Library for the SparkFun ProDriver - Stepper Motor Driver (TC78H670FTG). An Arduino Library for the <a href="https://www.sparkfun.com/products/16836">SparkFun ProDriver - Stepper Motor Driver (TC78H670FTG)</a>. This makes driving a bi-polar stepper motor easy, and it has many examples to show you some of the cool features of the IC (including both Clock-in and Serial modes).