“Use two dimmers to draw on your computer screen, just like an Etch-a-SketchTM.
The two dimmers send analog data into the Arduino and output serial data to Processing, a programming language that lets you control visual information on your computer. By moving the dimmers, you control movement on your screen and can draw lines.
littleBits makes an open source library of electronic modules that snap together with magnets for prototyping, learning, and fun. Find out more at littleBits.cc“