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Home / Development Boards & Control Boards / R3 UNO Development Board with CH340, ATmega328P Microcontroller Expansion Board, Arduino Compatible

Attributes

Brand -
Category Electronic Components / Maker DIY / Development Boards & Control Boards
Origin -
Microcontroller ATmega328P
USB Interface Chip CH340
Operating Voltage 5V
Input Voltage (Recommended) 7-12V
Digital I/O Pins 14
PWM Pins 6
Analog Input Pins 6
Flash Memory 32 KB
SRAM 2 KB
Clock Speed 16 MHz

5 reviews

A

Anonymous

Mar 21, 2026

Rating: 5/5

Compatible with all my shields

I tested this with several motor driver shields and sensor modules. The pin spacing is standard and everything fit perfectly. Highly recommended.

A

Anonymous

Mar 03, 2026

Rating: 3/5

Works but headers not soldered

The board functions correctly, but I was surprised that the pin headers were not pre-soldered. I had to do that myself before using it.

A

Anonymous

Feb 05, 2026

Rating: 4/5

Good board, driver installation needed

The hardware is solid, but make sure you install the CH340 drivers before connecting it to your computer. Once that was done, it worked flawlessly.

A

Anonymous

Feb 05, 2026

Rating: 5/5

Perfect for learning electronics

This board works exactly like the original Arduino UNO. I used it for a school project and had no issues uploading sketches. Great value for the price.

A

Anonymous

Jan 18, 2026

Rating: 5/5

Fast delivery and well packaged

Arrived quickly and was protected well in anti-static packaging. The board looks clean and the soldering quality is good.

5 FAQ

Q: Can I power this with a 9V battery?

A: Yes, you can power the board using a 9V battery connected to the barrel jack or the VIN pin.

Q: Are the logic levels 3.3V or 5V?

A: The I/O pins operate at 5V logic levels. Please be cautious when connecting 3.3V sensors without a level shifter.

Q: What type of USB cable do I need?

A: You will need a standard USB Type-A to Type-B cable, commonly used for printers and older scanners.

Q: Does it work on macOS?

A: Yes, it works on macOS. However, you might need to install specific drivers for the CH340 chip depending on your OS version.

Q: Is this compatible with the Arduino IDE?

A: Yes, this board is fully compatible with the Arduino IDE. You may need to select the appropriate board type and install CH340 drivers.

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