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My random knot in the Web

Articles about miscellaneous

  1. Laptop repair

    In November my four-year old laptop started acting up. First it shut itself down a couple of times when doing heavy calculations. Later the screen started showing artefacts in text mode and would hang the X server. I bought this machine from BTO because they offered quite a lot of ...

  2. Making my first EPUB

    Now that I got an EPUB reader, I started looking for a way to make EPUB documents.

    In principle, an EPUB file is a zipfile with a certain layout, as can be seen on the wikipedia page linked above.

    The actual contents are just XHTML, while the metadata files are ...

  3. Filtering a sound recording

    Recently I was listening to an MP3 file of a talk about no-till gardening when I noticed that there was a noticable buzz in the sound. I figured I would try my hand at sound filtering with Python as a learning experience.

    The Python standard library doesn’t have a ...

  4. Headphone repair

    date: 2013-01-04
    modified: 2016-12-11 00:00:00+01:00
    category: miscellaneous
    tags: diy

    For listening to music and watching movies on a PC, I prefer headphones. Years ago, I bought a Sennheiser HD 280 PRO, which I like very much. It sounds good and really attenuates external noise well (32 dB).

    Sadly though, the earpieces were disintegrating after years of service. As soon ...

  5. Evaluating REACH

    One of my responsibilities at work is to act as local expert with regard to chemical substances. One of the tasks is making sure we comply with REACH (“Registration, Evaluation, Authorisation and restriction of CHemical substances”).

    The REACH directive itself is huge, numbering 515 pages in the Dutch version. In ...

  6. Switch to pelican website generator

    If this website looks different, it is probably because I switched to the pelican website generator to create it.

    When I started my website, I edited the html files by hand in emacs. I kept that up for a long time, even after blogging software became available.

    Relatively recently, I ...

  7. A new STL convertor added

    In addition to stl2pov, I’ve now written a program that writes a shaded projection of the STL file (along the z-axis) as a PostScript file. It supports arbitrary rotations of the STL file around x-, y- or z-axis and automatically centers the object in the view, so you can ...

  8. stl2pov rewrite

    Python logo

    On 2011-04-04 I re-wrote my parser for STL files in Python. The original C parser was 411 lines (excluding comments and blank lines). The new parser in Python is 134 lines. This is also without comments. It took me about two hours to write from scratch. But that includes debugging ...


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