AstroTrackerHD Prototype 4 in testing, with more pics. (HD =...

AstroTrackerHD Prototype 4 in testing, with more pics. (HD = harmonic drive, which is a high-precision, high-torque, zero backlash gear set. See: https://youtu.be/3mWemlMEzFk). I did some code cleanup and refactoring for version 4.0.7, and added the ability to adjust the speed in small increments and save the speed values to eeprom. https://www.saltwaterwitch.com/blog