From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Online tech help
Date: Tue, 21 Jan 2003 14:10:50 GMT
NNTP-Posting-Date: Tue, 21 Jan 2003 06:10:50 PST
> B2431 wrote:
> > Every time I go look on the web for information on how something works or how
> > to use it I wind up going in circles. Is there a single place I can go for help
> > with synchro, r/d, op amp, a/d etc? I'm not looking for an EE course, just a
> > reference.
> > Failing that is there a book I can buy without having to buy an entire library?
> I'd recommend "The art of electronics" by Horowitz and Hill.
> It has most of the above topics, with fairly in-depth info.
> Not synchro, which IIRC is a term for two stepper motors coupled back-back,
> because when one is turned (above a certain speed) the other turns at
> exactly the same speed.
> Pretty rare nowadays, as you can do quite a lot better in most cases with
> a chip, a rotary encoder and a stepper. (Synchros tend to lose a few steps
> when they start and stop.)
Small nit. A synchro is typically used as a rotary position sensor and
was sometimes used to generate error signals in carrier control systems.
In more recent times, they have been used as pure rotary position
sensors. Analog devices and other made (make?) synchro to digital
converters for this purpose. Another well know device for rotary and
linear position sensing that used principles related to those of the
synchro was the Inductosyn(tm). I haven't looked into position sensors
lately but these magnetic devices offered advantages over other types of
position encoders (brush and optical) in that they are more rugged and
capable of being used in relatively harsh environments.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org