HackerHotel 2019 Badge
SHA2017-derived Badge.Team badge
A HackerHotel badge made mostly from leftover SHA2017 parts, adding PSRAM, IR, stereo audio, Grove I2C, and SAO expansion.
Tag dossier
Grove
Badge records tagged with Grove, across Germany, Netherlands.
39C3 Critical Decentralization Cluster Badge
Open-hardware ESP32-S3 / TROPIC01 assembly badge and devboard
The Critical Decentralization Cluster's CDC Badge was presented as an electronic conference badge and development board at the completed 39th Chaos Communication Congress. The source-backed open-hardware platform combines an ESP32-S3, TROPIC01 secure element, front-lit e-paper display, twelve-button keypad, LiPo power path, and expansion ports, while public sources do not establish a conference-wide or admission-badge allocation.