How to use Adafruit PCA9685 PWM Servo Driver library and how to use It’s functions.How to install Adafruit PCA9685 PWM Servo Driver library to Arduino IDE.I will show you how to install the library to Arduino IDE and make an example project with the library, throughout this tutorial while giving information servo motors and their working principle. This is a tutorial of an open source Arduino library, which lets you use multiple (up to 16) servo motors with your Arduino so that you can make high count servo required projects.