One of my first projects using Arduino happened during the Christmas season, so seemed a good idea to create Christmas lights to illuminate and brighten the house. The first step is to gather the necessary hardware: 1 x Arduino, I used the Arduino 2009; 2 x breadboard, should be enough to perform the tests; 1 x switch button, it will be used to switch between the diferrent lightning effects; 8 x red LEDs 8 x green LEDs 8 x yellow …