The Nano R3 CH340 Chip Board with USB Mini Cable is based on the popular Arduino platform, offering the same functionality as the Uno but in a smaller, more compact form.
This Nano board is ideal for projects where a small size is crucial but extensive pinouts aren't necessary. It features a cost-effective CH340 USB-to-Serial chip, making it more affordable than earlier versions that used the FTDI USB-Serial chip.
The Nano is a complete, breadboard-friendly board based on the ATmega328P (Nano R3). It delivers similar performance to the Arduino Uno but in a smaller package. It does not include a DC power jack and instead uses a Mini-B USB cable for both power and communication.
The board can be powered through the Mini-USB connection, an unregulated 6-20V external power supply (connected to pin 30), or a regulated 5V external supply (connected to pin 27). The power source is automatically selected based on the highest voltage available.
Measuring just 43 mm x 18 mm, the Nano V3.0 with CH340 chip provides 14 digital I/O pins (6 with PWM support), 8 analog inputs, a 16 MHz clock speed, and 32 KB of flash memory.
 
Features:
1 pair of TTL-level serial transceiver ports (RX/TX)
Powered by Atmel ATmega328P-AU microcontroller
Bootloader pre-installed for easy programming
Supports USB download and power
External DC power supply support (5V–12V)
Can be powered by a 9V battery
Supports ISP download for direct programming
Automatic reset during program download
Power OK blue LED indicator
Green (TX), Red (RX), and Orange (L) status LEDs
+5V to AREF jumper for custom voltage reference
Auto-sensing/switching power input
Mini-B USB for programming and serial communication
ICSP header for direct program download
Breadboard-friendly with standard 0.1” spacing DIP
Manual reset switch for control
Package Includes:
1 × Nano R3 CH340 Chip Board with USB Mini Cable (Soldered) – Arduino Compatible