Weekend Projects - Android-Arduino LED Strip Lights
Complete instructions for this episode of Weekend Projects can be found at http://makezine.com/projects/android-arduino-led-strip-lights/
Control a strip of full-color LEDs using your Android's touchscreen. Using an Android device that is compatible with USB Host Mode, you can both power and communicate with the Arduino. Build a simple driver circiut on a breadboard (no soldering required) to amplify the Arduino's output pins to provide the necessary current to the LEDs, and create your own light show!"