Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
Friday Hacks #287 framed the badge as an electronic-badge production story for over 1,000 units, spanning artwork, electronics/code, assembly, and programming.
Badge context
Espressif Component Registry entry for the NUS Hackers hnr26_badge component used to control LEDs and buttons on the Hack&Roll 2026 badge via the built-in GPIO expander.
Repository README for the firmware tree, dice-lighting behavior, hnr26_badge and aw9523 dependencies, and generated documentation notes.
MIT-licensed NUS Hackers repository preserving ESP-IDF workshop firmware for the Hack&Roll 2026 hardware badge, component dependencies, documentation links, and badge acknowledgements.
ESP-IDF C entrypoint showing hnr26_badge initialization, button polling, virtual-pin updates, dice LED control, and 100 ms loop timing.
NUS Hackers talk page for making an electronic badge for over 1,000, covering ideation, artwork, electronics/code, assembly, and programming.
NUS Hackers recap describing Hack&Roll 2026, Singapore student-hackathon context, January cadence, and the first custom PCB badge participants personalized and hacked during the weekend.
Repository MIT license naming NUS Hackers as the 2026 copyright holder for the public firmware/workshop archive.
Source trail
Component registry source for the NUS Hackers MIT-licensed hnr26_badge package that controls LEDs and buttons on the Hack&Roll 2026 badge via the built-in GPIO expander.
Organizer talk source for the badge's Quack & Roll name, 1,000+ electronic-badge making-of framing, and named Terence/Yik Jin speaker context.
Organizer source for the 2026 event context, first custom PCB badge statement, participant personalization/hacking behavior, and hackathon scale.
Repository license source establishing the MIT basis for the public firmware/workshop code archive, not for copying event photos into the catalogue.
Primary repository documentation for the dice-lighting firmware behavior, hnr26_badge badge-specific I/O component, aw9523 GPIO-expander dependency, and documentation path.
Primary public source for the ESP-IDF workshop firmware archive, Hack&Roll 2026 hardware-badge scope, ESP32-C3-WROOM-02-N4 sponsor note, component dependencies, documentation links, and acknowledgements.