Nano Board R3 with CH340 Chip without USB Cable Compatible with Arduino (Unsoldered)
The Nano Board R3 with CH340 chip (without USB cable) is a compact, cost-effective alternative to the traditional Arduino Nano. Based on the popular ATmega328 microcontroller (Nano R3), it offers the same functionality as the Arduino Uno, but in a much smaller form factor, making it perfect for space-constrained projects.
This version of the Nano is equipped with the CH340 USB-to-Serial chip, which replaces the FTDI chip found in earlier versions, offering a more affordable solution while maintaining reliable performance. Due to its small size, it is especially well-suited for projects where a reduced pinout is acceptable, but space efficiency is crucial.
The Nano R3 features 14 digital I/O pins (6 of which are PWM capable), 8 analog inputs, and operates at a clock speed of 16 MHz. It has 32 KB of flash memory for your sketches and programs. The board is breadboard-friendly, making it easy to integrate into prototypes without taking up much space.
The Nano can be powered via a mini-USB connection, an unregulated 6-20V external power supply (via pin 30), or a regulated 5V external power supply (via pin 27). The power source is automatically selected based on the highest voltage input.
With its small size of just 43 mm x 18 mm, this Nano Board R3 with CH340 chip is an excellent choice for DIY electronics, robotics, and small embedded systems where both performance and compactness are key.
Note: –
- CH340 chip might not work directly with some PC/Laptop, you will need some ch340 drivers.
Features
1 pair of TTL level serial transceiver ports RX / TX
Using Atmel Atmega328P-AU MCU
There is a bootloader installed in it
Support USB download and Power
Support for external 5V ~ 12V DC power supply
It Supports power supply by 9V battery
Support ISP download
Automatic reset during program download.
Power OK blue LED on the bottom.
Green (TX), red (RX) and orange (L) LED.
+5V to AREF jumper.
Auto-sensing/switching power input.
Small mini-B USB for programming and serial monitor.
ICSP header for direct program download.
Standard 0.1” spacing DIP (breadboard friendly).
Manual reset switch.
Specification
| Input Voltage (V) | 7 to 12 |
|---|---|
| Digital I/O Pins | 14 |
| Analog I/O Pins | 8 |
| DC Current per I/O Pin (mA) | 40 |
| Input Port | MINI USB |
| Flash Memory | 32 KB |
| SRAM | 2 |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| Weight (g) | 6 |
| PCB Size (L x W) mm | 43 x 18 |
Application
Provides common modem liaison signal
used to expand UART interface of computer or upgrade the common serial device to USB bus directly.
Package Includes:
1 x Arduino Nano R3 Compatible Board Unsoldered
Manual for New Windows
Manual for Old Windows
Video
Harshal Solanke (verified owner) –
Product was good