The Arduino NANO is a smaller, breadboard-friendlier version of the Arduino UNO. This Arduino NANO Pinout diagram reference is a handy guide for using this board:
Arduino NANO Pinout Description
The Arduino NANO pins, similar to the UNO, is divided into digital pins, analog pins and power pins. The NANO has two more analog pins, however. There are pins with secondary functions on the table below. These secondary pins are mostly communications pins such as I2C and SPI.
Also notice that the ATMega pins for each Arduino pin are also provided in the pinout diagram above. For details on how to use these pins, see Arduino Port Manipulation.[the_ad id=”3059″]
Arduino NANO Schematic Diagram
The Arduino NANO is originally designed by Gravitech and has been included as one of the official Arduino boards. Here is its schematic diagram: