Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The public sources identify an ST7789 240x320 TFT display and six LEDs as the badge's main visual surfaces.
Badge context
Repository README source for ESP32-compatible hardware, ST7789 240x320 display, six LED pins, capacitive wheel and center-button inputs, buzzer pin, Arduino IDE/TFT_eSPI workflow, and `tonechaser`, `working`, and `wheel_visualization` firmware examples.
Public poplicola repository preserving the THOTCON touch-wheel badge example archive, Eagle schematic and board files, and Arduino/ESP32 demo firmware directories.
Official contest source documenting Gold Badge-eligible contests and the badge contest instruction to read the program, solve the puzzles, and hack the badge.
Official THOTCON source for Chicago's Hacking Conference, the May 30-31, 2025 0xD dates, TOP_SECRET venue framing, and THOTCON Infinity NFP production context.
Hackaday.io source for Fourfold's 2,000-unit badge build, ESP32, ST7789 TFT, capacitive touch wheel, buzzer, six LEDs, LiPo battery, add-on header, firmware/game/challenge scope, production fixtures, packaging, and sub-$20 BOM target.
Source trail
README source for the cleaned-up demo-firmware boundary, hardware requirements, pin mapping, Arduino setup, firmware example roles, and Fourfold credit.
Repository source for public Eagle board/schematic files, C++/Arduino demo firmware directories, and absence of GitHub-detected license metadata in the current pass.
Project-owner source for Fourfold's badge design/production role, 2,000-unit quantity, ESP32/ST7789/touch-wheel hardware, firmware feature surface, add-on header, production/test fixtures, and repository handoff.
Official event source for THOTCON 0xD as Chicago's Hacking Conference on May 30-31, 2025, with TOP_SECRET venue framing and nonprofit production context.
Official contest source for the badge contest and Gold Badge eligibility framing.