Thanks Massimo!
just to be sure.... like this?
Also, i'm still wondering....
what is the use of the 5V / 9V Power output pins on the Arduino board?? If i remember correctly, when arduino is powered by an external supply (ie not USB), the 9V pin actually outputs the same voltage as the supply voltage. So, if I run arduino on a 12V power supply, don't I get the clean 5V and unregulated 12V that i need?
Regards / Jonathan