Chaos Computer Club - Die Heilbronner Chaos Party 2025 (low quality webm)

Closing (dhcp25)

Sun, 02 Nov 2025 15:00:00 +0100

sudo systemctl stop dhcpd@hhn.service Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/3JZZDG/

Tappybara: Niemand hat die Absicht, Bargeld zu digitalisieren! (dhcp25)

Sat, 01 Nov 2025 22:00:00 +0100

At our Saarländisches Chaos-Event Mega-Knowledgecamp, we created an Innovative Digital Platform™ to have digital payments at the bar, without involving American payment acquirers and networks. This talk will present the many NFC crimes we committed to enable this. Let's admit it, dealing with cash at a bar, particularly notes with wet hands, is a bit of a faff. In September we held the first edition of the Saarland's first chaos event, Mega-Knowledgecamp. Obviously, we needed a bar, but we didn't want to be dealing with cash at the bar; neither did we want to be using the primarily American payment networks and acquirers for payments. As a solution to this dilemma, we decided to create our own payment system for the bar. Attendees could pre-book bar credit and pay via bank transfer, or hand over cash at the help desk. Payment could then be made at the bar using the ticket barcode, or using the digital wallet feature of Google phones over NFC - just like a bank card! This talk will cover how we built this system, how the NFC protocols of Google and Apple Wallet work, the insane level of NDAs required to implement this, and how you can use this yourself. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/KUTQB3/

Writing your own Go linter (dhcp25)

Sun, 02 Nov 2025 13:45:00 +0100

How does a (Go) linter work? We'll find out and write our own! A linter is an automated way of performing a code review. It automatically checks your code way faster than any human could do, and with way less environmental impact and more deterministically than an AI would use. Sure, it does not replace code review, but it allows the reviewer to focus on other things, that you don't have to mechanically check every time. If you are not using a linter in your CI pipeline, then you're wasting valuable engineering time. This talk will first dive into the details on how compiler parse the language and how the abstract syntax tree works. Then we'll take a look at Go owns analysis package and how we can use it to write our own linter, including a small example that you can use to get started writing linters. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/QDX9T3/

The S-Bahn Mitteldeutschland and It's Consequences (dhcp25)

Sat, 01 Nov 2025 17:15:00 +0100

The many consequences of running your regional rail network like an S-Bahn A transgender catgirl who knows too many things about the MDSB network infodumps to a (not) captive audience about the many issues said network has caused for the transit of the region around Leipzig and Halle Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/HCTRKV/

Opening (dhcp25)

Fri, 31 Oct 2025 18:00:00 +0100

sudo systemctl start dhcpd@hhn.service Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/K97WMF/

Creating a Gridfinity Chocolate Advent Calendar (dhcp25)

Sat, 01 Nov 2025 21:15:00 +0100

Normal Advent calendars are boring: so let’s make our own! We’ll combine all our favorite technologies: Gridfinity (for the grid system), 3D printing (for the grid), vacuum molding (for the chocolate), laser cutting (for the frame), and automated paper cutting to create advent calendars that are both beautiful and functional. Along the way, we’ll cover practical food safety considerations and show how these techniques come together to produce something tasty, nerdy, and gift-worthy. Join me in the creation of an advent calendar for the hackers and makers in your life. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/8MZRMA/

Segeln für Nerds: Aero- und Hydrodynamik am Schiff (dhcp25)

Fri, 31 Oct 2025 21:00:00 +0100

Wir verschaffen uns einen Überblick über die physikalischen Effekte in Aero- und Hydrodynamik, die dafür sorgen, dass Segelschiffe schwimmen, vorwärts fahren und nicht umkippen. Danach wagen wir noch einen Blick darauf, was zusätzlich im Wasser passiert, wenn große Schiffe in engen Kanälen, Hafenbecken und rückwärts unter Motor manövrieren.
grober Inhaltsplan

statischer und dynamischer Auftrieb, Verdrängung und Lateralplan

Kräfte- und Momentengleichgewichte

Segel- und Lateraldruckpunkte, Luv- und Leegierigkeit

Aufrichtende Momente, Stabilitätskurven, Kenterwinkel

Tragflächenströmungen, Reynoldszahl und Wirbel, Kurse zum Wind

Bugwellen und Wulstbug, Rumpfgeschwindigkeiten

Bank- und Squat-Effekte, Bernoulli-Theorem

Radeffekt bei Rückwärtsfahrt unter Motor

Zusätzliche Leinenkräfte im Hafen, Anlegen und Ablegen Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/B7LJ7G/

Speed Puzzlen – Die Ordnung im Chaos (dhcp25)

Fri, 31 Oct 2025 19:45:00 +0100

Eine kurze Einführung in die Kunst des Speed Puzzlen und die Community. Auch Puzzlen kann spannend sein! Ich erzähle euch etwas über das Konzept des Speed Puzzlen, die möglichen Strategien und die Community dahinter. Ausserdem werde ich einige Puzzles mitbringen, falls danach gepuzzelt werden will. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/NAQPAZ/