Yesterday I received my first Arduino and I'm very happy. Of course I started to search for beginner tutorials and books. Most of the tutorials and books emphasize the programming side of the Arduno and very little the electronics side. I'm a programmer and the programming side isn't a problem for me but I don't understand the electronic side. Most of the tutorials contain schematics, photos of the Arduino board and almost no explanation what is this and why everything is connected this way. I really want to understand this thinks and not just to follow tutorials.
Can you tell me for some Arduino books, sites or tutorials which emphasize the electronics side of the Arduino.
As a side comment, the electronics side of the Arduino is basically just general electronics (i.e. there's nothing electronically special about the Arduino), so any Electronics for Beginners book/website will do.