Live data from Hacker News

Ultrathin business card runs a fluid simulation

github.com

221–230 of 234 posts

Re: Ultrathin business card runs a fluid simulation

#221

Earlier quoted context omitted.

I am thinking how most of the people I get business cards from are people I've already invited in to my office and are discussing some potential business relationship. They've often flown to my city, staying in a hotel, paying for transport, meals, etc. The impression they make during that 1 hour meeting is paramount and I think this is certainly going to leave a lasting impression. Most of those business cards just…

This matches my experience fairly accurately except for the one guy I met at a housewarming who handed out cards to everyone . It was so weird - I haven’t seen anyone do that in real life. He had a shop that repairs chipped windshields. And you know what? About 8 months later my windshield got sprayed by gravel. That guy got the business (he’s a friend of a friend after all, and I had his number in my wallet). I’d sa…

Definitely still a market for regular cheaper business cards for stuff like this. I regularly keep cards of people like this were I might need their service in the future, but they don’t need to be fancy at all and I don’t think it really adds much value when they are. The market for “good service” in trade type labor that I’d always hire a guy I have even a weak social connection with over some random person I found online. I feel like there’s a higher chance of them not price gouging and caring about the workmanship.

But, I don’t think he’d be handing out $20 BOM cards that freely. I was more validating that there is still probably a market of people where $20 cards might make sense. As in the example I posed, a business card isn’t providing any additional information. By the time I meet these people in my office, we’ve already exchanged emails and had some conversations on the phone and are acquainted. That’s what led to the in-person meeting. I know their names and have them in my contacts.

But, just as it felt like a social faux pas to receive a business card at a housewarming party, I think it also feels like a faux pas to meet someone in a business environment (where you are the selling party) and not give out a card during the initial first handshake interaction. This is a pretty low volume and high value moment for that person so a $20 card is no big deal and could easily make sense.

Re: Ultrathin business card runs a fluid simulation

#222

> board edge usb-c port This is awesome. I bet we see a lot of these in the future once people realize it's possible to have a USB-C port on your board with no extra parts and zero soldering.

I thought this was one of the most impressive parts of the design, had no idea this was possible.

Re: Ultrathin business card runs a fluid simulation

#223

Surprise no one's mentioned yet that the firmware is written in Rust. As someone who's struggled with getting started with embedded Rust (the landscape seems to be changing quite a lot?) it looks like a good example. Also it's a bit startling to see floating-point code used so freely. Shows how rapidly the capabilities of MCUs have developed. 15 years ago, doing floating point on a microcontroller would be unspeakabl…

Yeah embassy has improved tons recently. This is because embedded Rust is receiving a lot of investment from industry, embedded engineers desperately want a real C alternative there.

Re: Ultrathin business card runs a fluid simulation

#225
post #191

>Amazing project, but the font on the back of the card is gross. >It sort of reminds me of those research professors that have received multiple awards and their website is an unstyled HTML page with 4 links >If they used a sans-serif font then they would have nailed it >this particular serif font was also a poor choice out of the variety of serif fonts out there >that's awesome, but i think since it's a business car…

A few business card typography tips off the top of my head: — White on black (inverse) is less legible, so all else equal compared with black on white the font should be bolder and/or bigger for equivalent readability. (Using caps or small caps is also OK in display text like titles, if it reads easier.) — Legibility is also impaired by visual noise around the text (it’s not a single color but there is some pattern,…

Is this any better? I hid the vias

https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me...

https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me...

Re: Ultrathin business card runs a fluid simulation

#226
post #225

Earlier quoted context omitted.

A few business card typography tips off the top of my head: — White on black (inverse) is less legible, so all else equal compared with black on white the font should be bolder and/or bigger for equivalent readability. (Using caps or small caps is also OK in display text like titles, if it reads easier.) — Legibility is also impaired by visual noise around the text (it’s not a single color but there is some pattern,…

Is this any better? I hid the vias https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me... https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me...

I personally think it is better and I like it a lot more. On the other side the concise “Shake Me” is fun, and “Powered by Rust” makes sense there. Curious how would it look when in physical form…

Re: Ultrathin business card runs a fluid simulation

#227
post #225

Earlier quoted context omitted.

Is this any better? I hid the vias https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me... https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me...

I personally think it is better and I like it a lot more. On the other side the concise “Shake Me” is fun, and “Powered by Rust” makes sense there. Curious how would it look when in physical form…

Thanks for all the help. I'll be ordering this soon and I'll be sure to post it.

Re: Ultrathin business card runs a fluid simulation

#229
post #208
post #152

Earlier quoted context omitted.

I tried, that's why it's 21x21. Still haven't managed to get it to read.

I might be wrong, but you might need need (at least) a 23x23 LED matrix to have a white border around the outside to give it the contrast needed (the "quiet zone", since QR data is black).

This is why my first prototype had a white border around it. The LEDs were red back then, so I don't know exactly what I was thinking, but I was aware of the problem.

https://github.com/Nicholas-L-Johnson/flip-card/blob/main/me...

Post reply on HN