TL;DR
Derek Woodroffe has created a unique badge that features a fully-functional scannable QR code, which is made up of 143 transistors. This badge serves a dual purpose: it functions as a promotional item for Extreme Kits and showcases a creative approach to integrating electronics in a visually interesting way. The QR code is not just an image but is constructed from MOSFET transistors that operate an 11-stage shift register to drive 24 colorful LEDs around the badge's edge.
Why This Was Curated
The article presents a unique project that combines hardware and software concepts, making it highly relevant for software developers interested in embedded systems. It includes practical details and schematics, enhancing its actionability, although it leans slightly more towards project documentation than a step-by-step tutorial.