Results 1 to 5 of 5

Thread: Maximum sensor cable length?

  1. #1
    rdhatt Guest

    Maximum sensor cable length?

    I would like to place sensors within my house and connect them to my computer, but some of my target locations are pretty far, e.g. 40ft or so. Can I string a couple of the 12ft cables together or is it too far?

  2. #2
    Join Date
    Sep 2006
    Location
    Carol Stream, Illinois
    Posts
    1,695
    Images
    118
    Rep Power
    106

    Re: Maximum sensor cable length?

    It depends... are you talking about stringing the USB cables together or the analog cables? USB cables are limited to about 15ft. If you want to go beyond that, you'll need something like a USB to RJ45 Extender.

    However, we've seen the analog cables up to 100ft in length. Keep in mind though that the longer the analog cable, the more degraded the signal becomes.
    Last edited by Alex; 11-27-2007 at 04:21 PM.

    �In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed�
    - Charles Darwin

  3. #3
    Join Date
    May 2008
    Location
    TN
    Posts
    853
    Images
    99
    Rep Power
    71

    Re: Maximum sensor cable length?

    Define inconsistent. Are they varying by orders of magnitude or are they +-1?
    "If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut."
    -
    Einstein

    Don't be a HelpVampire

  4. #4

    Re: Maximum sensor cable length?

    Aren't I2C cables limited to a foot? That said I had a Devantech compass on a mast with over a foot and a half cable still working, but think that was pushing a bit.

  5. #5
    Join Date
    Apr 2008
    Location
    Sacramento, CA, USA Area
    Posts
    5,341
    Rep Power
    174

    Re: Maximum sensor cable length?

    The max length and # of devices is regulated by the max bus capacitance (400pF as memory serves) - the more devices you add, the shorter the length. Ditto using different gauges, shielding, and routing of wire. Dropping the speed can improve that.

    Ultimately, repeaters can be used to carry I2C for miles.
    I Void Warranties�

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Kondo web page translated.
    By Droid Works in forum Humanoids, Walkers & Crawlers
    Replies: 4
    Last Post: 10-06-2007, 05:49 PM
  2. Servo Wire Length
    By pottsbgstv in forum DYNAMIXEL & Robot Actuators
    Replies: 2
    Last Post: 08-01-2007, 04:59 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •