Personal Projects on Christian Kündig

Extracting Credit Information from Delisted Mobile Games

Mon, 09 Feb 2026 00:00:00 +0100

I discovered my MobyGames profile was missing credits from games I worked on. As the games are delisted and can’t be launched anymore, I reverse engineered the asset formats.

Custom AirPrint Icons with CUPS

Sun, 25 Jan 2026 20:00:00 +0100

My 20-year-old Samsung printer deserved better than a generic icon. Here’s how I dug through CUPS source code to figure out why printer icons don’t work and the simple Docker volume mount that fixed it.

My Custom TRMNL Setup For Our Home

Sat, 10 Jan 2026 00:00:00 +0100

Setting up a TRMNL display at home and building three custom plugins for local weather, the SBB station board, and a simplified family calendar.

Porting ScummVM to Webassembly, Part 4c - File Access

Mon, 04 Aug 2025 12:25:46 +0100

Revisiting how files are loaded over the network and finally adding support for cloud storage (Dropbox, Google Drive etc)

Porting ScummVM to Webassembly, Part 4b - Sound Improvements

Sun, 03 Aug 2025 12:25:46 +0100

Diving deep into the different audio options ScummVM provides and making sure they work in the browser.

Porting ScummVM to Webassembly, Part 4a - Maintenance

Sat, 02 Aug 2025 02:25:46 +0100

Cleaning up some loose ends to get ready for future improvements

How to avoid dynamically inserted podcast ads (via Youtube)

Mon, 21 Jul 2025 22:57:55 +0100

Dynamic ad insertion in podcasts is annoying. Here’s how I use Podsync to get ad-free podcast feeds from YouTube instead.

RetroWave OPL3 Express via Web Serial API

Thu, 10 Apr 2025 12:25:46 +0100

Authentic sounds from vintage sound chips - using the Yamaha OPL chip (AdLib, Soundblaster etc) in the Chromium.

Our Wedding Website, 5 Years Later

Sat, 09 Nov 2024 11:36:51 +0100

Reflecting on the custom wedding website I built in 2019, and how it evolved over the years.

Fixing Play Suisse in yt-dlp

Fri, 26 Jan 2024 22:42:54 +0000

yt-dlp support for Play Suisse has been broken since the platform enforced a user login to access any video streams in August 2023. Let’s fix that.

Porting ScummVM to Webassembly, Part 3

Fri, 05 Jan 2024 00:00:24 +0100

I finally found some time over the holidays to wrap up some improvements I was working on for ScummVM last year.

HDHomerun Server Emulation in Tvheadend

Sun, 26 Nov 2023 23:15:29 +0100

Time to retire tvhProxy by adding HDHomerun emulation to Tvheadend.

Github Shortcodes for the Hugo Static Page Generator

Thu, 02 Nov 2023 00:00:35 +0100

I link a lot to various GitHub items, so I built some Hugo shortcodes for it.

Reverse Engineering the 1995 FMV Game Silent Steel

Tue, 14 Mar 2023 11:41:01 +0100

Silent Steel is a submarine-themed FMV game released in 1995. This is the summary of it’s file formats, including a prototype re-implementation.

How to Add the Amphiro Hand Shower to Home Assistant

Sat, 14 Jan 2023 11:45:13 +0100

Looking into how to reverse engineer a funky christmas present and building out a new Home Assistant integration for it.

Forwarding Bluetooth with the April Brother BLE Gateway

Fri, 09 Dec 2022 11:46:04 +0100

We recently moved and I decided to buy a BLE->IP gateway off AliExpress to increase coverage in the bigger place. Turns out this needed some hacking to get it to work with Home Assistant.

Porting ScummVM to Webassembly, Part 2

Mon, 21 Mar 2022 11:39:21 +0100

Since merging the initial Webassembly port of ScummVM, I have added a few critical improvements

HP iLO Integration for Home Assistant

Tue, 08 Feb 2022 11:42:13 +0100

I have been using a HP Microserver for a few years as my home lab and quite enjoy it. Unfortunately Home Assistant’s existing HP Integrated Lights-Out (ILO) integration is very limited and does not have any configuration integration. I have started working on an updated version of this integration. For the initial release, I focused on three things:

Auto-Discovery with config flow so no configuration.yaml editing will be required.
Support for as many sensor types automatically out of the box.
Updating python-hpilo.

Sensirion SCD4x CO₂ Home Assistant Integration

Wed, 02 Feb 2022 11:48:32 +0100

I recently added support support for the Sensirion SCD4x CO₂ Gadget to the Passive BLE Monitor integration for Home Assistant.

Porting ScummVM to Webassembly

Fri, 20 Aug 2021 11:38:45 +0100

Making old adventure (and other) games available on the web.

Does Steam Remote Play support NvFBC on Linux?

Fri, 11 Dec 2020 11:52:50 +0100

Trying to get Steam Remote Play working from my Linux home lab, I noticed that while Steam offers capturing the frame data with NvFBC, the setting doesn’t seem have any impact. Why is that?

Why WebVTT subtitles in Plex don't work

Sun, 20 Sep 2020 22:41:33 +0200

For some reason video files downloaded from the web won’t play in Plex if they have subtitles.

tvhProxy: Streaming TVHeadend into Plex DVR

Thu, 20 Feb 2020 11:38:19 +0100

Plex launched it’s DVR feature in 2016. Unfortunately, it only supports either DVR tuners connected to the server directly or HDHomeRun devices. tvhProxy fixes that.

Extracting EPG data from the TV7 IPTV service

Thu, 06 Feb 2020 11:37:54 +0100

Init7, my FTTH provider has a great IPTV offering called TV7 Unfortunately there’s no way to fetch the EPG data.

