[time-nuts] 60Hz More or Less
Hal Murray
hmurray at megapathdsl.net
Mon Apr 2 07:19:09 UTC 2012
robert8rpi at yahoo.co.uk said:
> Have a look in "The Art of Electronics" by Horrowitz & Hill (if you don't
> hav a copy, you should! or try the local libary). It has a nice circuit for
> this (Actually a telescope drive IIRC) type of application.
Rats. I can't find my copy.
I think the trick is that it needs to drive it at sidereal time so it's off a
bit from 60 Hz. I forget what they start with.
What do serious (optical) telescopes use for a time base? What did Hubble
use? What did they use for the Palomar Sky Survey?
--
These are my opinions, not necessarily my employer's. I hate spam.
More information about the time-nuts
mailing list