• Five pins (connector rings):
• Pins 0, 1, and 2 are for connecting input and output devices
(including ones you build yourself)
• Pin 3V (3 volts) sends power to an external device, like a
motor
• Pin GND is a ground (for completing a circuit)
• Sockets for plugging in:
• a microUSB cable for uploading and downloading
information to your computer
• a connector for a battery pack (usually two AA batteries or a
3V coin battery)
• Bluetooth for sending signals and code back and forth with
another micro:bit or other Bluetooth-enabled device
• A 25-pin edge connector that lets you expand what the board can
do (using add-on breakout boards that ...