TinkerKit Red Led [10mm] module is a low power light source that is
available in several different colors. It lights up when powered from an Arduino
pin. This module features a 10mm red light emitting diode, the standard
TinkerKit 3pin connector, a green LED that signals that the module is correctly
powered and a tiny yellow LED that shows the current brightness of the red LED.
A resistor provides the optimal amount of current when connected to an Arduino.
Note: This module is an actuator, therefore the connector is an input
that need to be connected to one of the output connectors on the TinkerKit