Reading QR codes without a computer!

URL: https://qr.blinry.org/?utm_source=tldrnewsletter
Type: link
Domain: qr.blinry.org

Excerpt: Just with a pencil and paper

Notes:
Linked article covers something that’s always been a matter of some amusing fascination for me. Which is how QR codes work, and how there are apparently variations in the basic look which continue working with the same algorithms.