DORS/CLUC 2024 · Croatia · 2024

DORS/CLUC 2024 Badge

E-paper IR social-quest badge

The first electronic DORS/CLUC conference badge, with a 2.66 inch monochrome e-paper display, badge-to-badge IR discovery, twelve special-badge unlocks, light-sensor web configuration, blue LED patterns, open KiCad and firmware files, and OSHWA certification.

DORS/CLUC Croatia E-paper STM32L431 IR Light Sensor Social Quest Open Hardware OSHWA KiCad

EventDORS/CLUC 2024

SeriesDORS/CLUC

LocationZagreb

CountryCroatia

Image Provenance

Asset: optimized WebP from transparent cutout
Status: licensed original photo
Source: badge.jpg
License: CC0-1.0 documentation asset; hardware project certified under CERN-OHL-P-2.0
Attribution: HYPERGLITCH / DC2024badge repository contributors
Notes: Original 420x578 repository photo downloaded from the public hyperglitch/DC2024badge GitLab repository, stripped of metadata, scaled to the site badge canvas, conservatively masked around the lit bird-shaped PCB, e-paper module, and stand, and preserved as a transparent source cutout before WebP delivery conversion. The repository README embeds badge.jpg and links OSHWA HR000116, where the project lists CERN-OHL-P-2.0 hardware, MIT software, and CC0-1.0 documentation licensing; this is a real badge photo, but the warm floor/background remains visible through physical openings and around the stand. The published badge.gallery delivery file is an optimized WebP generated from the rights-cleared local derivative/source with metadata stripped, WebP quality 82, and a maximum side cap of 1600 pixels when the source is larger; upstream source URL, license, and attribution remain unchanged.

People

Authors & Credits

badge designer and HYPERGLITCH writeup author

Igor Brkić

The 2024 writeup is published by HYPERGLITCH and written in first person as the badge designer.

Source

public badge documentation and source publisher

HYPERGLITCH

The public design writeup and linked source repository are published under the Hyperglitch identity.

Source

Why It Mattered

DORS/CLUC 2024 adds Croatia to the European badge map with a source-backed open hardware conference badge whose main mechanic was social: attendees had to meet other badges and special speaker/organizer badges to fill the counter and hidden image.

Hardware

The design writeup documents STM32L431, a raw Waveshare 2.66 inch monochrome e-paper display with driving circuitry on the PCB, two AA batteries, ambient light sensor, IR transmitter and receiver, touch sensor, blue LED matrix, voltage supervisor, and 32.768 kHz RTC crystal.

Software & Apps

Firmware was written in C with STM32CubeIDE, used Waveshare e-paper driver code, and implemented Manchester-encoded IR and light-sensor configuration protocols. A static web UI encoded configuration by flashing full-page colors for the badge's light sensor.

Lore

The designer explicitly framed it as the first electronic badge for DORS/CLUC. The hidden-image quest turned the badge into a social prompt, while the writeup also preserves practical firmware pain around phone-display differences and light-sensor decoding.

Lifecycle

Add-ons & Upgrades

badge-to-badge game historical

IR social quest and special-badge unlocks

Each badge periodically transmitted a unique IR code and listened for other badges; seeing twelve special speaker/organizer badges unlocked parts of a hidden image.

Compatibility: DORS/CLUC 2024 Badge

Source

configuration workflow historical

Light-sensor web configuration

A static web page encoded settings by blinking full-page colors that the badge decoded through its ambient light sensor.

Compatibility: DORS/CLUC 2024 Badge

Source

source release historical

OSHWA-certified open hardware release

The 2024 badge released KiCad, firmware, web configuration, production data, and a programming-jig model, with CERN-OHL-P-2.0 hardware and MIT firmware licensing.

Compatibility: DORS/CLUC 2024 Badge

Source

Operational history

Issues & Camp Impact

image provenance upgrade note

The DORS/CLUC 2024 visual uses an optimized WebP derived from a transparent cutout derived from the repository `badge.jpg` photo embedded in the open DC2024badge README.

The public badge page, image archive, and API point at a real badge photo with source URL, license basis, attribution, and cutout-processing notes preserved.

Confidence: project image provenance, GitLab repository, and OSHWA certification record
Status: licensed original replacement applied
Timeframe: current catalogue build
Source note: Project image provenance, hyperglitch/DC2024badge README, and OSHWA HR000116.

light-sensor compatibility caveat note

Light-based configuration worked well on some phones and less well on others because display characteristics affected signal detection.

The source documents the practical edge case and mitigation: slowing down the transmission speed helped on some devices.

Confidence: designer writeup
Status: historical
Timeframe: firmware development
Source note: DORS/CLUC 2024 Badge writeup.

Resources

DORS/CLUC 2024 badge repository source repo · Open GitLab repository for KiCad, firmware, web configuration, production files, and programming-jig model. DORS/CLUC 2024 badge talk slides talk slides · Slides linked from the designer writeup for the badge talk. DORS/CLUC 2024 badge writeup designer writeup · Hyperglitch writeup for the first electronic DORS/CLUC badge, including design, hardware, firmware, web configuration, and licensing notes. DORS/CLUC 2024 web configuration UI configuration tool · Static web UI that flashed screen colors so the badge could receive configuration through its ambient light sensor. DORS/CLUC badge manual official manual · Official badge manual linked from both DORS/CLUC badge writeups. OSHWA HR000116 certification open hardware certification · OSHWA certification record referenced by the 2024 badge writeup.

Sources

DORS/CLUC: DORS/CLUC badge manual Retrieved 2026-05-15 · Official manual linked from the designer writeup. GitLab / hyperglitch: dc2024badge Retrieved 2026-05-15 · Primary source repository for hardware, firmware, web configuration, and production files. HYPERGLITCH: DORS/CLUC 2024 Badge Retrieved 2026-05-15 · Primary designer writeup for the 2024 e-paper, IR, light-sensor configuration, STM32L431, firmware, open hardware, and OSHWA claims. OSHWA Certification Directory: HR000116 Retrieved 2026-05-15 · Open Source Hardware Association certification record for the 2024 badge.