Re: [CAD_CAM_EDM_DRO] Re: need axis design idea

juan gelt wrote:

> the circuit schematic i posted converts quadrature to
> '4 times the pulses!!' with a couple 10 cent chips any
> high school kid can look up and make perfect sense of,
> pull and replace, duplicate at will for anything else
> he wants....
> that's one way to get the result.
> another way is to dedicate a microprocessor with a
> quarter million gates or so to do the work of 8 gates.
> this means you need to know how to program a pic- and
> yu need a programmer for it. so it requires additional
> infrastructure and study to be able to replace 8 gates
> with 250,000. however, once yu Have accomplished that,
> you now have a device that costs more and that a
> normal user can not understand, repair or replace.
> Tada!

As Graham says. A Chinese scale produces a 48 bit data package with
20,480 counts per inch, with two lots of 24 bit data, transmitted about
50 times a second. Not something that is easy to reproduce with a few gates?

--
Lester Caine - G8HFL
-----------------------------
L.S.Caine Electronic Services
Treasurer - Firebird Foundation Inc.