4 ms·I built a QR code with my bare hands to see how it works [video]9 points by ColinWright 2y agouljana 2y ago[dead]gus_massa 2y agoFor the impatient, the QR explanation starts at https://www.youtube.com/watch?v=w5ebcowAJD8&t=634s https://www.youtube.com/watch?v=w5ebcowAJD8&t=634s