I was looking for a simple experimentation board for Arduino newcomers, able tu run without any"breadboard"and ready to use. I also was looking for a small (and functional)"smd soldering practice board"with big"thru"components, and smaller and smaller SMDs (0804 or 0603 are the smallest devices).
A full description of the board (in French) has been"wikied"at
(with a glorious picture of the very first prototype)
and a repository of all the kicad files could be found on github
More than 150 board have been built so far, integrated in various projects.