Hackaday Belgrade 2016 Badge
PIC badge with LED matrix, IR, and open firmware
A slim open-hardware conference badge designed around a red 8x16 LED matrix, PIC18LF25K50, IR send/receive, USB bootloader, tactile controls, and attendee-written demos.
Tag dossier
Bootloader
Badge records tagged with Bootloader, across Denmark, Serbia.
BornHack 2017 Badge
Happy Gecko OLED programming badge
BornHack's first deeply programmable badge used a Silicon Labs Happy Gecko MCU, OLED display, buttons, USB, and an example-heavy firmware repository.