Arduino Nano Manual

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Frequently Asked Questions

• What is the use of Arduino Nano?

  The smaller version of the Arduino Uno, the Arduino Nano, is often used for projects where space for the board itself is very limited. Like its larger counterpart, it is based on the powerful ATmega328 microcontroller from the US company Atmel, and it can be used for simple and complex projects alike.

• Is the Arduino Nano based on the ATmega328?

  The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one.

• What kind of power supply does an Arduino Nano use?

  The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.

• Can an Arduino Nano communicate with a computer?

  The Arduino Nano has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega328 provide UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX).

• Is the Arduino Nano missing a power jack?

  It has everything that Diecimila/Duemilanove has (electrically) with more analog input pins and onboard +5V AREF jumper. Physically, it is missing power jack. The Nano is automatically sense and switch to the higher potential source of power, there is no need for the power select jumper.