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Ah Yes!
Electronic setting circles. Just think all the real astronomy ground work, algorithms, theories etc were all done with calibrated mechanical setting circles on telescopes that were sited and set up without the benefit of GPS or any other of the modern devices that "We just can't do without these days"
Incidently I went through the stepper motor business 20 years ago on my 8" Dobsonian. They are no good for fast slews. but I did manage to write a program in Basic to drive them, complete with a two star alignment routine.
Stepper motors were salvaged from old NFM hard drives. I found one type that would do 3000 steps/second
I just got it to work and along came my LX200 classic. The project is still sitting in a closet somewhere.
Barry
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