Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source code as comments, documenting the pinouts for your ...

For those starting out in Arduino, there are tons of resources to get better acquainted with the community and the types of projects you can tinker with.

Next is the complete schematic diagram of a little Arduino board for your everyday projects. Use the Atmega328P chip, with Arduino bootloader loaded by you, as the brain of this economical circuit.

Arduino, the world's leading open-source hardware and software platform, today announced the launch of its next-generation UNO board, a significant re ...

(After noticing this change, we went back and compared the “rev3” Uno schematics PDF on arduino.cc to the “rev3E” schematics on arduino.org. Yup, same change in the legal notice.) ...