As I started with my first experiments with the, recently bought, Arduino board (I'm mainly reproducing examples provided with development software) I've also started looking for a good program for sharing circuit schematics. There are many Linux programs to draw circuit schematics, I played a little with KiCad for example, but usually these programs aren't suited for producing images to be shared on the net. This is not surprising if you think that usually a circuit CAD program is required to produce high quality output for printing (or plotting) of very complex hardware projects while my requirements were quite the opposite. What I was looking for was a program to easily produce low quality images of very simple circuits.
Fritzing is a open source tool specifically aimed to the documentation, sharing and teaching of electronic projects. I downloaded the Linux 32 Bit version from the download page and extracted it in "/opt/" folder:
sudo mv fritzing.2010.04.16.linux.i386.tar.bz2 /opt/sudo tar xvjf fritzing.2010.04.16.linux.i386.tar.bz2
then I started it by executing the "Fritzing.sh" script