I still have my old AstroScan, so I’m supporting it for the books.
Here’s an idea I’ll probably never get around to… Since the base is quite spherical, some motor driven friction discs could drive it like an old style computer mouse in reverse. Arduino, GPS module and an SD card with an Ephemeris; aim it at two or three bright stars to calibrate. I don’t know if a scheme like that would be stable enough for long exposure photography, but it could be interesting.
