The Expansion Board is a powerful Bit accessory that connects to the 19 pins on the Bit board, expanding its functionality for your projects. Key benefits Increases I/O capabilities by attaching directly to the Bit board's 19pin interface, enabling more flexible wiring and peripheral connections. Supports I2C communication, enabling easy integration with I2C LCD displays, sensors, and other I2C devices. Onboard passive buzzer provides audible feedback without extra components, useful for alerts, status signals, and simple demonstrations. Each pin includes a dedicated VCC and GND, with three independently selectable pins that can be set to 3.3V or 5V, allowing safe and compatible connections for a range of sensors and modules. Compact form factor and straightforward wiring simplify prototyping, education projects, and handson learning. Who should consider this expansion board Students and educators seeking a simple, reliable way to expand the Bit board's I/O and experiment with I2C devices and peripherals. Makers and programming enthusiasts looking to accelerate prototyping with a readytowire interface and flexible voltage options. Projects that require audible feedback (buzzer) and easy LCD or peripheral connections without complex wiring. Key specifications and features 19pin interface compatibility with the Bit board for straightforward plugin use. I2C compatibility for connecting LCD displays and other I2C devices. Onboard passive buzzer for simple audible signaling. Each pin provides a VCC and GND; three pins can be independently set to either 3.3V or 5V. Flexible wiring options enabled by selectable voltage levels across multiple pins. Designed for reliable operation in educational and hobbyist environments with a compact, easytouse layout. Practical use scenarios Classroom demonstration: Connect an I2C LCD display to the Bit board via the expansion board to teach basic I2C communication, display data, and observe realtime output. Use the buzzer to provide audible confirmation of successful data transfer or errors. Home projects and prototyping: Build a small dashboard that reads sensor data (temperature, humidity, etc.) over I2C and displays it on an LCD, while using the 3.3V/5V select pins to match sensor voltage requirements and the buzzer for alert signals. Rapid hardware prototyping: Integrate multiple peripherals (sensors, displays, buzzers) on a single board with clean wiring, leveraging the independent 3.3V/5V pins to accommodate devices with different voltage needs and reduce the risk of overvoltage. Notes Uses the Bit board's 19pin interface for compatibility and ease of use. Provides a straightforward path to expand I/O, add peripherals, and prototype projects without extensive wiring or voltagelevel concerns.