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:

Octoglow VFD - Orange Pi Zero board and software

Octoglow VFD - Orange Pi Zero board and software

Module which houses the brain of the Octoglow - the Orange Pi Zero single board computer. It also contains I²C DAC to drive analog gauges to show CPU usage in real time.

Paramotor helmet with headset

Paramotor helmet with headset

Skateboard helmet accompanied with Peltor earmuffs and communication equipment is a legitimate alternative to expensive off-the-shelf paramotor helmets which in fact are built on the same principle. I use military-grade differential dynamic microphone to achieve superior speech intelligibility.

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.