IO expansion for Microbit: A powerful expansion board that brings 19 PIN pins to the Microbit Board, increasing available input and output options for projects. Onboard buzzer: Includes a passive buzzer on the board, which can be connected via a jumper cap for audible alerts or feedback in your projects. Perpin VCC and GND with voltage selection: Each PIN pin has its own VCC and GND reference. You can switch the VCC for a pin to 3.3V or 5V using a jumper. The board provides 3V3 and 5V options to support flexible and diverse wiring configurations. SDA and SCL with power rails for modules: SDA and SCL pins are provided along with the corresponding 5V and GND pins. This enables connections to modules such as LCD1602 displays for enhanced communication possibilities. Use scenarios Educational projects and rapid prototyping: Extend the Microbit with more I/O pins and an audible buzzer to create interactive learning devices, alarms, or simple signal indicators without redesigning the base board. LCD and I2C module integration: Use the SDA/SCL lines with 5V and GND to connect I2C peripherals such as LCD displays (LCD1602 with an I2C backpack) for displaying data and status information from your Microbit project. Flexible voltagedriven setups: Leverage the 3.3V and 5V VCC options per pin to drive sensors, modules, or actuators that require specific voltage levels, enabling diverse wiring schemes and simpler power management for small projects.