2x40 Right Angle Edge Connector for micro:bit Adafruit 2x40 Right Angle Edge Connector for micro:bit fits directly to the edge contacts of a BBC micro:bit and has 80 pins. Some of the micro:bit contacts map to more than one pin because of the different widths of the micro:bit edge contacts. The back half of the pins are not used and the edge connector gives access to all important bottom edge pins of the micro:bit. This connector is best used with a custom PCB.