Nano R3 Development Board – ATmega328P with CH340 Chip (Arduino-Compatible)
Big performance doesn’t require big spaces. The Nano R3 Development Board packs all the processing muscle, memory, and pin functionalities of the classic Arduino Uno into a tiny, breadboard-friendly footprint.
Built around the reliable ATmega328P microcontroller and the cost-effective CH340 USB-to-UART converter chip, this board is the ultimate choice for embedded systems, compact robotics, and permanent project installations where space and budget are critical constraints.
Key Features
Compact & Breadboard Friendly: Its small form factor breaks out all pins into a dual-inline package (DIP) layout, plugging directly into standard breadboards for seamless prototyping.
Full Uno Capabilities: Runs on the identical ATmega328P architecture as larger boards, ensuring 100% compatibility with your existing Arduino IDE sketches, standard libraries, and tutorials.
Onboard Power Flexibility: Can be powered via the convenient Mini-USB port or through an unregulated external power supply connected directly to the RAW pin.
Cost-Efficient USB Interface: Equipped with the high-performance CH340G chip for stable serial data communication and reliable code uploads from your computer.
Pre-Soldered convenience: Arrives with high-quality, pre-soldered header pins, allowing you to jump straight into wiring your project without needing a soldering iron.
Technical Specifications
Feature | Specification |
Microcontroller | ATmega328P |
Operating Voltage | 5V |
Input Voltage (Recommended) | 7V – 12V (via RAW pin) |
Input Voltage (Limits) | 6V – 20V |
Digital I/O Pins | 14 (of which 6 provide hardware PWM output) |
Analog Input Pins | 8 (10-bit resolution; 2 more than the Arduino Uno) |
DC Current per I/O Pin | 40 mA |
Flash Memory | 32 KB (2 KB used by the bootloader) |
SRAM / EEPROM | 2 KB / 1 KB |
Clock Speed | 16 MHz |
USB Interface Chip | CH340G |
Dimensions | 45 mm x 18 mm |
Pinout & Communication Layout
The Nano R3 breaks out an expansive array of pins to give your compact projects full sensory and communication control:
Power Management: Includes 5V, 3V3, GND, and the RAW pin (for unregulated external power input).
Pulse Width Modulation (PWM): Pins D3, D5, D6, D9, D10, and D11 provide native 8-bit analog outputs to control motor drivers or LED dimmers.
Extra Analog Inputs: Features pins A6 and A7 alongside standard pins A0-A5, giving you more channels to read analog sensors.
Standard Protocols: Supports I2C communication on pins A4 (SDA) and A5 (SCL), and hardware SPI communication on pins D10 (SS), D11 (MOSI), D12 (MISO), and D13 (SCK).
Common Applications
Compact Robotics: Excellent for small walking robots, line followers, and drone control systems.
IoT Sensor Nodes: Fits perfectly inside small custom enclosures for environmental monitoring or security setups.
DIY Smart Gadgets: Ideal for custom handheld gaming consoles, wearable tech, and smart alarm clocks.
Note for Users: If your computer does not automatically detect the board upon connection, simply download and install the standard CH340 driver for Windows/macOS. When uploading code via the Arduino IDE, select "Arduino Nano" as the board, and if necessary, toggle the processor setting to "ATmega328P (Old Bootloader)" depending on your IDE configuration.
Package Includes:
1 x Nano R3 Development Board with CH340 Chip (Pre-Soldered Headers)