DragonTail for micro:bit Adafruit DragonTail for micro:bit is a breakout board designed with a card-edge connector for the micro:bit learning board and can be plugged into any solderless breadboard. The BBC micro:bit is an all-in-one learning board equipped with sensors, LEDs, PCB card-edge connector, and built-in BLUETOOTH® LE radio. The DragonTail breakout board does not require soldering as it comes fully assembled and features two pads for the power railing.