![micro:bit RED LED micro:bit RED LED](https://cdn11.bigcommerce.com/s-am5zt8xfow/images/stencil/500x659/products/1622/3926/apizpjl2x__39091.1554992668.jpg?c=2)
A 3V Light Emitting Diode as an additional LED. It uses a high brightness low current LED and includes a current limiting resistor to protect the micro:bit’s output.
The black lead goes on to GND and the green lead goes on to whichever Pin 0, 1 & 2 is being used.
To turn the LED on, use the digital write block, setting it to 1. To turn off, set it to 0.