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Uno R3 CH340 Arduino Compatible

The R3 UNO CH340 is an excellent choice for beginners looking to start with microcontroller projects. It features the ATmega328P microcontroller, offering plenty of memory and performance for a wide range of applications. One key difference in this board is its use of the CH340 chip for USB-to-serial conversion, compared to the ATmega16U2 chip found in the official Arduino UNO R3. The CH340 is a cost-effective alternative, making the board more affordable. However, it requires a separate driver installation, which can be easily downloaded online. This chip provides reliable communication, though sometimes at slower speeds than the ATmega16U2, and does not support reprogramming as a USB HID device.

To get started with the R3 UNO CH340, you'll need to download the Arduino IDE from the Arduino website and install the CH340 driver. This driver is necessary for the board to communicate with your computer. Once installed, connect the board to your computer with a USB Type B cable, select the appropriate board and port in the Arduino IDE, and you can start writing and uploading your code. The built-in LED on pin 13 is perfect for testing your first programs.

Buying the R3 UNO CH340 gives you access to a powerful and easy-to-use development board. There are many online resources, tutorials, and community forums to help you with your projects. Whether you're learning the basics of electronics or working on more advanced projects, the R3 UNO CH340 is a reliable and affordable choice. Its open-source design means you can customize and modify it to fit your needs, making it a flexible tool for various applications. While it may lack the advanced features of the ATmega16U2 chip, such as faster communication speeds and reprogrammability, the CH340-based board remains a highly effective and budget-friendly option.



  • USB-to-Serial Conversion: The CH340 chip provides a USB-to-serial interface for communication with a computer, allowing programming and serial communication.
  • Compatibility: Fully compatible with Arduino IDE and various shields designed for Arduino UNO.
  • Resettable Polyfuse: Protects your computer's USB ports from shorts and overcurrent.
  • Built-in LED: On pin 13 for easy testing and debugging of basic code.
  • Power Options: Can be powered via USB connection or with an external power supply. The power source is selected automatically.
  • ICSP Header: Allows direct programming of the microcontroller.
  • Easy-to-Use: Ideal for beginners and hobbyists due to its simplicity and wide range of available tutorials and community support.
  • Open-Source Hardware: Allows for modifications and enhancements.



  • Microcontroller: ATmega328P
  • Operating Voltage: 5V
  • Input Voltage (recommended): 7-12V
  • Input Voltage (limit): 6-20V
  • Digital I/O Pins: 14 (of which 6 provide PWM output)
  • Analog Input Pins: 6
  • DC Current per I/O Pin: 20 mA
  • DC Current for 3.3V Pin: 50 mA
  • Flash Memory: 32 KB (ATmega328P) of which 0.5 KB used by bootloader
  • SRAM: 2 KB (ATmega328P)
  • EEPROM: 1 KB (ATmega328P)
  • Clock Speed: 16 MHz
  • USB Connector: Type B
  • USB-to-Serial Converter: CH340
  • Dimensions: 68.6 mm x 53.4 mm


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Uno R3 CH340 Arduino Compatible

Uno R3 CH340 Arduino Compatible

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Regular price ₱ 265.00
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