Loading source-backed pinouts…
Microcontroller
Arduino Nano
The classic breadboard-friendly Arduino used in labs and small prototypes where UNO compatibility is needed in a compact package.
Processor
ATmega328P
Logic
5 V GPIO
Power
Mini-B USB, VIN, 5 V rail
Format
Breadboard Nano module
Check before wiring
- Mini-B USB and older bootloader behavior depend on board revision.
- Use level shifting for 3.3 V peripherals.
Interfaces
GPIOI2CSPIUARTADCPWMUSB
Source-backed connector
Interactive pin map
Pin map
Connector
Arduino Nano 30-pin dual header
USB at top, component side up, headers on both long edges
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Hover, tap, or focus a pad to inspect a pin. Use arrow keys to move between pins.
- Physical 2x15 layout with the USB connector at the top; labels follow the official Arduino Nano pinout.
- Classic Nano (ATmega328P) IO is 5 V; level-shift 3.3 V-only peripherals.
- A6 and A7 are analog-input-only and cannot be used as digital IO; A4/A5 are I2C SDA/SCL.
All 30 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | UART | UART | TXD | |
| 2 | UART | UART | RXD | |
| 3 | System | |||
| 4 | Ground | GND | ||
| 5 | GPIO | INT0 | ||
| 6 | PWM | INT1 | ||
| 7 | GPIO | |||
| 8 | PWM | |||
| 9 | PWM | |||
| 10 | GPIO | |||
| 11 | GPIO | |||
| 12 | PWM | |||
| 13 | PWM | SPI | SS | |
| 14 | PWM | SPI | MOSI | |
| 15 | SPI | SPI | MISO | |
| 16 | SPI | SPI | SCK / LED | |
| 17 | Power | 3V3 | ||
| 18 | Power | AREF | ||
| 19 | ADC | |||
| 20 | ADC | |||
| 21 | ADC | |||
| 22 | ADC | |||
| 23 | I2C | I2C | ||
| 24 | I2C | I2C | ||
| 25 | ADC | Analog input only; not a digital IO. | ||
| 26 | ADC | Analog input only; not a digital IO. | ||
| 27 | Power | 5V | ||
| 28 | System | |||
| 29 | Ground | GND | ||
| 30 | Power | VIN |
Why it matters
- Small footprint with the familiar Arduino programming model.
- Official documentation provides an interactive viewer and pinout.
- Still common in teaching kits and legacy fixtures.
Keep exploring
Similar boards
Adafruit ESP32-S3 Feather
same microcontroller platform · 7 shared interfaces
Adafruit Feather M4 Express
same microcontroller class · same microcontroller platform
Adafruit Feather nRF52840 Express
same microcontroller platform · 7 shared interfaces
Adafruit Feather RP2040
same microcontroller class · same microcontroller platform