I’m Patrik Eriksson. I make films, and I build open-source tools for the things I need while making them. Two of those are below — both are free to use, fork and take apart.
CineMate
An open-source boilerplate for building your own digital cinema camera on a Raspberry Pi 4 or 5. It records CinemaDNG raw video from off-the-shelf parts — a Pi, an official HQ or GS camera module, an SSD — and leaves the camera body to you. Buttons, switches, rotary encoders, potentiometers and an OLED are mapped in a single settings file; a web GUI served from the camera’s own hotspot drives it from a phone, and a web API lets you build wireless controllers and tally lights. It runs on a fork of cinepi-raw, the raw recorder by Csaba Nagy.
HackThePiano
Learn to read notes on the fly: play the note you see, as fast as you can. This is a fork of Wojciech Małota-Wójcik’s trainer — the app and the music logic that makes it work are his. The fork adds an on-screen piano so you can practise without an instrument attached, C/F/G landmark markings to navigate the staff by, a free-practice mode, and a module framework for new exercises. It runs in a browser; a MIDI keyboard is optional.