The LED segments of the display require current-limiting resistors when powered from a 5 V logic pin. The value of the resistor is typically between 330 and 470 ohms. ... Next is the Hookup diagram of ...

Accent Your Stairs with Cheap LED Strips and an Arduino. Thorin Klosowski. April 16, 2012 ... The strips are mounted to the stairs and the colors are controlled by an Arduino.