Was wir heute gelernt haben:

Embroidering a logo

Embroidery machine at metalab. https://metalab.at/wiki/Stickmaschine

Left Click hackspace in Ljubljana is getting a new Logo and some Metalab folks are visiting.

https://metalab.at/wiki/Metalab_goes_Left_Click Trying to do some embroidery of the new logo to bring as a gift.

Some alignmets of the multiple layers were wrong. Turns out, the frame is held in place with magnets which disturbs the sensors of the embroidery machine.

With a plastic frame without magnets alignments are perfect.

Input for the embroidery machine. - SVG works (only if it has clean paths.) - Autoconverted from vectorised pixel art takes a lot of effort to clean up, usually faster to recreate as clean paths.

WHY 2025 Camp in the Netherlands

https://why2025.org/

WHY Electronic Badge

https://wiki.why2025.org/Badge

Two ESP32 µControllers and many sensors. Most of it doesn’t yet fully work. Banana firmware ripes at the users.

Also does WiFi, LoRaWAN

Updates DO work which helps a lot!

You can (almost) play DOOM. (Game runs, but input doesn’t work properly.)

Reports of the badge being a fire hazard are highly exaggerated. https://www.krekr.nl/content/why2025-badge-fire-hazard-additional-issues/

3D Casee for the badge

There’s 3D printable designs as a nice case.

Video recordings of WHY 2025 talks

https://media.ccc.de/c/WHY2025

LoRa, LoRaWAN

LongRange wireless communications.

https://www.thethingsnetwork.org/docs/lorawan/what-is-lorawan/

https://lora-alliance.org

https://de.wikipedia.org/wiki/Long_Range_Wide_Area_Network

regalraum - Graz hackspace

https://realraum.at

Also known as Regalraum.

Knopparp, Sweden

Ca 70 km vom ersten IKEA entfernt

Knopparp, Sofa

Sadly, not really sold by IKEA anymore https://metalab.at/wiki/Knopparp

Manual: https://www.ikea.com/jp/ja/assembly_instructions/knopparp-kunopparupu-ren-gua-kesofa__AA-922009-1_pub.pdf

Note Taking with Logseq

https://logseq.com

Uses Markdown and plain files as storage backend.

Has a nice Flash-Cards feature for learning.

Documentation basically “exists”. https://docs.logseq.com/#/page/contents

Can sync via a paid service. https://blog.logseq.com/how-to-setup-and-use-logseq-sync/

Clients available for most systems. - Browser - Android - iOS - Linux - macOS - Windows

Anki

Flash Card system, with spaced repetition learning https://apps.ankiweb.net

Srirarcha Inverter

Keep your favourite hot sauce upside down in the fridge. https://www.printables.com/model/598391-sriracha-inverter

Showing the difference when printed in - PLA - PCTG/PET-G and the cleaned in the upper basket of a dishwasher.

Music Notation Encoding

Music Encoding Conference https://music-encoding.org/conference/2025/

Travel report from this event in London 2025.

Music Encoding Conference 2025 Book of Abstracts https://works.hcommons.org/records/20s0d-gq678

Things like: Braille Sheet Music, color coding

Music notation (XML-based music encoding) in a browser. https://mei-friend.mdw.ac.at

XML-based music encoding holds a lot more metadata than MIDI ever could (MEI format even more than MusicXML). MusicXML and MEI are both examples of XML-based music encoding formats, many other formats exist and have been developed for decades.

Important for researchers. You can build a composer’s corpus with this.

Petrucci Music Library

Sharing the world’s public domain music

https://imslp.org

Lots of royalty free sheet music available as PDFs.

Encyclopedia Metallum

Ginormous amounts of data and metadata about Metal bands. https://www.metal-archives.com

Musicbrainz

Lot’s of metadata about albums, especially CDs. https://musicbrainz.org

Man music players that can play CDs can import metadata from there. Courisouly enough the album metadata is NOT part of the RedBook Audio standard. So a CD doesn’t actually contain any info what music is on there.

MyNoise

https://mynoise.net

A noise generator. Based on real world soundscape recordings.

MUSOPEN

We provide recordings, sheet music, and textbooks to the public for free, without copyright restrictions. Put simply, our mission is to set music free.

https://musopen.org

Phyphox

Smartphone App to play around with hardware sensors on your smartphone.

Android: - F-Droid: https://f-droid.org/en/packages/de.rwth_aachen.phyphox/ - Play Store: https://play.google.com/store/apps/details?id=de.rwth_aachen.phyphox&hl=en

iOS: - iOS https://apps.apple.com/at/app/phyphox/id1127319693?l=en-GB

Tram WorldChampionship - Tram WM

Saturday, 2025-09-13, in Vienna

https://tramwm.wienerlinien.at

There will be an afterparty at Metalab https://metalab.at/wiki/TramWM_Afterparty

Contrast in Webpages

Changing Contrast in Videos

Can improve accessibility in video-playback. https://optivid.tech-experience.at

Strudel

Programming music https://strudel.cc

Tons of videos on common video platforms.

