electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
Live streaming at radio.electro-music.com

  host / artist show at your time
  Muied Lumens Frequencies
Please visit the chat
 Forum index » DIY Hardware and Software » Developers' Corner
Using ethernet for short distance patching?
Post new topic   Reply to topic Moderators: DrJustice
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
Top Top



Joined: Feb 02, 2010
Posts: 232
Location: California

PostPosted: Wed Aug 29, 2018 2:05 pm    Post subject: Using ethernet for short distance patching?
Subject description: Can each wire in twisted pairs be used as individual conductors for short runs? Crosstalk problems?
Reply with quote  Mark this post and the followings unread

I am working on a device from which I would like to be able to break out power and a few streams of pulses from the main "brain."

The circuits sending and receiving the pulses are CMOS logic at 12V.

I need seven simple pulse streams (one at audio rate and six at sub-audio rates), a ground, and a power supply (12v low amperage).

Cat 5e or cat 6 seemed good to me because it is a compact connector, with eight signal lines and a shield, cables are ubiquitous, and the connectors are cheap.

One thing about the ethernet architecture, however, is that it is designed to transfer four streams of data in inverted pairs, and those inverted pairs are physically sent down a twisted pair of wires (eight conductors total).

If I were to run short distances, say 3ft max, do you think there would be significant enough inductive cross-talk between the conductors to cause errors in the streams? Somehow I doubt it would be that significant, but the cable is basically designed, as I understand, to have interference between the twisted strands.

_________________
A. MAGIC PULSEWAVE ELECTRONICS
Back to top
View user's profile Send private message
Grumble



Joined: Nov 23, 2015
Posts: 756
Location: Netherlands
Audio files: 23

PostPosted: Wed Aug 29, 2018 2:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

As long as you have low(ish) impedances on each side, I can’t imagine any problems.
_________________
my synth
Back to top
View user's profile Send private message Visit poster's website
Top Top



Joined: Feb 02, 2010
Posts: 232
Location: California

PostPosted: Wed Aug 29, 2018 3:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

It looks like I would actually have to use cat6a if I wanted to include 8 signals + ground. I didn't realize that a lot of those cat 5/6 connections don't have a grounded shield.
_________________
A. MAGIC PULSEWAVE ELECTRONICS
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: DrJustice
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Developers' Corner
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use