How Arduino Works

A collection of notes on how Arduino works

Where to put external libraries on a Mac

The preferred place is Documents -> Arduino -> libraries. If you haven’t got a libraries folder inside the Arduino one then create one and put the extra user libraries here. (From this post on the Arduino forum. Thanks Sudhu!)

Interrupts:
http://popdevelop.com/2010/04/mastering-timer-interrupts-on-the-arduino/
http://www.codeproject.com/KB/system/Arduino_interrupts.aspx

http://scolton.blogspot.com/2010/07/arduino-interrupt-driven-servo-routine.html