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Alexandre Rosenberg

Email <My_first_name> <at> <r42> !ch
Interests Unix SysAdmin (Linux, BSD), computer Network, Python programming, Learning about electronics and Arduino, Japanese language and culture, Simracing, playing guitar (trying), good beer
Languages French, English, German, Japanese
Occupation Linux server and network SysAdmin
PGP Key Key ID:8FFB17EC Public key
Updated July 2015


Linux / BSD

I have been using Linux on most of my computer since 2007. Before that I have been mostly using Windows. My first PC was MS/DOS + windows 3.11 on a 486 when I was a small.

I am now working as a Linux and Network Sysadmin. Currently I mostly mange Linux and other Firewall as well as basic network services such as DNS, DHCP, Proxy, NTP.

Home Network

On my home network I run a Pfsense Router on an low power PC Engine APU board and a home-built storage server using FreeNAS and the ZFS filesystem.

Check out FreeNas and Pfsense which are two great open source project (which just happen to use BSD).


I am trying to acquire basic electronic knowledge: Proper soldering, understanding circuit and components, using a Oscilloscope (…).

I've also been playing with Arduino.


Beside some (ugly) bash programming, I also have some python programming knowledge.


  • Raspberry Pi: Great little device for hacking. And now the Raspberry pi2 as well.
  • Pandora: Hybrid between a mini Linux computer and a gaming device. http://openpandora.org/
    • I am likely the new the new version (Pyra coming up soonish)
  • As a MeeGo/Maemo enthusiast (Linux OS used on Nokia N900 and N9), I got the spiritual successor: A Jolla phone. I am quite happy with it. And I hacked inductive charging onto it.

Previous / "old" adgets

  • The “Ultimate” geek phone: Nokia N900. Possibly the only phone with a keyboard shortcut for opening a terminal (out of the box).


Here are some projects I did or am working on during my free time.

I also do various things for the LAB / PostTenebrasLab: Netwok cabling, space improvement, bit of cleaning (unfortunately), helping with SysAdmin and Wiki/website.

2015 - Arduino / PTL-ino shield Luxseptem

  • First PCB design (to be milled at the LAB)
  • Very simple arduino shield with 7 Led
  • Intended for use with PTL-ino or Arduino Uno
  • Might be used for LemanMake event (Workshop or stand)

More info: Shield Luxseptem

2015 - 555 timer

  • Did a simple 555 timer circuit on breadboard (blog entry)
  • Soldered “Three Fives” Discrete 555 Timer Kit from Evilmadscientist

I am also using those as an excuse to start playing with the lab Oscilloscope.

2014 - PTL control panel

  • Worked on the PTL control panel started by sinux
  • Most of the hardware / arduino was already done (only made small changes)
  • Did the spaceAPI integration and python code to update status (…)

More info: http://www.posttenebraslab.ch/status

2012 - GPIO Fun

Using the GPIO on the Raspberry Pi


2012 - TM 1638

Try go get the TM1638 working on the Rpi. Waiting for it to arrive (ordered from Dx)

RPi forum: some code to get TM1638 to work on the RPi: http://www.raspberrypi.org/phpBB3/viewtopic.php?t=10787&p=119969

2013 RPi as Squeezebox player

I am now running my RPi as a dedicated Squeezebox player. I am using Squeezeslave and an external USB soundcard. I have a small 2x15w class D board from Sure electronic connected directly (no preamp). Works great for now ;)

Still in use in 2015. I am planning for some improvements…

2013 LCD Matrix screen

USB 40×2 White Characters LCD Module HD44780 U402MB-B1

Getting it to work with LCDd deamon



association/people/arekkusu/start.txt · Dernière modification: 2015/06/06 16:06 par arekkusu