Love Locks at Pont des Arts

Cura mag OpenSCAD nicht mehr

Zumindest vorübergehend. Sobald man versucht, eine aus OpenSCAD exportierte stl-Datei in Cura zu importieren, erscheint die Fehlermeldung "Ungültige Datei".

Der Grund dafür ist, dass Cura auf manchen Plattformen momentan Probleme hat, stl-Dateien im ASCII-Format zu lesen. Und OpenSCAD exportiert nur in ASCII-Format.

Als Workaround hilft ein Universal-Taschenmesser für stl-Dateien namens admesh. Neben etlichen anderen Transformationsmöglichkeiten konvertiert es eine ASCII-stl-Datei ins Binärformat:

admesh -b example-bin.stl example-ascii.stl

Diese lässt sich dann in Cura problemlos öffnen.

admesh ist im Fedora Repository verfügbar und kann (auf Wunsch inklusive einer GUI) einfach per dnf installiert werden:

sudo dnf install admesh admeshgui
An Arduino TV Simulator

SimTV: Arduino Uno and RGB shield A simple method to keep burglars away from your home is a TV simulator. It's basically a device with some bright RGB LEDs showing color patterns that resemble those of a telly turned on. They are sold at many electronic retailers. However, some customer reviews say that the color patterns do not look very realistic, with some distinctive flashes and colors that are usually not to be seen on a regular movie. Besides that, the color patterns often repeat after about half an hour.

Actually, distinctive color patterns that repeat after a short time, are a major disadvantage. Experienced burglars might recognize the color patterns and figure out it's a TV simulator. This would rather be an invitation than a deterrent.

So, let's build a better TV simulator ourselves. It's also more fun than buying something ready.

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Observatorio del Teide

In the heart of Tenerife, and 2400 meters above the sea, is the Observatorio del Teide. While its sister observatory on the island of La Palma is mainly used for observing the night sky, this observatory is mainly used for observation of the sun.

There are guided tours every week. We joined one of these tours, and had the chance to see the observatory, the inside of one of the buildings, and we also had a look at the sun with a special telescope.

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Hiking around the Chinyero

Chinyero is the name of a volcano in the National Park of Tenerife. Its last eruption was in November 1909, which was also the last eruption of a volcano on Tenerife.

The starting point is a tiny parking spot at the TF-38 that leads from the town Chío to the Teide national park. From there, we just follow the Circular Chinyero route, which is also marked with white and yellow posts. Our hike trip starts in a pine forest, then goes across a plain of volcanic rock, and then returns through a mix of pine forests and volcanic land.

Usually this place is located above the clouds. This time the clouds were rather high, and covered the landscape in a thick fog. It was very spectacular. At the plain of volcanic rock, it felt like we were walking on a foreign planet.

The tour is about 6.5 km long and easy to walk.

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Back again...

After a GDPR hiatus, the shredzone is back!

I used the time for a total redesign and a cleanup. The design is now responsive, so you can enjoy the articles on the big screen as well as on your smartphone. I have removed all the unnecessary stuff that were modern in blogs 10 years ago, but actually just cluttered the screen (like the calendar and the tag cloud).

There are a few bugs left and some features missing. I will take care of them in the next couple of weeks.

Anyhow, I hope you like the new design!

By the way: The shredzone turns 20 this year. Congratulations! 🎂

Wednesday, July 11, 2018