Relay Breakout Board for BBC Micro:Bit
Easily control high voltage and current loads with the Relay Board for BBC micro:bit from PMD Way.
This relay board arrives fully-assembled and contains four relays each capable of swiching up to 120V AC or 24V DC at 3A.
You need to connect external power to drive the relay coils to the terminal block labelled P1, and this can fall between 7 and 12V DC. This will also power the micro:bit thanks to the onboard 5V and 3.3V regulators.