Overview
The Arduino Nano R3 is a small, breadboard-friendly microcontroller board based on the ATmega328P. It is ideal for embedded electronics, robotics, IoT, and STEM learning projects. Despite its tiny size, it offers full Arduino functionality, making it perfect for prototyping and educational labs.
Key Features
Microcontroller: ATmega328P
Operating Voltage: 5 V
Logic Level: 5 V
USB Connectivity: Mini USB for programming and power
Compatible with Arduino IDE (Windows, macOS, Linux)
Small form factor: 45 × 18 mm, fits easily on breadboards
Supports digital and analog I/O, PWM, UART, SPI, I2C
Technical Specifications
| Feature | Specification |
|---|---|
| Microcontroller | ATmega328P |
| Operating Voltage | 5 V |
| Input Voltage (recommended) | 7–12 V via Vin pin |
| Input Voltage (limits) | 6–20 V via Vin pin |
| Digital I/O Pins | 14 (D0–D13) |
| PWM Channels | 6 (D3, D5, D6, D9, D10, D11) |
| Analog Input Pins | 8 (A0–A7) |
| Flash Memory | 32 KB (ATmega328P) – 2 KB used by bootloader |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| USB Interface | Mini USB, TTL-serial via FT232/CH340 |
| Dimensions | 45 × 18 mm |
Connectivity & Interfaces
UART (Serial): D0 (RX) / D1 (TX)
I2C: A4 (SDA), A5 (SCL)
SPI: D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK)
PWM Outputs: D3, D5, D6, D9, D10, D11
Applications
Breadboard prototyping for electronics projects
IoT devices with sensors and actuators
Robotics and motor control projects
STEM lab exercises and educational kits
Data logging and small automation systems
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