I’ve been pretty busy lately, and I spend much of my spare time on my computer on contributions to the OpenBikeSensor.

A few months ago I had a test drive on a recumbent bicycle and was instantly hooked. Suffice it to say that a few months later I am the proud owner of one myself. Being the cautious cyclist I am, my top priority especially on a recumbent is visibility. The bike is quite low, my […]

(Deutsch) Bauanleitung für einen Infrarot Smartmeter Lesekopf für SML-basierte Smartmeter.

The wife now also starts a blog. Time to play: This blog here is still set up the old-fashioned way, php and mysql running on the web server. But setting up a wordpress for her gives me a welcome excuse to play with docker. So there you go: For the simplified creation of vhosts for […]

I found asciinema and wanted to try it. So without further ado here is an asciinematized version of the readme of pyduofern:

I keep forgetting how to do this so I’m finally gonna write it down. Synology DSM does not allow you to define arbitrary firewall rules. I especially want to define more paranoid firewall rules attached to openvpn connections. Sadly the GUI does not know about selective firewall rules for these so I had to do […]

The Doctor Who intro features a vortex clock. Find it on youtube here (left of the two clips). I went through some pain to vectorize it in halfway decent quality in preparation of building a Doctor Who themed wall clock. In case anyone else wants an SVG version here is my amateur attempt. I know a lot […]

Ever since I saw the microtype manual, I wanted to have something similar. The amazing thing about it is that you can switch on and off different microtype options and observe the resulting PDF output, I now found the package ocg-p which allows to generate pdfs with dynamically switchable layers similar to the above. I built […]

German legislation makes it difficult to run an open WIFI hotspot: Not only will the police possibly search your house if somebody decides to commit criminal acts using your connection, you will also be liable via Störerhaftung for copyright-“crime” committed using your connection. Despite the difficulties I am a big fan of offering open WIFI, and there is […]