SAINTCON 2019 Enigma Badge
STM32 and iCE40 Enigma-machine badge with linked-ring challenge
The SAINTCON 2019 Enigma Badge was a two-board electronic conference badge shaped as a segment of an Enigma rotor, combining a curved RGB LED matrix, lampboard LEDs, 26 buttons, plugboard wiring, minibadge-holder support, and badge-to-badge connectors for a cooperative ring challenge.