Arduino Explained | Hardware and Software explained including schematic [external link]

Hi,
Following is the tutorial which explaines following things,

  1. Schematic Explained
  2. Bootloader
  3. How to use Web Editor
  4. How to Use Arduino IDE
  5. Example on LED Blink
  6. Example on Serial Interface
  7. Example on Switch interface using polling method
  8. Example on Switch interface using interrupt method
  9. Example on ADC

Here is the tutorial