Arduino Nano Board R3 with CH340 Chip

Nano Board R3 with CH340 Chip (Unsoldered, No USB Cable) – Arduino Compatible

The Nano Board R3 with CH340 Chip is a compact and versatile microcontroller board based on the popular Arduino platform. It offers all the functionality of the Arduino Uno but in a smaller form factor, making it ideal for projects where space is limited.

This Nano board is equipped with a cost-effective CH340 USB-to-Serial chip, which reduces the overall price compared to older versions that used the FTDI chip. Despite its small size, the Nano R3 is packed with features, including an ATmega328 microcontroller, 14 digital I/O pins (6 of which support PWM), and 8 analog inputs.

Power Options: The Nano can be powered via the Mini-USB connection, an unregulated external power supply (6-20V via pin 30), or a regulated 5V external power supply (via pin 27). The board automatically selects the highest voltage source to power the system.

Key Features:

• 1 pair of TTL level serial transceiver ports (RX/TX)
• ATmega328P-AU microcontroller with pre-installed bootloader
• Supports USB power and data transfer
• Compatible with external power supplies (5V ~ 12V DC)
• 9V battery compatible
• ISP download support for direct programming
• Automatic reset during programming
• Status LEDs: Power OK (blue), TX (green), RX (red), and L (orange)
• +5V to AREF jumper
• Auto-sensing and switching power input
• Small Mini-B USB port for programming and serial communication
• ICSP header for direct programming
• Standard 0.1” DIP spacing for easy breadboard integration
• Manual reset switch

Specifications:

• Input Voltage: 7-12V
• Digital I/O Pins: 14
• Analog I/O Pins: 8
• DC Current per I/O Pin: 40mA
• Flash Memory: 32KB
• SRAM: 2KB
• EEPROM: 1KB
• Clock Speed: 16MHz
• Weight: 6g
• PCB Size: 43mm x 18mm

Applications:

• Ideal for expanding UART interfaces or upgrading serial devices to USB
• Commonly used in projects requiring a small footprint microcontroller

Package Includes:

• 1 x Arduino Nano R3 Compatible Board (Unsoldered)