💻 Electronics Technician & Developer with a focus on embedded systems, software development and electronics.

I enjoy building things from hardware and firmware to full software applications.

📻 Licensed radio amateur — callsign DL4PW.

Projects, ideas and everything that's currently on my mind — from tech and electronics to whatever else I feel like writing about.

• Computerfuchs — learning computer for children aged 5 to 15, offline and as a kiosk · try it
• Tempo6 — racing game with power wheelchairs and mobility scooters · try it
• Genstrio — parametric generators for 3D printing · try it
• LinuxKompass — find the Linux distribution that fits you · try it
• JobKompass — career orientation for young people · try it
• Innenkind — a guided inner child session, private by design · try it
• conways-game-of-life — Conway's Game of Life with patterns, time travel and symmetry drawing · try it
• percolation-theory-simulator — zombie apocalypse as a percolation phase transition · try it

• AXLink — IPv4 over AX.25 packet radio with KISS radios such as the Quansheng UV-K5
• AXLink-TNC — KISS TNC app for the F4HWN firmware on the UV-K1/UV-K5 V3, built for IP over AX.25
• uv-k1-k5v3-aprs-firmware — fork: APRS messenger firmware for the Quansheng UV-K1/UV-K5 V3 · web flasher
• EtherDigits — run your own numbers station, with a one-time pad tool
• YonderRC — RC cars, boats, planes and drones over LTE/Wi-Fi with FPV video and telemetry
• YonderGate — off-grid site gateway on a Raspberry Pi: LTE, Tailscale, sensors
• RadioKiosk — kitchen radio, picture frame and world receiver with an RTL-SDR
• LoRaITP — send a photo 30 km over LoRa, once a day, on a battery · web flasher
• StegoComm — proof-of-concept covert messaging channel with AES-256-GCM
• esp-drone — ESP32 drone with browser control and staged failsafe · web flasher

• DiceCore — reads real dice with a camera on a Raspberry Pi
• IRescue — brute-force a lost IR remote with an ESP32 · web flasher
• convertible-keyboard-pcb — full-size keyboard PCB with a snap-off numpad
• custom-touchgfx-STM32F746IG — custom TouchGFX board with an STM32F746IG
• STM32G071CBT6-ILI9341 — STM32G071 board for an ILI9341 display
• ATMEGA328PB-minimal — minimal ATmega328PB board
• ATTINY13A-fake-alarm-device — fake alarm light that runs for years on a coin cell
• STDC14-to-TC2030-IDC — STLINK-V3 to Tag-Connect adapter
• Neopixel-WS2812-STM32 — WS2812 LED strip on an STM32 with DMA
• myKiCadLibrary — my KiCad symbols and footprints
• stm32-workflow — step-by-step guide for reproducible STM32 projects
• esp32-workflow — step-by-step guide for reproducible ESP32 projects

• bench-tools — Windows tools for Aim-TTi and R&S power supplies and loads, battery cycling
• watchdog-tools — alarms when a log stops growing or a program hangs, running backups
• lead-battery-calculator — lead-acid VRLA battery test calculator · try it
• liion-cell-calculator — Li-ion cell test calculator · try it
• lantronix-network-tool — find Lantronix devices on the network

• bible-verse-widget — a daily Bible verse for KDE Plasma and Cinnamon
• linux-desktop-destroyer — the 90s Desktop Destroyer classic for Linux
• sane-linux-scanner-app — scan with any SANE scanner straight into Paperless-ngx
• minecraft-server-guide — Minecraft Bedrock and Java+Bedrock crossplay servers on Debian/Ubuntu, with updates, backups and a kids' profile (in German)

• snippets — short scripts and small examples

• LTE-TCP-FPV-RC-Car — FPV RC car driven over the internet with a Raspberry Pi
• TCPRC-server — Raspberry Pi receiver: controller input over TCP to PWM
• TCPRC-client — Windows transmitter: gamepad input over TCP

Languages & Development

C · C++ · C# · Python · TypeScript · Go

Embedded & Electronics

Embedded Systems · Electronics · PCB Design · Arduino · Amateur Radio

Tools & Technologies

Git · GitHub · Docker · Linux

• Embedded systems and electronics for medical and industrial applications
• Software development with C#, Python and C/C++
• Hardware and PCB projects
• Automation and IoT projects