DFRduino UNO R3 with IO Expansion Shield and USB Cable A-B

The DFRduino UNO R3 bundle is a physical computing platform featuring an Arduino-compatible microcontroller board, a Gravity IO Expansion Shield, and a USB A-B cable. It is tailored for students, educators, and hobbyists building interactive electronics and robotics projects.

Complete hardware bundle

This pack includes a DFRduino Uno V3.0 board, a Gravity IO Expansion Shield V7.1, and a USB A-B cable. It provides all essential hardware to connect to a computer and begin interfacing with sensors and actuators.

Removable DIP package chip

The board features a socketed ATmega328 DIP microcontroller alongside an ATmega16U2 USB-to-serial converter. The DIP chip can be removed for firmware updates, external programming, or integration into standalone, permanent circuits.

Colour-coded pin headers

Header pins are colour-coded into red for power, blue for analogue I/O, and green for digital I/O. This scheme matches standard sensor cables to make pin identification straightforward and prevent incorrect wiring.

Full Arduino compatibility

The board is fully compatible with the standard Arduino IDE across Windows, Mac OS X, and Linux platforms. It includes standard R3 additions such as dedicated SDA and SCL pins, plus an IOREF pin that allows expansion shields to match operating voltages.

Microcontroller specifications and connectivity

Operating at 5V with a 16 MHz clock, the ATmega328 provides 32 KB of flash memory, 2 KB of SRAM, and 1 KB of EEPROM. It offers 14 digital I/O pins (including 6 PWM outputs) and 6 analogue inputs, powered via USB, battery, or external 7 to 12V DC input.