micro: Breadboard DFRobot micro: Breadboard is a micro:bit-based expansion board designed for STEM-starter. This expansion board has a 3.23x2.17-inch breadboard on which electronic components can be connected to build circuits. All IO ports of this board are led out in the form of a pin header and female header and require no welding. The DFRobot micro: breadboard features on-board AB buttons, a PWR indicator, an independent power switch, more play methods, and ease of use. This breadboard can be used for building and debugging circuits and micro: bit-based applications like light control lamps, smart doorbells, and temperature alarms.