BBC micro:bit Evaluation Board
Designed as an educational bare-board micro controller, Pimoroni presents an open development system with debugging enabled for advanced users
Supplied by Pimoroni, the micro:bit is designed around the Nordic Semiconductor nRF51822 Bluetooth LE microcontroller. The board includes an accelerometer, magnetometer / compass, two user configurable buttons, and a 5x5 LED matrix that can also serve as a light sensor. The micro:bit measures 4 cm by 5 cm, is available in a range of colors, and is designed to be fun and easy to use. The bottom of the board has a card-edge style connector with five large contacts for expansion via alligator clips and additional contacts provide a total of 19 GPIO.