The Expansion Board is a robust Bit accessory that connects to the 19 pins of the Bit board and expands its I O capabilities for a wide range of projects. Key benefits Easy power and signal access: Each Pin provides access to the corresponding Vcc and GND, enabling straightforward power and ground reference for connected components. Flexible voltage options: Allows switching between 3.3V and 5V for each pin, with three independently selectable 3.3V/5V pins for versatile wiring. Broad compatibility: Designed to pair with the Bit board family, using the standard 19pin interface to extend functionality. Practical and compact: Compact form factor and a reliable PCB design provide a convenient expansion solution for desks, classrooms, and labs. Durable and dependable: Built to support repeated connections in classroom, maker space, and lab environments without sacrificing performance. What you get A compact expansion board that attaches to the Bit board's 19pin header, expanding available I O and power options for your projects. Specifications and features (as supported by the product) Function: Extends Bit board I O with accessible pins and configurable 3.3V/5V power rails Compatibility: 19pin interface designed for the Bit board family Voltage handling: Independent 3.3V or 5V options for multiple pins Layout: Three independently selectable 3.3V/5V pins for flexible wiring Construction: Standard PCB with reliable connectors suitable for classroom and workshop use Use scenarios Classroom demonstrations: Run lightweight sensors, LEDs, and actuators to illustrate programming and electronics concepts with a single, clean expansion solution. Home automation prototypes: Interface input sensors and control devices that require common ground and a choice of 3.3V or 5V operation. Maker and robotics projects: Extend I O for tiny robots, interactive displays, and projects that benefit from easily switched voltage rails and multiple breadboardfriendly pins. Audience Students and educators seeking handson learning experiences Makers building prototypes and demonstrations Programming enthusiasts implementing hardware projects with the Bit board Notes Designed to support a range of educational and hobbyist projects with clear access to power and signal lines Keeps a professional, straightforward tone focused on reliability and practical utility without unnecessary embellishment