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 Today was the Swedish midsummer eve – and I used the free day for a bicycle ride. Hunting geo-caches also brought me in contact with nature. Pyrola rotundifolia A hazelnut forest Paris quadrifolia Paris quadrifolia is quite common in the forests around Uppsala. Paris quadrifolia Sometimes […] Continue reading Swedish midsummer flora  Today my employer, Uppsala University, will migrate our email system from an open-source and Unix based one to Exchange Server. At the same time we are all encouraged to migrate ourselves to using Exchange/Outlook for the sake of the benefits. Well, I will not, ever… Some working group in the administration has decided that […] Continue reading Brave New World  Transatlantic recently asked about a new IKEA LED lamp, the LEDARE with 1000 lm. It comes as a quite big globe (diameter 95 mm) with an E27 socket, an electrical power rating of 16.5 W and is supposed to be dimable! Transatlantic commented on the high quality of the warm-white light output and wondered […] Continue reading That’s bright! Dear fellow resident German citizens! Is it really and completely normal for you that the stamp vending machines of the German Post still return the change in worthless stamps only? a post counter hosted in a supermarket and tended by the personnel of the supermarket closes at 18:30, even though the supermarket itself is […] Continue reading Impressions from a trip to Germany This article is about German tv advertisements for sugar pills according to the teachings of Wilhelm Heinrich Schüßler. Since this is a German phenomenon and superstition I will not translate it to English.  Two weeks ago I wrote about my experience with special price offers for LED bulbs at Bauhaus. What I didn’t write was that I then just went to the other side of the street – well almost – and bought a 2.2 W E14 LED bulb at Jula. 2.2 W E14 LED […] Continue reading LED lamps are (not) forever  On National Geographic there is right now a science show called Brain Games. Even though a lot of the contents is not new, there was one optical illusion which really fascinated me: Which direction are the black and white balls moving? Look at the full image, look at the red circle, look […] Continue reading Optical illusions  My very own AVR ISP adapter on a breadboard. Breadboards are great! I mean the solderless breadboard type which you can get everywhere now for almost no money. I use them all the time to prototype electronics circuits and have been forcing my students to do the same. Most of my current […] Continue reading AVR ISP breadboard adapter |
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