc the whole knowledge to do so. their heart might be in the right place tbh. But that's my 2 cents.

ChatGPT actually puts your comment’s value at about 3 cents - darn inflation!

Re: Ultrathin business card runs a fluid simulation

#89
post #79

Earlier quoted context omitted.

Yeah but I guess they wanted to add something in the value for everyone of us while they didn't have ofc the whole knowledge to do so. their heart might be in the right place tbh. But that's my 2 cents.

>But that's my 2 cents. Or is it really ChatGPTs 2 cents? Copy-pasting LLM responses is as useful as posting a "let me google that for you" link. It's a lazy response at a minimum.

It’s better than that because it includes the content - more akin to searching and putting the result you find in the comments as a guess.

The anti AI HN comments are the new anti Bitcoin - your replies are much worse than someone sharing the gpt output.

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