Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The public firmware archive includes ToneChaser examples for musical modes while the project writeup documents audio games and badge sound output.
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.