Arduino Nano R3 CH340 Un-Soldered

The Arduino Nano R3 CH340 Un-Soldered is a compact, breadboard-friendly microcontroller board based on the ATmega328P supplied without soldered headers. Its small form factor and unpopulated pins make it ideal for custom permanent installations and space-constrained projects.

Key Features

• Un-soldered headers for custom wiring and permanent installation
• Compact size (45mm x 18mm) fits standard breadboards
• ATmega328P microcontroller with full Arduino compatibility
• CH340 USB chip for programming and serial communication
• 22 digital I/O pins including PWM and SPI
• 8 analog inputs (2 more than Arduino Uno)
• Low power consumption suitable for battery projects

Technical Specifications

Applications

• Custom PCB integration without header height
• Permanent installations with direct wire soldering
• Compact wearable projects with custom connectors
• Space-constrained robotics and drone controllers
• Production builds requiring direct wire attachment
• Advanced users who prefer custom header configurations

Important Notes

• Headers not included – solder your own or wire directly
• Install CH340 driver before first use on Windows/Mac
• Select ‘Arduino Nano’ in Arduino IDE
• Requires soldering skills for header installation
• More durable for permanent/vibration-prone installations