Monday, December 28, 2009

Atom motherboard

Here is the board and its case.
The 1 GB CF is a bit too small, I'll get a bigger one soon.
Also, the holes for the 2.5" disk do not match my 44 pin cable length, so I'll create new holes for it.

Thursday, December 24, 2009

Robotic Crawler Video

Olivier made a video of his HSP Crawler first run, which I edited and put on dailymotion, so here it is :

Don't know how it will handle the 1kg Atom motherboard on top (we might break the weakest parts...), but looks promising...

Sunday, December 20, 2009

Unmanned Vehicle Project

With Philippe we have the project, since a very long time, to build an mobile camera, well, let's say a robot !
There's a lot of robot projects around the net, but one of the main identified problem is their lack of "agility".
That's why, for our first tests, we have prefered to choose a well proven basis instead of an "university project", the HSP Crawler :
Here in it's original configuration as i have received it :

Saturday, July 18, 2009

JPEG and PNG thumbnailing

In need for a fast and good looking thumbnailing solution for PNG and JPEG bitmaps, I came across this interesting article about Python's PIL and its rivals (Epeg and Imagemagick), so I decided to bench these solutions myself (even more since the various possible resizing methods were not tested).

For my bench, the thumbnail size is 320x200, which is quite a big thumbnail, but why not... (time is in seconds)

I'm no Python fanboy, but it looks like Python Image Library (in Bicubic mode) offers the best ratio speed/quality when you need to create thumbnails from jpeg and png.

Saturday, February 21, 2009

Cable goes HD

Now I have access to HD channels (720p)... and still a good connectivity.

Sunday, January 11, 2009

[Netlantis] New Server

I've just finished building a new server for Netlantis.

It has the following specs :
1 x Intel e8500 CPU
4 x 2 GB RAM PC6400 CL4
2 x Gigabyte iRAM 4 GB (in RAID 0)
2 x Seagate 250 GB HDD (in RAID 1)
1 x Seagate 250 GB spare HDD

Because of the size of the iRAM (and the bad design of this ASUS P5Q-Premium motherboard) I had to build some custom pieces (which was actually fun) and to use a 13 cm flexible PCI riser (bought on LinITX).

Here's what the server looks like :

If I were to build such a system now (I have my iRAM since 1 year now), I would choose an HyperDrive5 16GB drive... read more here. It has a disk (actually a compact flash) for backups (which is to me a better idea than a battery), has a better architecture, and is less expensive.

[Thoughts] Snow in Paris

Such a nice sunny morning in Paris, with a bit of snow...