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Welcome to my website! I’m Michał Słomkowski. I work full-time as a Java/Kotlin backend developer and Linux system administrator. Here, I usually write about my tinkering endeavors, electronics, hardware, software, amateur radio and mechanical hacks. I live in Poznań, Poland. If you want to contact me for any reason, you can find the details on the About page.
There are 38 articles on this website. The most recent articles have been published or updated:
The HF transceiver I couldn't finish
As a teenager, I attempted to build a 0–30 MHz transceiver from scratch, going through three design iterations. None were completed; design errors and the lack of more advanced RF measurement equipment overwhelmed me. Still, I include the description here as a monument to that fascination.
MikroTik: Configuring T-Mobile Polska Internet over Vectra DOCSIS cable network
Replace ISP-issued router with MikroTik router.
Getting into Meshtastic with Orange Pi Zero 3 and E22-900M30S LoRa module
Testing a Meshtastic node with an Orange Pi Zero 3 and an E22-900M30S (SX1262) LoRa module. I describe Armbian, SPI, GPIO configuration, and building an 868 MHz ground-plane antenna.
FFmpeg under Debian with NVIDIA NVDEC (CUVID) and NVENC support
A quick guide for FFmpeg with NVIDIA GPU support on Debian 13, including compilation and examples of hardware-accelerated video transcoding.
Isolated AC/DC power supply or testing station for 230 V devices
I describe the design and construction of an isolated AC/DC power supply and testing station built from a salvaged East German variac. It features variable AC output (0–330 V) and DC output (0–450 V) and integrates digital meters and safety features.
Server resetter from Waveshare Ethernet Relay module
A quick project connecting a Waveshare Modbus Ethernet relay module to a motherboard's reset pin to have an emergency remote reset button.