Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: USB extenders for projector?

  1. #1
    Join Date
    Jul 2007
    Location
    Knoxville, TN & Huntsville, AL, USA
    Posts
    3,108

    Default USB extenders for projector?

    I am seriously considering installing my FB3 inside the housing on my first projector. If I do, I was thinking about using 2 or 3 of these to connect the FB3 USB port to my laptop:

    http://www.usbgear.com/computer_cabl...02%2C120%2C137

    Any one familiar with these (or similar) devices that would be willing to comment on their suitabilty for connecting the FB3 to a laptop?

    Thanks!
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

  2. #2
    Join Date
    Oct 2006
    Location
    Central Florida
    Posts
    7,067

    Lightbulb

    I heard that USB cables were not sheilded and can pick up noise if they are over 6 feet...
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

  3. #3
    Join Date
    Apr 2007
    Location
    The Netherlands
    Posts
    178

    Default

    I did use other USB extenders up to 30meter.
    It works, but I stopped using it because of sability.
    Now I use good quality ILDA cable up to 100meter.
    Don't have a FB3, so can't thell if that will work.

  4. #4
    Join Date
    Jul 2005
    Location
    Lancashire UK
    Posts
    1,372

    Default

    I have used USB extenders that have a USB port that connects using CAT 5 ethernet cable, and will extend for 100 ft , i was told that if you use Cat5 cable that has screened pairs you can double that distance.

    but the cheap ones i have seen are only USB 1 not USB 2

    but i guess that should be ok for FB3


    all the best ... Karl
    Last edited by Banthai; 09-28-2007 at 07:21.

  5. #5
    Join Date
    Jun 2007
    Location
    northern maine.
    Posts
    329

    Default

    you could go wireless.
    we have the pc with the laser with a short cable and go wireless from the laptop to the pc.

  6. #6
    Join Date
    Jan 2007
    Location
    Cupertino, California
    Posts
    2,130

    Default

    That's what I have now, there is about a 1 second delay when I click the "Blackout" button though....
    CLICKY!!!

    Admin: In the immortal words of Captain Planet: YOU HAVE THE POWER
    Admin: (To quit being a bitch)

  7. #7
    Join Date
    Jun 2007
    Location
    northern maine.
    Posts
    329

    Default

    i'll ask keith what,exactly,we are using.
    it's very fast.
    he's a busy guy,and i don't see him except at our shows,but i'll email him and get info to you.
    peace,
    wes

  8. #8
    Join Date
    Jun 2007
    Location
    northern maine.
    Posts
    329

    Default

    o.k,this means nothing to me but keith tells me this is what we use for our wireless.

    802.11G with terminal services.
    i remember buying a new antena/(router?) too.

  9. #9
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,693

    Default

    Quote Originally Posted by Laser Ben View Post
    That's what I have now, there is about a 1 second delay when I click the "Blackout" button though....
    You should really be running a separate shutter control, regardless of how you are controlling your laser...
    KVANT Australian projector sales
    https://www.facebook.com/kvantaus/

    Lasershowparts- Laser Parts at great prices
    https://www.facebook.com/lasershowparts/

  10. #10
    Join Date
    Jul 2007
    Location
    Knoxville, TN & Huntsville, AL, USA
    Posts
    3,108

    Default

    Hey everyone -

    Since I started this thread, I thought I would share some additional info I just found out concerning the use of USB extenders with the Pangolin FB3. This comes from Ante Uglesic, a Pangolin associate in Europe who has done considerable research into the subject. Given the potential hazards of our hobby / business, I thought this info would be good to know for ANY brand of laser controller that would be connected to the computer via USB. Here's his reply:
    ************************************************** *
    Flashback is able to operate at either full or hi speed, but hi speed is
    recommended.
    However, when we are talking about extenders, there is a lot of crap
    outthere, on the market, and you can't tell if it will work or not, until
    you test it. You also must know that even though, these guys often claim, it
    will work with 30, 50 or even 100m of CAT5 cable, this is not really the
    case. Some of these extenders have absolutely no data integrity checking,
    which might be ok for a mouse, but certainly not for a laser projector.
    Also, most of these extenders do not compensate for a round-trip delay, and
    would sometimes cause timeouts, that would in turn cause a connection loss.
    In addition, these products are unable to support the full complement of USB
    hubs because they consume the delay budget that is allocated to each hub in
    a chain. So, at the bottom line, these extenders might work or not, and,
    even worse, they might sometimes work, and sometimes not. The only safe
    solution to extend the USB is using USB hubs. Since each USB hub can drive
    5m of cable, you can chain several USB hubs, in order to extend the USB line
    even further. However, this can't go unlimited. I think that USB standard
    allows maximum 5 USB hubs in a chain. You might find a, so called 'active
    extender', which is essentially just a simple USB hub with only one host
    port. This is ok, but no better than just any other USB hub, but sometimes
    they sell it for far more money than ordinary hubs. Also, there are certain
    devices, called 'USB over IP', which might look nice, but they might not
    work ok with Flashback under all circumstances. When Flashback works in so
    called 'direct feed' mode (e.g. during editing the frame), it needs a lot of
    bandwidth, which these devices cannot offer, due to heavy overhead within
    protocol translation. It will essentially work, but every while, the
    Flashback will run out of data, and close the shutter, for a while, and than
    proceed, and so on.

    Well, this is pretty much the story about the USB extenders.

    Hope you will find the suitable solution that will work for you.

    Note that, if you really have to use a simple extender, I would suggest you
    to never come even near to its specified maximum cable length. I would say,
    half of the specified length is something, you should never exceed.

    Ante Uglesic
    Pangolin Team
    ************************************************** *

    I'm convinced! It sounds like you need to keep the USB controllers within a single extension length to be on the safe side. Beyond that, it sounds like a remote connection to the computer itself would be the way to go, as others have already suggested.

    Thanks to all who chimed in on this!

    Randy
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

Posting Permissions

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