Vixen AXD2 Super Pro Telescope Set / Vixen Telescopes / Telescopes - ProAstro/Kochphoto AG
RIGEL Systems Stepper Motor, USB nStep Focus Controller, free temperature sensor and Installation Kit for the Newtonian version of the Baader Steeltrack focuser (model 2957030)
Open Source Telescope Controller Puts Smart Features In Old Telescopes | Hackaday
DIY GoTo Telescope Mount [3] = Electronics for first Stepper Test | Jake's Blog
Control Your Telescope Using Stellarium & Arduino : 12 Steps (with Pictures) - Instructables