I’ve been writing here since end of last year: http://znuh.blogspot.com
Don’t expect a 100% technical blog but several german complaints and stuff as well.
January 19, 2009
August 5, 2007
Chaos Communication Camp
With a bunch of fellow hackers from Bavaria I’ll be at the CCC Camp 2007. We’ll form the Village Camp Woiperdinger.
So if you’re at the camp anyway, feel free to drop by at Camp Woiperdinger if you’re in the mood for a reallife chat with me.
Apart from beer, video projection installation(s?) (with video games on it!11) and having a great time there in general, we’ll of course have hacking projects as well.
Mine is a radio controlled model car (Monster Beetle), kindly provided by my great friend hackbard – though he can’t be at the camp himself 
< - see the sad smiley, hackbard!?!?!11
Now since there's nothing special about usual RC cars, I'll add a color VGA camera and a 802.11g Wifi link for steering and live video streaming 
And all this without using ugly x86 technology...
July 16, 2007
Gratulation an DHL!
Dass mein Elektronikkrampaket das am Samstag früh um 3 im Paketzentrum eintraf und sich seit Samstag früh um 6 in der Zustellung befand am Montag früh um 10 vor 8 dochnoch in der direkt (~100m) vor dem Paketzentrum gelegenen Packstation 108 eintraf!
March 26, 2007
PicooZ remote control checksum riddle
Last week I got myself one of those infrared controlled miniature indoor flying helicopters. Needless to say I wanna do sth. special with it. So the first step is teaching a PC how to control the thing.Instead of connecting the computer to the remote control I decided to sniff the IR signals and build my own IR transmitter.
The carrier is 37.31kHz, the protocol is rather simple – 15 bits (along with some sync pulses) are transmitted using pulse length/distance modulation. (I sniffed it using a 36 or 38kHz TSOP.)
The meaning of the bits is obvious so far. However, the checksum eludes me:
Ad|Up |Trim|L/R|Ck --+----+----+---+-- .#|...#|....|...|.# .#|..##|....|..#|.# .#|.##.|....|...|..
March 7, 2007
Reallife xeyes
A while ago I had the idea of porting xeyes to reallife. After I had them readily standing around for some time now, I decided to finally install them behind a window in the 1st floor so they can watch passers-by on the street. A video can be found here. More pictures are here.
February 19, 2007
Shiny colorful pictures!
Just created myself a tiny web photo album. Maybe I’ll post new pictures more often than new blog items…
So the first project you can find there: A blue/white LED-bar for my corridor. All 24 LEDs can be controlled individually with no more but 3 digital signals for all of them.
This sounds like some shift register magic and that’s exactly what it is 
I’m using 3x 74hc595 as they are cheap, easy to obtain, can do 35mA per output, can be interlinked since they have serial outputs and they also have output latches (that’s what the 3rd signal is used for).
I’m currently working on the microcontroller code to do PWM on each of the LEDs. A bit of assembler fiddling is necessary here since the C-code I tried yet is quite flickery.
I’m wondering wether the bottleneck will be my asm code for the AVR (ATTiny2313) or the ~5 meter wires.
I’ll post the code once it works well enough.
February 13, 2007
Der Bundestrojaner
Beim 2. Bier kam mir heute Abend in der Stadt die Idee ein Bundestrojanersymbol fürs GNOME-Panel zu bauen.
Da nicht nur ich sondern auch der (vollkommen nüchterne) M.b. das für eine spassige Idee hielt hier nun das Resultat
(more…)
August 5, 2006
Still alive…
Long time no new post. In the meantime some stuff happened. For example the lectures at university are over now and I managed to get 17 theoretic computer science credit points (they’re the hardest ones for me) Only one left to go…
Although the lack of new posts might imply I was a hard-learning student, I wasn’t really. I messed around with various stuff instead and just didn’t bother writing new posts
The stuff I messed with includes:
- the OpenAL based 3d-Audio stuff I promised – didn’t get it working – note to myself: Don’t forget to rant a lot about autoconf/make here!
- enabling PAL output for Koppi’s MSNTV2 Box
- locating JTAG interfaces in embedded devices
- working a bit on a bluetooth sniffer
- my new mobile phone: a Motorola RAZR V3i (I got a bit upset and slammed my old S55 against a wall…)
- an Arcor Starterbox (DSL Splitter + integrated Terminal Adapter) – did you know it got half an MByte of (semi-stripped) firmware and accepts commands from a serial interface?
- 802.11 fuzzing with lobo – we focused on Mgmt frames with variable length information elements (primary probe requests)
So there’s a lot to write about in the next days.
Oh. You also might have noticed my new piratebay-supporting theme I installed due to the raid
Maybe I’ll write a bit about my thoughts on that as well. I also removed the “Films I saw” page since I’m boycotting major hollywood films since the raid. It’s about time to reduce the power & influence of the MPAA.
April 26, 2006
upcoming temporary blog downtime
The blog will be unavailable from thursday this week until saturday this week since geekheim is going on a journey to Amsterdam.
After the relocation (saturday if I get the text done until then) I’m willing to present you some words about 3D-Audio with OpenAL.
Since lectures at university have started again, I gotta move some timeslices from the hacking to the learning bin . Thus the time intervals between new posts might increase a bit.
But I consider posting some lecture-related cognitions and thoughts as well.
For example I’m attending a quite promising introduction to systems theory.
Good lectures often give me thought-provoking impulses resulting in project ideas. The problem with these ideas is that you don’t really have the time to play with them since you have to pay more attention to other (compulsory) lectures
April 15, 2006
Giving Ubuntu Dapper Drake Flight6 a try
It all started with my broken router. More precisely, with my father buying an 2×866MHz Apple PowerMac G4 so that I wouldn’t have to reinstall Windows every few months.
This worked very well until the 2nd CPU burned out. Since I had no idea how to build my own darwin kernel (particularly without a working OSX installation…), I tried a non-SMP linuxkernel and it worked. (With SMP enabled, the kernel crashed due to the broken CPU.)
I installed Ubuntu and OpenOffice on the Apple so my father got his computer back with 50% less processing power but also with much less graphical processing power wastage