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Arduino Nano is a compact 5 V development board based on the ATmega328 microcontroller, designed for prototypes and installations where available space is limited. Its form factor and pin headers allow it to be used directly on a breadboard. It features a Mini-B USB connector and has no dedicated DC barrel power jack.
The microcontroller runs the program uploaded by the user and handles signals from sensors, indicators and other circuits connected to the board. Its small size and connectivity make it suitable for prototyping, robotics, environmental monitoring and control systems. It provides digital and analogue I/O, PWM outputs and 5 V TTL UART, I2C (TWI) and SPI interfaces for communication with peripherals and other circuits.
To get started, the board can be programmed using Arduino IDE. When connected to a computer with a Mini-B USB cable, Arduino Nano should be selected under the Arduino AVR Boards package. ICSP programming with an external programmer is also supported. The classic Nano has no built-in Wi-Fi or Bluetooth LE, so applications requiring wireless connectivity need additional hardware.
The board can be powered over USB, through VIN with 7–12 V, or from a regulated 5 V supply. The I/O operates at 5 V; the maximum current per I/O pin is 20 mA and the 3.3 V output has a maximum current of 50 mA. These limits should be taken into account when connecting sensors, modules and other peripherals.
| Brand | Arduino |
| Model | Nano |
| Manufacturer reference | A000005 |
| Microcontroller | ATmega328 |
| Architecture | AVR |
| Operating voltage | 5 V |
| Clock frequency | 16 MHz |
| Flash memory | 32 kB, of which 2 kB are used by the bootloader |
| SRAM | 2 kB |
| EEPROM | 1 kB |
| Digital I/O | 20 in total: D0–D13 and A0–A5 configurable as digital I/O |
| PWM outputs | 6 |
| Analogue inputs | 8 (A0–A7); A6 and A7 are analogue-only |
| Analogue input resolution | 10 bits |
| Communication interfaces | 5 V TTL UART, I2C (TWI), SPI |
| USB connector | Mini-B USB |
| Programming | USB via bootloader / ICSP |
| Input voltage (VIN) | 7–12 V |
| Regulated supply | 5 V |
| Maximum current per I/O pin | 20 mA |
| Maximum current from 3.3 V output | 50 mA |
| Dimensions (length × width) | 45 × 18 mm |
| Weight | 7 g |
LCA1009