Simulating barcode scanning on the web

Wed, 18 Dec 2019 11:37:11 +0100

The yearly hackathon at work is always a great time to pursue new ideas or play around in fun ways with existing technology. My entry in 2019 was a humorous take on using simulations when developing computer vision software. I long wondered to see if we could use modern game engines or other simulation technology to augment some of our real world testing at scale.

For the hackathon, I decided to apply my (as you will see quite limited) skills and implement a prototype of such a system.

Compiling Zork from Scratch

Wed, 17 Apr 2019 11:41:01 +0100

Today, the source code of many old Infocom Text Adventures has been uploaded to Github. Let’s see if we can compile Zork.

Product Management Night

Fri, 03 Nov 2017 11:42:13 +0100

On November 3rd I had the pleasure to present at the Product Management Night series of the Product Management Festival in Zurich.

This time it was held held at the beautiful NZZ foyer next to the opera house. My presentation focused on how we build deep-tech products a Scandit and how PMs connect technological capabilities and customer value.

I really enjoyed sharing my experiences and connecting with other product managers in my city.

BrowsePass fork with Dropbox support

Sat, 22 Nov 2014 11:36:12 +0100

Living and traveling overseas for more than a year, I want a way to access some of my more secure credentials in case of device loss.

BrowsePass is a static web application to read KDBX files as produced by KeePass. This allows me to securely access my passwords and logins from everywhere - all I need is a computer with a web browser.

As Google isn’t available in all the countries I’m traveling to (👋🇨🇳), I added support for Dropbox to it. The integration is completely client-side and uses Dropbox’ Oauth/Rest Client API.

Zürcher Journalistenpreis 2010

Fri, 28 May 2010 11:34:07 +0100

Im Mai 2010 gewannen Lukas Messmer und ich den Zürcher Journalistenpreis für unsere Reportage “Die Endstation” in der Zürcher Studierendenzeitung (ZS).

Master Thesis: Building an adapting Poker Agent

Sun, 14 Mar 2010 11:34:58 +0100

I wrote a learning poker bot for my master thesis. This was just at the cusp of the deep learning breakthroughs to come soon after.

Die Endstation

Wed, 25 Nov 2009 21:41:32 +0100

Manch lange Nacht endet in der Gräbli-Bar. Für viele ist die Bar eine Art Zuhause. Auch für uns, zumindest für 24 Stunden.

Gesellschaftsspiel: Dominion

Mon, 14 Sep 2009 21:49:46 +0100

Auch als adliger Grundherr fängt die Karriere hier ganz unten an. Bei Dominion beginnt jeder trotz Titel mit läppischen sieben Kupfermünzen und drei Schrebergärten, genannt «Anwesen». Das Spiel erinnert an Magic, welches uns aus den Jugendjahren noch bekannt sein dürfte.

Mit karibischen Beats durch den Schnee

Wed, 25 Mar 2009 21:50:11 +0100

Newcastle, das Pub rappelvoll mit alternden Skinheads, auf der Bühne hats kaum Platz für das Schlagzeug, geschweige denn die ganze Band. Alaska, das sind neun Jungs, grösstenteils Studenten, aus dem Zürcher Oberland und Umgebung. Gestartet 2004, sind sie von der Maturarbeit des Schlagzeugers zu einer der erfolgreichsten Schweizer Skaband gewachsen und haben diesen Januar ihr drittes Album getauft.

Wirtschaft: Seitensprünge

Mon, 24 Nov 2008 21:50:38 +0100

Wie immer an ungeraden Montagen nach einer Vollmondnacht war ich gestern wieder einmal in einer Vorlesung. Da der Stoff seit Semesterbeginn leider weder einfacher noch interessanter geworden ist, entwickelte sich Zeitunglesen erneut zur Hauptbeschäftigung.

Wirtschaft: Kondome

Mon, 27 Oct 2008 21:46:58 +0100

Leider habe ich im EM- und Sommerferien-Trubel mein in den letzten Semestern von exzessivem Wertverlust geplagtes Investmentgame-Spielkonto komplett aus den Augen verloren – wahrscheinlich wäre ich aber sowieso unterdessen ein Rettungsfall.

Erfolglose Abwartetaktik

Thu, 10 Apr 2008 21:51:12 +0100

Nach den Verlusten mit den UBS-Papieren sind auch die Dollars unseres Wirtschaftskolumnisten nichts mehr wert. Er setzt nun auf den Frühling

Danke, Marcel!

Fri, 22 Feb 2008 21:47:28 +0100

In der Hoffnung, mit der UBS ein Schnäppchen zu machen, verbrennt sich unser Wirtschaftskolumnist wiedermal die Finger. Im Börsenspiel belegt er nun Rang 2262.

Profitieren vom Leid der Bauarbeiter

Fri, 07 Dec 2007 21:39:19 +0100

Abrupter Kurswechsel: Unser Autor spekuliert ab sofort auf Verluste statt auf Gewinne. Das Opfer: Die Bauindustrie. Doch er hat die Rechnung ohne den Dollar gemacht.

Investment Banking im Selbstversuch

Fri, 02 Nov 2007 22:06:30 +0100

Der Tages-Anzeiger zahlt dem Sieger ihres Investment-Wettbewerbs 50’000 Franken. Für die «ZS» berichtet ein Wirtschaftsinformatik-Student regelmässig über seine Performance.

MeD's Movie Manager for OS X

Tue, 24 Jul 2007 00:00:00 +0000

My first open source contribution: porting a DVD collection manager to Mac OS X