Arduino

AB Electronics UK stocks a growing range of I2C expansion boards that work just as well with Arduino as they do with Raspberry Pi. Our ADC Pi, IO Pi Plus, Serial Pi Plus, RTC Pi, and Servo Pi boards are all built around industry-standard I2C interface chips, so they connect to any Arduino board with I2C support (Uno, Mega, Nano, Leonardo, and more) using just four wires, SDA, SCL, 5V and GND.

Whether you need extra analogue inputs, more GPIO than your Arduino has to spare, an additional serial port, a hardware real-time clock, or precise servo/PWM control, these boards add professional-grade functionality without the cost or complexity of building it from scratch. Each product page includes wiring diagrams and library examples to get you up and running quickly, and you'll find dedicated Arduino tutorials in our Knowledge Base covering setup, addressing multiple boards on the same I2C bus, and troubleshooting.