R3 Plus - Arduino-Compatible ATmega328P Development Board

The R3 Plus is Waveshare's very own Arduino-compatible ATmega328P-based development board. Arduino-compatibles are a great way to find something a little different for your project - ideal when you need a specific feature or function.

Waveshare designed the R3 Plus with a huge number of subtle but useful changes to the default R3 design including dual voltage levels, low-profile power connectors, lateral switches and more - see the full feature list below!

A Micro-USB cable is included with the board.

Features

• Dual voltage levels - Supports 5V and 3.3V
• Lateral reset button - Easier to access when using shields
• Bootloader switch - The board can be configured to run a program immediately when power-up by the switch
• Micro-USB Connector - A more common USB interface and keeps the board low profile for shields
• Low-profile DC jack - Contributes to the low profile of the board, avoids shield blocking
• Power output header - A dedicated 3.3/5V and GND header for your projects and common grounding
• 3.3V Power Output - A boost to the norm, with 800mA driving capability
• Crystal Oscillator - For accurate clock references
• 8 ADC channels - more ADC pins for your project. CFG used as ADC6 by configuration and ADC7 from the reserved pin.
• Solder Pads - Pads are provided for DIY project wiring where required
• FT232 USB Driver - more compatible with mainstream Operating Systems
• Firmware Fixing - Firmware can be fixed by using the onboard FT232, no extra programmer is required
• Dimensions: 66.04mm x 53.34mm

What's Onboard

• 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
• Solder pads provided, supports prototype breadboard
• 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
• 9) FT232 pins
• For burning Bootloader into the microcontroller
• 10) DC input
• 7V ~ 12V
• 11) Reset button
• 12) Power indicator
• 13) Serial port Rx/Tx indicator
• 14) User LED
• 15) 500mA fast auto-recovery fuse
• 16) Power configuration
• For configuring the operating voltage
• 17) 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

Pinout

Package Contents

• 1x R3 Plus
• 1x Micro-USB cable