I have Arduino microcontroller and I have use it mainly with Pure Data. I have made only some experiments with it but I am curious to know if some have made useful sounds related systems with Arduino or other microcontrollers?
Flossmanual have tutorial for pduino (http://en.flossmanuals.net/pure-data/sensors/pduino) and I have made a light sensor "theremin" or something like that based on flossmanual tutorial. On internet there are a lot of information concerning Arduino and robotics. Some project with servo motors would be nice but I haven't got that far.
I have been trying to find good noisy things to do with these, I have some links somewhere (I think I made a thread on maniacs only), will post soon
The reason I even bought one in the first place was to make a midi interface for the gameboy, yet to get round to that tho, I should soon :-S
Here's the MO thread, some useful links in there: http://www.maniacsonly.com/forum/viewtopic.php?f=4&t=265
New tutorial for Arduino and Pure Data:
http://patchingcircleathens.labyrinthos.gr/arduino-for-pders/