Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR) ...

As you probably know, we love our clocks here at Hackaday. Odd display technologies are always interesting to see, as are unusual encoding techniques such as binary, ternary or higher-radix number ...

Drama school LAMDA has defended the use of QR codes to allow students and staff to report incidents of discrimination – arguing it is aiming to create a "safer environment". The QR codes were placed ...

For the longest time we’ve been using UPC bar codes to store strings of information in a compact space on both product labels and people in dystopian sci-fi movies. But as our needs grew and became ...

This article describes how QR codes attached to plaster casts provided patients with direct access to a website with specific information about caring for their cast and their recovery. This ...