What is the LittleBits Arduino Module? The LittleBits Arduino Module is a microcontroller-based module compatible with the Arduino IDE. It acts as the “brain” of your circuit, letting you write code to control your LittleBits components. Key Features: Three I/O Pins : Two analog (A0 and A1) and three digital (D5, D9, D10) pins for connecting sensors and output modules. Plug-and-Play : Seamlessly snaps into your LittleBits circuit. Powered by USB or 9V Battery : Flexible power options for different projects. Programmable : Works with the Arduino IDE, a user-friendly platform for coding and uploading sketches.