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
