Category Archives: Misc
In 2012 I wrote about my „first“ robot, the „rob01„. But actually it is not true that this was my first autonomous robot. Lately my father found the long lost „rob00“ on his attic. In ~1988 I build a robot at school as part of an entry to „Jungend Forscht„, together with my fried Gustav […]
In a previous post, I already tried to describe how the scheduling format of the EDIMAX Smart plug is to be encoded. Actually I think what was described there was confusing and not a 100% correct. Thus, here some additions and corrections. (Actually, all is pretty simple, since each minute of the day is represented […]
NOTE: Some of the content below is misleading! I tired to correct this in an other post. Thus, please make sure to read this post too! As an response to my article on operating the EDIMAX Smart Plug with Python today I got an E-Mail from Jorge, asking if I could give some details on […]
Added a setup-script to cross-compile the Linux kenel module for the RC outlets for the Raspbarry Pi. To be able to cross-compile the module, in brief the following needs to be done: Install ARM cross-gcc On Ubuntu: sudo apt-get install gcc-arm-linux-gnueabi make ncurses-dev Get RasPi Kernel E.g. use Kernel from GIT: git clone https://github.com/raspberrypi/linux.git linux-raspberrypi […]
Made a overview of how the over-air protocol looks for the Pollin RC Switches (see previous article for more details). The length of the pulses is a multible of 350us. The wave-forms where captured with an OpenBench logic sniffer.
At Google I/O this year, Cardboard was presented. Cardboard are DIY 3D goggles made of cardboard, using a smart phone as screen and sensor device. Cardboard seams to be based on OpenDive from Stefan Welker who also published the STL files for 3D printing his goggles on ThingiVerse. And printing them was exactly what I […]
Today I think I 3D printed my first real useful thing. This „thing“ sits on the bottom border of our windows and helps keeping them pack (against cold air). Unfortunately I don’t know the name of this thing, so I decided to call it the „window thing“. One of our windows was missing the „window […]
I roughly put together most of the electronic parts needed to make the robot drive. The video shows operation of the two motors through my cellphone using Bluetooth. Also I added basic playback of PCM audio files through a speaker I connected to the Propeller. The audio is a must to play back the typical […]
Here are some pictures showing how to crack a Sansa Shaker MP3 player open. The main „trick“ is to remove the two rings (which one uses to control volume or skip tracks). After the rings are removed, the cover could be taken into two half’s by removing the small screws which are hidden under the rings.
Using gstreamers gst-launch, one could easily record the live stream from a webcam directly to an OGG-container using theora-encoding. By splitting the input from the v4l source (through „tee“) into two parallel sub-pipes, it is possible to show the recorded stream on the screen, while saving it to the OGG-file on the other processing path. […]