Conference 39th Chaos Communications Congress

One

Greenhouse Gas Emission Data: Public, difficult to access, and not always correct (en)

Hanno Böck

Data about greenhouse gas emissions, both from countries and individual factories, is often publicly available. However, the data sources are often not as accessible and reliable as they should be. EU emission databases contain obvious flaws, and nobody wants to be responsible.

Ground

Azubi-Tag Einführung (de)

Jedes Jahr zwischen Weihnachten und Neujahr treffen sich tausende Hacker*innen zum Chaos Communication Congress in Hamburg. Der Azubi-Tag ist eine günstige Gelegenheit für Auszubildende, den Congress zu besuchen, den CCC kennenzulernen und viel über IT-Security, Technik und Gesellschaft zu lernen. Wir freuen uns, diesen Tag nun zum dritten Mal anbieten zu können.

Design for 3D-Printing (en)

rahix

3D-Printers have given us all the unprecedented ability to manufacture mechanical parts with a very low barrier to entry. The only thing between your idea and its physical manifestation is the process of designing the parts. However, this is actually a topic of incredible depth: Design engineering is a whole discipline to itself, built on top of tons and tons of heuristics to produce shapes that are functional, strong, and importantly: well-manufacturable In this talk, I will present the rules for designing well-printable parts and touch on other areas of design considerations so you can learn to create parts that work first try and can be reproduced by others on their 3d-printers easily.

Zero

Lightning Talks - Tag 3 (de)

Bonnie, keldo, Andi Bräu

Lightning Talks - Tag 3

Fuse

The Museum of Care: Open-Source Survival Kit Collection (en)

Nika Dubrovsky

The talk is about the ideas behind setting up the David Graeber Institute and the Museum of Care. The Survival Kit Collection brings together collectives developing open source "social technologies" —spirulina farms, self-replicating 3D printers, modular housing, low-cost water systems, and ... art and education. In 2019, together with David Graeber, we held the first workshop about the Museum of Care at CCC to reimagine the relation between freedom, technology and value. Over these 6 years, the Museum of Care and the David Graeber Institute have experimented with various projects: the survival collection, Visual Assembly, and creating an open space for horizontal knowledge production—something we hope to develop into an actual University.

Stonewall IO (Saal Y 06)

Inclusive Yoga Practice: (Body) Diversity by default [all creatures welcome] (de)

Jamie

Body diversity by default. This workshop is a shared exploration space aiming to perceive body, breath and emotion as a psychological safe space. We explore interoception, adaptive movement and sensing without judgement.

DIY Laptop Music Instruments [all creatures welcome] (en)

Tess

Write software programs in ChucK that take in laptop input (e.g. keyboard, trackpad, mic) and output sounds of your choosing! No experience required, but some familiarity with programming recommended. Required: macOS/windows/linux laptop and headphones.

Chill Floor

Flow-Vi (de)

Viv & Flo

Dj Set

SoS Stage H

Wie wir auf den höchsten Kirchturm der Welt stiegen, um der Kirche beim Klimaschutz auf das Dach zu steigen (de)

Samuel_77

SoS Lecture E

A Decentralized Social Layer for the Web - Meeting People on All Pages (en)

Wolfspelz

SoS Workshop D

Stop Neurodiverse Discrimination Now (en, de)

Lucifer

#TeamDatenschutz-Meetup (de, en)

luap42 (er/ihm, he/him)

SoS Saal 6

Numerical Weather Prediction (de, en)

Raziel, tecer

CDC Triangle

Welcome to CDC day 3 (en)

Diego Salazar

What went on and what is coming next.

Getting started with the Pocket Science Lab (en)

Alexander Bessman

In this self-paced workshop we will learn how to use the instruments of the Pocket Science Lab (PSLab) board, with the Python API and the Android app.

CDC Circle

Making own Z-Wave (or Zigbee) device from scratch and assemble a Z-Wave (or Zigbee/Matter) controller (en)

PoltoS

We will program a Z-Wave or a Zigbee device and add it into a Z-Way smart home controller installed on Linux or flashed into an ESP32.

Bits&Bäume Workshop Area

Promptbastelei und andere Überlebensstrategien (de)

Marlene Kulla, Ann Katzinski

Wie fühlt sich Coden an, wenn immer eine KI im Tab daneben sitzt? In dieser Session wollen wir mit euch eure Erfahrungen diskutieren. Wir bringen Fragen aus unseren Fallstudien mit, ihr eure Alltagspraxis als Entwickler:innen: Wo setzt ihr KI konkret ein, wo lasst ihr sie bewusst draußen, wie verändert sie euren Workflow, eure Zusammenarbeit im Team und euer Rollenverständnis als Dev?

Kidspace - Workshopraum

Einführung in Scratch (de, en)

Einführung in Scratch

Komonin

Männerkreis: Wie kann gute Männerarbeit gelingen? [nur Cis Männer] (de)

muckla

Treffen der Bahn-Chaosbubble (de, en)

darkfrone (he/him)

Hardware Hacking Area -- Front

Surface Mount Electronics Assembly for Terrified Beginners (Day 3) (en, de)

Mitch (he/him)

Surface Mount Electronics Assembly for Terrified Beginners

Hardware Hacking Area -- Front-middle

39C3 LED badge -- SMD for Beginners (Day 3) (en)

Mitch (he/him), the0 (he his him)

**39C3 LED badge -- SMD for Beginners** https://github.com/hackwinkel/39C3LEDbadge The 39C3 LED badge contains 42 LEDs that blink under control of of a pre-programmed 4 cent microcontroller. When the badge is alone, the LEDs will blink randomly. When it is among friends (when there are other badges nearby), it will display a chaser pattern. In this workshop you will learn how to solder Surface Mounted Devices using a normal soldering iron. Suitable for beginners. Under 16s only with responsible adult supervision.

Hardware Hacking Area -- Rear

Solder your very own IoT Pusheen Cat Lamp with WLED! (Day 3) (en)

Hoid (he/him), brandonpaiz

Solder your very own IoT Pusheen Cat Lamp with WLED

Free Knowledge Habitat

Search Engines for the Curious (en)

Slatian

English version below, this Event will be in English. Du hast gerade erfahren, dass einige Chaoswesen in ihrer Freizeit an ihren eigenen Suchmaschinen basteln (lies: Websuche mit eigenem Index) und bist jetzt neugierig? Dieses Treffen soll diejenigen, die bereits Erfahrung mit dem Bau von Suchmaschinen haben, mit denjenigen zusammenbringen, die mehr darüber wissen wollen. Geplantes format ist eine kurze Vorstellung gefolgt von einem "ask me anything". Wesen, die auch Fragen zu dem Thema beantworten können sind willkommen (Bitt vorher Slatian bescheid geben). Wenn Du bereits an einer Suchmaschine gebastelt hast, könnte dich das [Search Engine Creators Meetup](https://events.ccc.de/congress/2025/hub/en/event/detail/search-engine-creators-meetup) interessieren. Das Event im 39c3 Hub: https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious English: You've just learned that some chaos-creatures tinker with their own search engines in their free time (as in real web search with its own index) and want to know more? This meetup aims to bring together those who already have experience building search engines with those who want to know more about that. Planned format is an "ask me anything". Creatures who want to answer questions are welcome (please contact Slatian in advance). The Event on the 39c3 Hub: https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious

Fediverse shared table

Alternative Nutzungsweisen von Microblogging (de)

sozialwelten (er/ihn)

Kidspace - Elektrotisch

Elektrobausteine - Tag 3 (de, en)

Elektrobausteine/Electric circuits with building blocks

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Schedule