Kruder & Dorfmeister

https://de.wikipedia.org/wiki/Kruder_%26_Dorfmeister

Sofa Rockers https://www.youtube.com/watch?v=ti1AMfY5uh0&list=RDti1AMfY5uh0&start_radio=1

Retro Achievements

Achievements for retro-games https://retroachievements.org

Also integrated with Retroarch

RetroArch

RetroArch is a frontend for emulators, game engines and media players. https://www.retroarch.com

Emudeck

ALL the emulators, preconfigured and button mapped for Valve’s SteamDeck. https://www.emudeck.com

Syncthing

Syncthing is a continuous file synchronization program. It synchronizes files between two or more computers in real time, safely protected from prying eyes. Your data is your data alone and you deserve to choose where it is stored, whether it is shared with some third party, and how it’s transmitted over the internet.

Recently went 2.0 with many improvements in efficiency

Retropie

RetroPie allows you to turn your Raspberry Pi, ODroid C1/C2, or PC into a retro-gaming machine. It builds upon Raspbian, EmulationStation, RetroArch and many other projects to enable you to play your favourite Arcade, home-console, and classic PC games with the minimum set-up. For power users it also provides a large variety of configuration tools to customise the system as you want.

The Interne Archive Retro Games

Tons of ROMs ob abandoned games. https://archive.org/details/classicpcgames

Pornophoniqe

https://www.youtube.com/@pornophonique

Performing live with Gameboy and guitar.

Special recommendation: 8-Bit Lagerfeuer

https://www.youtube.com/watch?v=2z2C4I5M8Yo&list=OLAK5uy_kg8r0tq-88Vc8pfmblXUoguoiebYrR9YM

Gameboy Music Club

https://www.youtube.com/results?search_query=gameboy+music+club

Performing live with multiple Gameboy devices on stage.

WHY2025 Badge

only works in Chrome https://why-prog.heplaphon.com/

Firmware https://gitlab.com/why2025/team-badge/firmware

https://media.ccc.de/v/mch2022-205-badge-talk https://media.ccc.de/v/why2025-280-getting-started-reading-bosch-sensor-data-on-the-badge-with-micropython https://media.ccc.de/v/why2025-206-all-about-badgehub

Stonehenge soldering challenge

It’s a challenge for soldering by hand.

https://gitlab.ccc.ac/cpresser/stonehenge

There is an interactive BOM

https://ca.rstenpresser.de/stonehenge.html

Don’t even think about ordering the BOM and using some assembly service!

This is not recommended as your first soldering challenge.

It’s tricky to reprogram the µcontoller (STM32). See the project page.

Tetrapods

There was a Build-your-own-Tetrapod plushie workshop at WHY2025 (https://wlcx.cc/projects/plush-tetrapod/) and soon at Metalab: https://metalab.at/wiki/Tetrapod-Workshop

You can build your own!

Håck-Ma’s

There’s postcards and a fixed date. and a website: https://hack-mas.at/

Hacktours

Unrelted to previous stuff. Obscure excursions to interesting locations. Once a quarter.

https://c3w.at/hacktours/

Also on Mastodon: https://wien.rocks/@hacktours

Chaos Computer Club Wien

https://c3w.at

Käuzchen

Nicht nur wegen der Wiener Schmankerlküche und seiner Lage, nahe am Museumsquatier, dem Volkstheater und der Universität gilt das Käuzchen gerade unter Studenten als einer der Hotspots der Wiener Lokalszene. Auch das umfangreiche Getränkesortiment und das urige und immer wieder überraschende Ambiente des Käuzchen findet seit mehr als 30 Jahre viele Freunde.

https://www.kaeuzchen.at

Mz*Baltazar’s Labratory

Mz*Baltazar’s Lab aims at generating a culture of fearless making! An environment that fosters creativity, activism and provocative thinking! We try to build an accessible, inclusive, open, safer and radical space, from which to evolve as people and as community. Open Source Technology is at the root of our philosophy, it enables us to share and collaborate without restrictions. We need this space to experiment with things as gender, hardware or our selves.

https://www.mzbaltazarslaboratory.org

Gebärdenverse

Verein für Kunst, Kultur, Bewegung und Gebärdensprache

Die Wurzeln von Gebärdenverse liegen im Wiener Hackerspace Metalab, wo sich die Gründungsmitglieder Oliver Suchanek und Franz Steinbrecher im Rahmen des zwei-jährigen Projekts “MACH’S AUF!” kennengelernt haben. Dort entdeckten sie eine gemeinsame Begeisterung für Werkzeuge wie Lasercutter, 3D-Drucker, Plotten sowie für Kunst und Accessibility.

Es gab den Wunsch, die Aktivitäten und Projekte aus der Metalab-Zeit auf eine strukturierte und nachhaltige Basis zu stellen. Aus diesem Engagement heraus entstand der Verein für Kunst, Kultur, Bewegung und Gebärdensprache – Gebärdenverse, mit Sitz in Wien. Der Verein wirkt gemeinnützig im Bereich Taube Kultur, Österreichische Gebärdensprache (ÖGS), kultureller Teilhabe und inklusiver Projektgestaltung.

https://gebaerdenverse.at