Uno ATmega328P SMD Development Board CH340 (Arduino-Compatible)

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$14.95 ea

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  • Jameco Part no.: 2297727
  • Manufacturer: Major Brands
  • Manufacturer no.: UNO R3 SMD CH340
  • HTS code: 8537109060
  • Web Exclusive
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Arduino-Compatible Uno ATmega328P SMD Development Board CH340

Surface Mount Edition

The Arduino UNO R3 CH340 is a clone of the standard UNO R3, but avoids FTDI costs with a CH340 USB driver (affordable, reliable and Maker-friendly). This UNO uses the CH340 USB Serial chip and requires downloading of the Windows Drivers or Mac OS Drivers depending on the operating system that you use.

This Arduino UNO R3 CH340 is a clone of the original Arduino UNO R3, but has been modified to bypass the standard (expensive) FTDI drivers with the CH340 USB serial chip. By doing so, it not only makes this type of prototyping and development more accessible to students and hobbyists, but it also encourages the open-source Maker movement.

In terms of upgrades since previous versions of the Arduino UNO, the Arduino UNO R3 CH340 offers a variety of major upgrades that improve the power and efficiency of the board but also a few minor quality-of-life upgrades. These include the addition of solder pads from pins PB4 through PB7 to the USB header, ICSP header pins rather than simple solder pads, and a 10-pin connector for the I2C, AD4/SDA and AD5/SCL. These seemingly insignificant improvements have made the Arduino-compatible UNO R3 much easier and simpler to utilize, making it an obvious upgrade from the original versions.

The official Arduino Uno R3 DIP Edition and official Arduino Uno R3 SMD Edition are also available.


  • Microcontroller: ATmega328
  • Operating Voltage: 5V
  • Input Voltage (recommended): 7-12V
  • Input Voltage (limits): 6-20V
  • Digital I/O Pins: 14 (of which 6 provide PWM output)
  • Analog Input Pins: 6
  • DC Current per I/O Pin: 40 mA
  • DC Current for 3.3V Pin: 50 mA
  • Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
  • SRAM: 2 KB (ATmega328)
  • EEPROM: 1 KB (ATmega328)
  • Clock Speed: 16 MHz

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