The pinout diagrams are simple, but they're easy to read, and especially helpful for beginners. You can print them out full size so you can set your Arduino Uno, ATMega, or ATTiny right on top for ...

Input and Output Each of the 14 digital pins on the Arduino Uno can be used as an input or output, using pinMode(), digitalWrite(), ... Typically used to add a reset button to shields which block the ...

Both the Arduino Nano and Uno can be powered via their integrated USB connectors. This automatically supplies regulated 5V power to the board, allowing you to use any USB-supported power source ...