ATMEGA328P Microcontroller Development Board, Arduino-Compatible

$14.99 - $64.99
IO Expansion + Sensors

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ATMEGA328P microcontroller development board, Arduino-compatible
R3 PLUS MCU development board

based on ATMEGA328P-AU

Compatible with the Arduino official R3 board
What's the differences
R3 PLUS Official R3 Remarks
Operating voltage 5V/3.3V 5V Dual voltage level to support more shields
Reset Lateral Vertical Lateral button is easier to use when connecting with shield
Bootloader switch Yes None The board can be configured to run program immediately when power-up by the switch
USB connector Micro USB USB Type B Micro connector is more commonly used, and shields won't be blocked anymore while connecting
DC jack Low profile Normal height Shields won't be blocked anymore while connecting
Power output header Yes None

Providing 5V/3.3V power output OR common-grounding with other boards

3.3V power output 800mA Max 150mA Max R3 PLUS features higher driving capability
Oscillator Crystal oscillator Ceramic resonator Crystal oscillator is suit for applications where accurate clock reference is required
ADC channel 8 6 CFG used as ADC6 by configuration, and ADC7 from the Reserved PIN
USB driver Compatible with all main systems Doesn't compatible with WIN7/WIN8 Express Edition Driver will never failed to install thanks to the onboard FT232
Firmware fixing Supported Not supported Firmware can be fixed by using the onboard FT232, no extra programmer is needed
Connecting with Waveshare Shields

Connecting with Motor Control Shield and IO Expansion Shield

Connecting with Sorts of Sensors

What's On Board
  1. ATMEGA328P-AU
  2. AMS1117-3.3
    3.3V voltage regulator
  3. NCP1117ST50T3G
    5V voltage regulator
  4. FT232RL
    USB to UART convertor
  5. Arduino interface
    compatible with standard Arduino interface with two additional analog inputs A6 (config the CFG), A7
  6. ICSP interface
  7. MICRO USB connector
    for uploading program OR serial port debugging
  8. Power output header
    3.3V OR 5V, voltage level configured by the onboard power configuration switch, used as power output OR common-grounding with other boards
  1. FT232 pins
    for burning Bootloader into the microcontroller
  2. DC input
    7V ~ 12V
  3. Reset button
  4. Power indicator
  5. Serial port Rx/Tx indicator
  6. User LED
  7. 500mA fast auto-recovery fuse
  8. Power configuration
    for configuring the operating voltage
  9. Bootloader selection switch
    • turn ON: the board will reset when power-up OR other USB devices were detected connecting to the PC
    • turn OFF: the onboard program runs immediately when power-up, and the board will not reset when other USB devices were detected connecting to the PC
Optional development kit

development kit is also available for your convenience

Pinout definition
Outline dimensions
Resources & Services
Wiki: R3_PLUS

Quick Overview

  1. R3-PLUS x1
  2. USB-A to micro-B cable x1
  3. OPTIONS IO Expansion Shield x1
  4. OPTIONS Sensors Pack x1