Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The recommended build includes a buzzer, and the RF-detector behavior can use audible alerts when signal detection warrants it.
Badge context
Public KiCad add-on project and PCB files for the front-side badge add-on.
Badge setup guide documenting shield-only and ESP32 modes, OLED routing, boost configuration, buzzer, potentiometer, RF detector, and safety warnings.
C firmware tree with CH32Fun-style configuration, OLED, sprite, I2C, and driver files.
Electronic Cats public repository for the 44CON 2025 badge, including KiCad hardware, add-on files, firmware, diagrams, and repository license metadata.
KiCad board, project, schematic, symbol, and footprint source for the main badge hardware.
Official 44CON product page metadata for the September 18-19, 2025 Novotel London West event.
RamboRogers RF Hunter project named by the 44CON badge README as the basis for the badge's RF-detector behavior.
Source trail
Official event metadata source for the 18-19 September 2025 44CON ticket and Novotel London West venue.
Primary repository for the 44CON 2025 badge hardware and firmware, created July 24, 2025 and pushed October 8, 2025, with GitHub reporting C as the main language and MIT as repository license metadata.
Primary assembly and behavior source for the shield-only OLED mini-game mode, ESP32 Wemos D1 option, buzzer, MT3608 boost converter, AD8317 RF detector, I2C jumpers, potentiometer, JP1 voltage warning, RF Hunter basis, and Electronic Cats design credit.
Primary source for the CH32Fun-style firmware files, OLED support, I2C helper, sprites, driver headers, and badge application code.
Primary source for the badge KiCad board, schematic, symbol, footprint, and project files, including Wemos D1, AD8317, OLED, and MT3608 footprint evidence.