This is a library for our Adafruit 16-channel PWM & Servo driver Pick one up today in the adafruit shop! ------> http://www.adafruit.com/products/815 These displays use I2C to communicate, 2 pins are required to interface. For Arduinos, thats SCL -> Analog 5, SDA -> Analog 4 Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada for Adafruit Industries. BSD license, check license.txt for more information All text above must be included in any redistribution To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder Adafruit_PWMServoDriver. Check that the Adafruit_PWMServoDriver folder contains Adafruit_PWMServoDriver.cpp and Adafruit_PWMServoDriver.h Place the Adafruit_PWMServoDriver library folder your /libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.