Hacker Con Badges

Easterhegg 2024 · Germany · 2024

Easterhegg 2024 RCA Badge

Rabbit Chaos Adventure badge

A source-backed Easterhegg 2024 badge record for the Rabbit Chaos Adventure: the event wiki points to challenges on campus, laptop, and badge, while the public repository preserves RCA badge files, schematics, Gerbers, parts exports, media, and printable add-ons.

Easterhegg Germany Rabbit Chaos Adventure CTF Gerbers Schematics NE556 Badge Add-ons Soldering Regensburg CCC
EventEasterhegg 2024
SeriesEasterhegg
LocationOTH Regensburg
CountryGermany

People

Authors & Credits

RCA closing-talk thanks

Flo

Named in the closing talk thanks slide.

Source

RCA closing-talk thanks

Freddy

Named in the closing talk thanks slide.

Source

RCA closing-talk thanks

Sandra

Named in the closing talk thanks slide.

Source

RCA closing-talk thanks

faheus

Named in the closing talk thanks slide.

Source

RCA repository owner and closing-talk speaker

x70b1

GitHub repository owner for the EH21 badge files and listed speaker on the Rabbit Chaos Adventure closing talk.

Source

Rabbit Chaos Adventure closing-talk speaker

Timo

The RCA closing talk title lists x70b1 and Timo as speakers.

Source

Rabbit Chaos Adventure creative lead

Tobias Dorn

Rabbit Radio identifies Tobias Dorn as the creative head behind the RCA and quotes him explaining the badge kit and challenge design.

Source

Why It Mattered

It adds a modern CCC-family Easterhegg badge to the compendium and captures the way a regional event blended physical camp exploration, badge hacking, soldering, CTF-like play, and challenge-unlocked hardware parts.

Hardware

The repository preserves separate schematic PDFs and Gerber ZIPs for the badge, head, hood, arm, and back boards; LCSC parts exports include LEDs, AAA battery holder, NE556 timer IC, capacitors, and other SMD parts; and the 3D-print folder documents a back cover, switch cap, holder, and optional extra LED illumination path.

Software & Apps

The Rabbit Chaos Adventure used badge-linked challenges, CTFd-style challenge flow, campus QR/sticker/geo tasks, laptop tasks, and badge tasks around artwork secrets, circuit questions, resistance, LED color, NE556 outputs, and timing. The current dossier still does not claim a full firmware architecture or app store.

Lore

Feedback, the closing talk, and Rabbit Radio reporting show both enthusiasm and friction: the badge was a solderable kit that could level up through solved challenges, but some attendees did not discover the RCA/CTF or expected hardware rewards early enough.

Lifecycle

Add-ons & Upgrades

CTF/scavenger-hunt surface historical

Rabbit Chaos Adventure badge challenges

The event wiki describes Rabbit Chaos Adventure challenges on campus, laptop, and the badge, making the badge part of the game surface.

Compatibility: Easterhegg 2024 RCA Badge

Source
game-to-hardware lifecycle historical

Challenge-unlocked parts progression

Rabbit Radio reports that challenge progress unlocked more parts for the PCB, turning puzzle progress into a physical badge build-up mechanic.

Compatibility: Easterhegg 2024 RCA Badge

Source
hardware add-on historical

RCA badge add-ons

Participant reporting says CTF success yielded cool add-ons for the Easterhegg badge and that the badge could later be soldered in the hackerspace.

Compatibility: Easterhegg 2024 RCA Badge

Source
mechanical/light add-on archived source

3D-printable back cover and illumination

The back-cover README documents printable cover and switch-cap files, optional additional LEDs, switched-power pickup pins, LED mounting, masking, and snap-on assembly.

Compatibility: Easterhegg 2024 RCA Badge

Source
multi-board hardware package archived source

Badge/head/hood/arm/back PCB set

The repository exposes separate schematic PDFs and Gerber ZIPs for the badge, head, hood, arm, and back boards, making the RCA artifact a multi-board kit rather than a single PCB record.

Compatibility: Easterhegg 2024 RCA Badge

Source
workshop/lifecycle historical

Hardware-hacking area soldering

Attendee writeups place badge soldering and SMD practice inside the event hardware-hacking area, with help and conversation around PCBs and badges.

Compatibility: Easterhegg 2024 RCA Badge

Source

Operational history

Issues & Camp Impact

missing rights-cleared image note

No Easterhegg 2024 RCA Badge image is published because the current public source trail has not been paired with a reusable original badge or artifact photo or official upstream raster render with source URL, license or permission basis, attribution, and processing notes.

The Germany record remains source-backed and image-free rather than copying source-page media, documentation screenshots, event photos, social media, placeholders, or generated approximations.

Confidence
local project policy
Status
needs licensed original replacement
Timeframe
current catalogue build
Source note
badge.gallery image policy and Easterhegg 2024 RCA source trail.
parts/reward expectation friction note

The closing talk includes attendee reaction about buying a ticket yet not receiving parts, while Rabbit Radio describes challenge progress unlocking more parts for the badge.

