ADIY UNO R3 Compatible ATMEGA328P CH340K Microcontroller Board

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Product Specification

ADIY Uno R3 CH340K ATmega328p Development Board is the low-cost version of the popular Uno R3 Arduino. It is assembled with the CH340 USB to Serial converter chip, instead of using an Atmega16U2 chip.

We at ADIY have used plenty of these low-cost Arduino boards with CH340 chips, and have found them to work perfectly. The only time the CH340 chip is used is during programming and when using the serial output of the USB port. This board is identical to the more expensive version without a CH340 chip during normal operation.


Main changes from the older version:

  • Two rows of holes for the pins (Male and Female). So it can be connected with normal Female Jumpers.
  • Additional 3 rows of the holes for wiring.
  • Changes to the DIP package of ATMEGA328P to flat package.
  • CH340k replace ATmega16U2
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Product Details

ADIY UNO R3 COMPATIBLE ATMEGA328P CH340K MICROCONTROLLER BOARD has all of the features of the original Arduino Uno with the added benefit of an ISP header and CH340K USB interface.The ADIY UNO R3 can be programmed over a USB B cable using the Arduino IDE: Just plug in the board, select "Arduino UNO" from the board menu and you are ready to upload sketches.You can power the ADIY UNO R3 Board over USB or through the barrel jack. The on-board power regulator can handle any input voltage on the barrel jack from 7 to 15 Vdc.

How to use:

1. Download the IDE Arduino

Link: http://arduino.cc/en/Main/Software (Copy to open)

2. Download the USB chip driver

Link: http://www.5v.ru/zip/ch341ser.zip (Copy to open)

3. Plug in UNO development board, the driver will be installed automatically

4. Select the UNO from the die

5. Select the COM port

6. The best choice first, Arduino comes with routine procedures, burn into it.


Model Type - ADIY Uno R3

Microcontroller Chip - ATmega328 (SMD) – Interface CH340K

Operating Voltage - 5 V

Input Voltage(Recommended) - 7-12V

Input Voltage (limit) - 6-20V

Analog I/O Pins - 6

Digital I/O Pins - 14 (of which 6 provide PWM output)

PWM Digital I/O Pins - 6

DC Current for 3.3V Pin - 50 mA

DC Current per I/O Pin - 40 mA

Clock Speed - 16 MHz

SRAM - 2 KB (ATmega328)

EEPROM - 1 KB (ATmega328)

Flash Memory - 32 KB (ATmega328) of which 0.5 KB used by bootloader

Power Supply Option - DC Jack or USB

On Board LEDs - On/Off, L (PIN 13), TX, RX

Operating Temperature (°C) - -40 to +90

Dimensions in mm (LxWxH) - 75 x 54 x 12

Weight (gm) - 26



1 x ADIY R3 CH340K ATmega328p Development Board Compatible with Arduino