Skytracker Ardiuno

Hi

I am planning on building an Astronomy Star tracker with Ardiuno. However looking for parts and looking for the most suitable parts:

Hi mwrrc, sounds like a pretty cool project. There are many ways to go about this, and I found this rather comprehensive, https://www.instructables.com/id/Star-Track-Arduino-Powered-Star-Pointer-and-Tracke/

Otherwise, with the parts you need help with, here are some that may be useful: