I have been hacked!
How could this happen? My website has been hacked in the beginning of this week! As a reaction my provider immediately took it offline, because a script on the server has been used to send out spam… (more…)
Is your Windows computer getting slow?
My laptop very recently got much slower than usual. The harddisk LED was permanently on and it too ages for it to hibernate. I cleaned some garbage from the harddisk…
Uppsala county and its eight municipalities (map borrowed from the cache description).
A bicycle trip: all municipalities in Uppsala county – on a day
There is a geocaching challenge in Uppsala: to visit all 8 municipalities in the county of Uppsala within 24 hours. When I first saw this challenge, I wondered if it…
The humble capacitor
I just watched some videos and got inspired... Are Your Capacitors Installed Backwards? Capacitors 1965 US Air Force Training Film
Beinahe unentschieden, dann aber doch noch gerade gewonnen - aber was will mein Gegner im Chat?
Yesterday at QuizClash
Timing of the internal analog-to-digital converter of an ATmega328P with a 5 V supply voltage.
ATmega328P – measuring its own supply voltage III
[latexpage] After the first two parts of this series ATmega328P – measuring its own supply voltage ATmega328P – measuring its own supply voltage II where I investigated the possibility of…
A simple yet versatile testcircuit for the analod-to-digital converter.
ATmega328P – measuring its own supply voltage II
[latexpage] Here is a brief follow up from yesterday's post on the internal reference voltage VBG of the ATmega328P. I wrote a small test program where I wait for a…
A sketch of the test circuit on a breadboard.
ATmega328P – measuring its own supply voltage
[latexpage] The trick is not new, it is utilized in the AVR transistor tester which you can buy for quite cheap money from China, and it has been discussed in…
Bitmapped math in XeLaTeX output.
XeTeX and your math is bitmapped?
I have now been using XeLaTex exclusively for quite a while for all my LaTeX work, which essentially means for everything: lecture notes, lecture slides, lab instructions, letters, reports,... For…
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