Quadrature decoder
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From: GregS on 1 Jun 2010 12:52 Been searching all morning for one, and did find one by LSI/ LS7184. I have been looking at a drawing of one from the mid 70's, drawn up by a coworker who is long gone. using 74121;'s and 7400. I got a sample request, but I think i can do this myself quickly. I got stepper motors and controllers requiring step and direction input. Good thing I have this diagram because I can't find others. Must be some other stuff around ?? I don't need indexing or counters. I also see optical encoders that have the outputs I need for the controllers. But I need something fast. greg
From: langwadt on 1 Jun 2010 13:36 On 1 Jun., 18:52, zekfr...(a)zekfrivolous.com (GregS) wrote: > Been searching all morning for one, and did find one by LSI/ LS7184. > > I have been looking at a drawing of one from the mid 70's, drawn up by > a coworker who is long gone. > using 74121;'s and 7400. > > I got a sample request, but I think i can do this myself quickly. I got stepper motors > and controllers requiring step and direction input. > Good thing I have this diagram because I can't find others. > Must be some other stuff around ?? > > I don't need indexing or counters. > I also see optical encoders that have the outputs I need for the controllers. > But I need something fast. > > greg http://groups.google.dk/group/sci.electronics.design/msg/8b9bba503375d924?hl=da&dmode=source -Lasse
From: Jim Thompson on 1 Jun 2010 14:34 On Tue, 01 Jun 2010 16:52:32 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >Been searching all morning for one, and did find one by LSI/ LS7184. > >I have been looking at a drawing of one from the mid 70's, drawn up by >a coworker who is long gone. >using 74121;'s and 7400. > >I got a sample request, but I think i can do this myself quickly. I got stepper motors >and controllers requiring step and direction input. >Good thing I have this diagram because I can't find others. >Must be some other stuff around ?? > >I don't need indexing or counters. >I also see optical encoders that have the outputs I need for the controllers. >But I need something fast. > >greg Work statement too vague :-) What _exactly_ are you looking for? A _detector_ that produces a pulse train _and_ direction? ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | The only thing bipartisan in this country is hypocrisy
From: GregS on 1 Jun 2010 14:45 In article <736576ab-a9eb-4a5c-a129-9bab0b07096a(a)y21g2000vba.googlegroups.com>, "langwadt(a)fonz.dk" <langwadt(a)fonz.dk> wrote: >On 1 Jun., 18:52, zekfr...(a)zekfrivolous.com (GregS) wrote: >> Been searching all morning for one, and did find one by LSI/ LS7184. >> >> I have been looking at a drawing of one from the mid 70's, drawn up by >> a coworker who is long gone. >> using =A074121;'s and 7400. >> >> I got a sample request, but I think i can do this myself quickly. I got s= >tepper motors >> and controllers requiring step and direction input. >> Good thing I have this diagram because I can't find others. >> Must be some other stuff around ?? >> >> I don't need indexing or counters. >> I also see optical encoders that have the outputs I need for the controll= >ers. >> But I need something fast. >> >> greg > >http://groups.google.dk/group/sci.electronics.design/msg/8b9bba503375d924?h= >l=3Dda&dmode=3Dsource > I was snooping around Google Groups. Thanks. I'll look over the diagram. Here is what i have been looking at...... http://zekfrivolous.com/misc/quadrature.pdf greg
From: GregS on 1 Jun 2010 14:46
In article <khka065j6tthlvak56n4c9pfchpkn83k0t(a)4ax.com>, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >On Tue, 01 Jun 2010 16:52:32 GMT, zekfrivo(a)zekfrivolous.com (GregS) >wrote: > >>Been searching all morning for one, and did find one by LSI/ LS7184. >> >>I have been looking at a drawing of one from the mid 70's, drawn up by >>a coworker who is long gone. >>using 74121;'s and 7400. >> >>I got a sample request, but I think i can do this myself quickly. I got > stepper motors >>and controllers requiring step and direction input. >>Good thing I have this diagram because I can't find others. >>Must be some other stuff around ?? >> >>I don't need indexing or counters. >>I also see optical encoders that have the outputs I need for the controllers. >>But I need something fast. >> >>greg > >Work statement too vague :-) > >What _exactly_ are you looking for? A _detector_ that produces a >pulse train _and_ direction? > > ...Jim Thompson Right, pulse and direction. greg |