The Nano Board R3 (CH340 Unsoldered) provides full Arduino UNO R3 functionality in a miniature form factor (~43mm × 18mm) with maximum assembly flexibility. Delivered with unattached male pin header strips, this version allows developers and DIY electronics enthusiasts to tailor header orientation, solder wire leads directly, or mount the board flush against custom PCBs or expansion shields.

Powered by the ATmega328P 8-bit AVR processor, the board features an onboard CH340 USB-to-Serial converter that communicates seamlessly via its standard Mini-USB port. It offers 8 analog input channels (A0 to A7)—giving you two additional analog inputs compared to the UNO R3—along with 14 digital I/O pins for motor drivers, sensors, displays, and communication modules.

Technical Specifications

Key Features & Highlights

• Flexible Unsoldered Header Pins: Includes unattached 0.1″ (2.54mm) pin headers so you can customize soldering arrangements (top-side, bottom-side, right-angle, or direct wire soldering).
• Mini-USB Connectivity: Universal Mini-USB interface handles code uploading and serial monitoring through the Arduino IDE or PlatformIO.
• 8 Analog Input Channels: Provides extra analog inputs (A0–A7) over the standard UNO board format for multi-sensor measurement setups.
• Onboard Power & Voltage Regulator: Safely accepts 7V–12V power input on the VIN pin or runs directly from standard 5V USB power.
• Standard DIP Breadboard Spacing: Designed to fit standard solderless breadboards once headers are attached.

Common Applications

• Low-profile custom PCB stacks and space-restricted electronics housings.
• Wearable technology, interactive art installations, and portable gadgets.
• Compact robotics, line followers, and sensor monitoring nodes.
• Educational soldering practice and DIY maker projects.