Live data from Hacker News

Hand Drawn QR Codes (2025)

sethmlarson.dev

21–30 of 47 posts

Re: Hand Drawn QR Codes (2025)

#21
post #14

> (besides micro QR codes) In case anyone else is interested: https://en.wikipedia.org/wiki/Rectangular_Micro_QR_Code

this makes me wonder if there is an `infinite` version of QR Code that can be streamed from a printer (well, I guess things can be chunked).

Re: Hand Drawn QR Codes (2025)

#22
post #12

Earlier quoted context omitted.

I found this page very helpful in understanding each step of the QR code creation process. I can't say I recall it all but it would be possible to turn this into a small booklet, I guess. https://typefully.com/DanHollick/qr-codes-T7tLlNi Here's a HN discussion from 2022 about it. https://news.ycombinator.com/item?id=32837565

Nice! I also found this page very helpful: https://www.nayuki.io/page/creating-a-qr-code-step-by-step This is an interactive guide that will break down the process for your specific QR-code.

That's the best explanation I've seen - thanks for sharing!

Re: Hand Drawn QR Codes (2025)

#24
post #17

I saw similar engraved and then inked onto wooden boards at a restaurant, sadly, despite the error handling, 3 out of 4 I tried were not scannable, the 1 I did manage to scan to me to a reviews site for the restaurant (where a lot of reviews said they struggled to make the QR work - likely not the feedback the restaurant wanted)! I guess it kept me entertained whilst waiting for the bill.

There was a tweet a while back where I guy was riding a train in China and took a photo of the QR code for his seat. He mentioned that you can use the QR code to order food and drinks delivered directly to you.

About 5 minutes later there was another tweet from him where:

- someone saw the original tweet (Guy 2)

- scanned the QR code

- ordered the OP a drink

- added a note to the order saying it was from Guy 2

Always loved this story.

Re: Hand Drawn QR Codes (2025)

#25
post #17

I saw similar engraved and then inked onto wooden boards at a restaurant, sadly, despite the error handling, 3 out of 4 I tried were not scannable, the 1 I did manage to scan to me to a reviews site for the restaurant (where a lot of reviews said they struggled to make the QR work - likely not the feedback the restaurant wanted)! I guess it kept me entertained whilst waiting for the bill.

There was a tweet a while back where I guy was riding a train in China and took a photo of the QR code for his seat. He mentioned that you can use the QR code to order food and drinks delivered directly to you. About 5 minutes later there was another tweet from him where: - someone saw the original tweet (Guy 2) - scanned the QR code - ordered the OP a drink - added a note to the order saying it was from Guy 2 Always…

A cautionary tale if your QR Code® is a ticket for the big show, or opens up your HIPAA portal somewhere

QR Code® is [sic] registered trademark of DENSO WAVE INCORPORATED.

Re: Hand Drawn QR Codes (2025)

#29
Anyone else scan their random junk that has QR codes to see where it goes? I've found a fair number of stuff has codes that do nothing. Bought an extra garage door opener remote, qr code on it does nothing. Got some SwitchBot gear, qr codes do absolutely nothing.

Re: Hand Drawn QR Codes (2025)

#30
post #29

Anyone else scan their random junk that has QR codes to see where it goes? I've found a fair number of stuff has codes that do nothing. Bought an extra garage door opener remote, qr code on it does nothing. Got some SwitchBot gear, qr codes do absolutely nothing.

QR codes, like other barcodes, store information. They never "do" anything.

Or are you saying the ones you found failed to checksum?

Post reply on HN