The RCA build-up mechanic was part of the fun, but also created expectations around badge parts and prize/reward availability.

Confidence
closing talk reaction and field report
Status
historical
Timeframe
during event
Source note
Rabbit Chaos Adventure closing talk and Rabbit Radio report.
source-depth caveat note

The repository review confirms schematics, Gerbers, LCSC parts exports, media, 3D-print files, NE556-related challenge material, and multi-board RCA structure, but this pass still does not claim a complete firmware architecture or full electrical BOM extraction.

The dossier is now specific about the public artifact package while still avoiding unsupported firmware and chip-level claims beyond what the repository and reports expose.

Confidence
repository, talk, wiki, field report, and participant reports
Status
repository reviewed; firmware still not asserted
Timeframe
expanded repository pass
Source note
x70b1/eh21badge repository, Rabbit Chaos Adventure closing talk, Rabbit Radio, Easterhegg wiki, and participant reports.

Resources

EH21 Gerber packages hardware manufacturing source · Repository folder with Gerber ZIPs for badge, head, hood, arm, and back boards. EH21 LCSC parts exports BOM/parts source · Repository folder with LCSC exports listing SMD LEDs, battery holder, NE556 timer IC, capacitors, and other ordered parts. EH21 back-cover 3D prints mechanical add-on source · Repository folder documenting back-cover STL, switch-cap STL, FreeCAD source, and optional extra LED illumination. EH21 badge repository source · Public repository described as files for the Easterhegg 2024 RCA Badge. EH21 hardware-hacking area event wiki · Event hardware-hacking area page for soldering and badge work context. EH21 media and booklet challenge/media source · Repository folder with RCA talk PDF, booklet PDF, audio media, and PCB imagery. EH21 schematic PDFs schematic source · Repository folder with schematic PDFs for the badge, head, hood, arm, and back boards. Easterhegg 2024 feedback event feedback · Public feedback page with RCA/CTF communication caveats and badge praise. Easterhegg 2024 wiki event wiki · Official event wiki naming OTH Regensburg and Rabbit Chaos Adventure challenges on campus, laptop, and badge. Easterhegg 21 attendee report participant report · Attendee writeup linking the badge repository and describing SMD soldering in the hardware-hacking area. Rabbit Chaos Adventure closing talk · Closing talk about the Rabbit Chaos Adventure, badge, and puzzle resolution. Rabbit Radio Easterhegg report field report · Campus radio report naming Tobias Dorn as the creative head behind RCA and describing the badge kit, challenge flow, and part-unlock mechanic. Un-Hack-Bar Easterhegg report participant report · Participant report documenting CTF placement, badge add-ons, and later soldering.

Sources

Easterhegg 2024 Wiki: Easterhegg 2024 Retrieved 2026-05-15 · Primary event source for Regensburg, OTH venue, and Rabbit Chaos Adventure badge-linked challenges. Easterhegg 2024 Wiki: hardware-hacking-area Retrieved 2026-05-15 · Primary source for hardware-hacking area context. Easterhegg 2024 Wiki: Feedback Retrieved 2026-05-15 · Source for field feedback, communication issues, and attendee badge praise. GitHub: eh21badge Retrieved 2026-05-15 · Public source repository for RCA badge files, challenge story, schematics, Gerbers, parts exports, media, and 3D-print files. GitHub: EH21 Gerbers Retrieved 2026-05-15 · Manufacturing source folder for separate badge, head, hood, arm, and back board Gerber ZIP packages. GitHub: EH21 Schematics Retrieved 2026-05-15 · Schematic source folder for separate badge, head, hood, arm, and back board PDFs. GitHub: EH21 Parts Retrieved 2026-05-15 · Parts-export source for ordered badge components, including LED, battery-holder, NE556, capacitor, and other SMD line items. GitHub: EH21 Media Retrieved 2026-05-15 · Media source folder for RCA talk PDF, booklet PDF, audio, PCB image, and story/challenge materials. GitHub: EH21 backCover Retrieved 2026-05-15 · Mechanical add-on source for the 3D-printable back cover, switch cap, optional LED rail, and assembly notes. Rabbit Radio: Easterhegg Retrieved 2026-05-15 · Field-report source for Tobias Dorn credit, badge-kit framing, challenge-unlocked parts, and social/physical scavenger-hunt behavior. Un-Hack-Bar: Die Easterhegg, der Chaos Computer Club und was das alles mit der UN-Hack-Bar zu tun hat Retrieved 2026-05-15 · Participant source for CTF result, badge add-ons, and soldering note. blog.dasrecht.net: Easterhegg 21 Retrieved 2026-05-15 · Attendee source for badge repository link and SMD soldering in the hardware-hacking area. media.ccc.de: Rabbit Chaos Adventure: Closing Retrieved 2026-05-15 · Talk source for RCA story, badge, and puzzle resolution.