- Source code provided, Inventor CAD files provided (student licenced) - excel sheet to calculate the rotation speed table included. Needed if you use other dimension, threads, motor - the stepper driver is powered directly with 5V from the powerbank. The power input pins are not used. - My experience: Polar Finder Scope is not needed, at least for wide angle shots - One Button control: 1. Plug in USB cable 2. 1st Button Press: rotates to initial position and starts tracking 3. Button Press: go back to initial position and continue tracking