Before we describe the system in detail, we will describe an
example that highlights Amarino’s most important features.
Figure 1 shows a picture of this project—an RGB LED lamp
(similar to the Ambient Orb [1]) that can be controlled by a smart
phone. To change the color of the lamp, the phone is placed on a
flat surface and rotated—the lamp’s color changes in response to
changes in the phone’s compass heading.