Category Archives: Uncategorized

Dexter, the TableBot

By | November 14, 2014

I’m trying to attend the monthly meetings of the HomeBrew Robotics Club since around this summer. They are quite fun when you’re interested in hobby robotics and can make it to the San Francisco Bay Area 😉 During one of my first meetings I learned about the tablebot challenge. That sounded like an interesting task… Read More »

Yubikey and Linux Auto-ScreenLock

By | October 28, 2014

OK, I got a set of YubiKey‘s some time ago and I use one to supplement my Linux desktop login. But I wanted to lock my screen automatically when I remove my YubiKey-Nano. So I wrote a little Python daemon which is auto-started on login and watches for USB remove events. Once the USB-subsystem reports… Read More »

OpenSprinker Pi – Hardware Complete

By | April 30, 2014

I was thinking about a more flexible sprinkler controller for a very long time. We have circuits which would benefit from different patterns, from the normal lawn watering to drip circuits for some flower/veggie beds to some pots and even some soaker-hoses for trees. When I saw Daniel’s setup @ Garden Automation, I knew that… Read More »

UNI-T UT61E and Linux

By | April 28, 2014

For a long time, I was working with a very cheap multimeter, that I picked up somewhere at a sale. But I decided, it is time to upgrade to a bit better tool;-) Of course, when you look at electronics testing/measuring equipment, everybody knows about Fluke. But for me this is just a hobby, so… Read More »

Lunar Eclipse – April 2014

By | April 15, 2014

Just some photos from last night’s lunar eclipse. I was mostly lucky, the high clouds did not materialize as much as feared;-) I did only stay up until about the peak of the eclipse. That was long enough for me;-)

Robotis CM-900 and Pololu MinIMU-9

By | January 11, 2014

I played with the Robotis CM-900 and the little MinIMU board before. But so far, I always used the Arduino libraries directly from Pololu. One example was my little teddy seat😉 This time around, I decided to take the Arduino out of the equation and and let the CM-900 do the I2C communication with the… Read More »

Solaris 11 – IPS Packages and Puppet

By | March 18, 2013

Our installation runs on Solaris 11 zones with many custom built IPS packages. That all works pretty well but sometimes config files need to change depending on which version of a package is installed or even if a particular package is installed at all on that zone. To make that information available to puppet, I… Read More »