Słomkowski's technical musings

Playing with software, hardware and touching the sky with a paraglider.

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Welcome to my website! I’m Michał Słomkowski, if you want to contact me, you will find the details at the bottom of the page. Recent articles published or updated:

Constant 3.3 V power supply on Baofeng UV-5R/UV-5X microphone connector mod

Constant 3.3 V power supply on Baofeng UV-5R/UV-5X microphone connector mod

Easy hack for Baofeng UV-5R/UV-5X, which replaces dual-PTT functionality with constant 3.3 V on 3.5 mm jack tip. Useful for microphones, which require additional power.

Eavesdropping USB communication for reverse-engineering using Wireshark and VirtualBox and writing user-space driver in Python

Eavesdropping USB communication for reverse-engineering using Wireshark and VirtualBox and writing user-space driver in Python

If you have an unusual USB device which comes with its own Windows application, chances are that Linux software does not exist. What if tell you that is fairly easy to examine USB communication with Wireshark and write simple driver in Python?

Cheap flight computer combining Kobo Mini and BlueFly Vario module

Cheap flight computer combining Kobo Mini and BlueFly Vario module

Using e-book reader Kobo Mini with BlueFly Vario is a really cheap alternative to of-the-shelf paragliding variometers. I have built one with custom 3D-printed case.

Octoglow VFD - Geiger counter and magic eye

Octoglow VFD - Geiger counter and magic eye

Most vintage-like board of Octoglow. The heart of the device is a Geiger counter accompanied with magic eye tube. There are many vintage components used.

Octoglow VFD - Fallout-inspired display

Octoglow VFD - Fallout-inspired display

This grand project mixes modern technologies with obsolete ones like vacuum tubes and germanium transistors. Basically, it is an informational display heavily inspired by Fallout games, which you can put on your desktop.

Octoglow VFD - Clock display board

Octoglow VFD - Clock display board

Second module of Octoglow, which contains numerical VFD to display wall time and 433 MHz weather sensor receiver.