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  1. #1

    Projector question

    I am usure if anyone would be able to help with this here, but does anyone know what would be the most common connection from laptop computer to a projector, rs232, usb, svideo, coax? The situation is we are installing a projector and need to run the cable in wall and want to use the most common connector on the wall plate, and from what I have been used to it would be rs232 but is there another direction that is being taken that would make this unusable or less common in the near future. I am assuming that the USB is becoming more prevalent but it would have to run 70 feet so that wouldnt be an option here unless it was wireless.

    Any help in this matter woould be greatly appreciated

    Thanks

  2. #2
    Hi Peter

    Good question!!
    Just be a little careful with RS232 as well over "longer" distances as the signal drops off dramatically at higher baud rates. I do weighing applications and you will often lose signals unless the rate is low and a video signal will need a pretty fast connection. It would be a shame to have to drop to analogue too. Maybe looking at wireless is a viable option??

    Chris

  3. #3
    Senior Member SC358's Avatar
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    This is in regards to an office type portable projector not industrial type. The most common is 15 High Density pin (SVGA) out of a laptop to 15 hdpin projector. In some cases with a Mac laptop it is DVI so you would need an adapter in that situation to convert to a standard svga connector.

    Wiring this way gives you the advantage of modifying the resolution which you could not do if connecting both pieces via video cable.

    Due to the cable length you are already on the edge of getting a good or bad signal to the projector, this is due to the various RGB drive circuit of various laptops (there's no standard). Some will have good signals and some won't if different laptops are used. In order to over come the possibility of poor to no signal, I suggest investing into a SVGA booster or amp.

    Hope this helps!
    Last edited by SC358; 25th Mar 2008 at 21:56. Reason: Clarify which type of projector
    SC358
    Relationships are based on compromises - behavior accepted is behavior repeated.

  4. #4
    thanks guys, just quick qestion, would you beleive that most if not all laptops would have this connection factory installed already meaning SVGA or would it be an option as we are trying to make this as universal to incoming clients in this room as possible, adaptors are possible to leave at the location for people to assimilate their computer with the provided equipment but I want to make sure the wall plate will accept the most common type without any conversion, I can put an amplifier in the wall if needed and I figured it would probably be needed with the rs232 if that was what was used, another quick question, if i am using the svga, what type of cable would i use in the wall

    Thanks again guys

  5. #5
    Hi Peter
    Most laptops have a 15pin socket so you can connect another "bigger" monitor and it's a standard computer component available in either male or female. Whether or not you will get a decent signal thru 70' of cable is another matter altogether!! As mentioned you may need an SVGA booster amp.
    It might be an idea to make up your "cable loom" of 70' with 2 female 15pin din sockets on each end BEFORE you install the cable. You will then need 2 short 15 pin male to 15 pin male plugs on a short loom to go from the laptop to the wall socket at the laptop end and another from the other socket to the projector. If it works OK then you just need to unsolder one female plug and pull the cable thru the wall.

    Let us know if an SVGA signal is still good after 70' ...it would be interesting to know!!

    Chris

  6. #6
    Senior Member SC358's Avatar
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    Quote
    Quote: ChrisHarding
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    It might be an idea to make up your "cable loom" of 70' with 2 female 15pin din sockets on each end BEFORE you install the cable. You will then need 2 short 15 pin male to 15 pin male plugs on a short loom to go from the laptop to the wall socket at the laptop end and another from the other socket to the projector.
    Or if making the cable is too much of a task, you can always purchase. I suggest also buying one long cable run rather than making up with 2 cables if your trying achieve a 70 foot run.
    SC358
    Relationships are based on compromises - behavior accepted is behavior repeated.

  7. #7
    Thanks Guys, making the cables is not an issue, just wondering if anyone has info on what cable type would be used and who might manufacture that type of cable, i'm assuming like a 15 conductor shielded cable like 22 awg or 24 awg? Does belden, west penn, or so on make this type of cable.

  8. #8
    Senior Member SC358's Avatar
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    I've dealt with Belden but not with West Penn, I'm sure in either case they have what your looking for. Contact one of their specialist so they can give the proper recommendation for your long run, meeting building code and all that fun stuff!

    Aaahhhh... solder, shrink tubes, heat gun and days of teflon...
    SC358
    Relationships are based on compromises - behavior accepted is behavior repeated.

  9. #9
    Hi I have long VGA/SVGA cable that is approximately 50 - 60 ft long. I use it when we have live events where a live feed (either live or video playback) is required. I cannot really see too significant a drop in signals, but I must say that this observation came generally, not with a lot of scrutiny.

    Lately I have been using a booster. I use Kramer tools.
    There's no bad camera, just a bad user
    Loong . Singapore

  10. #10
    My laptop has an HDMI and an S-Video out, and plugs right in to the projector.....however, i guess it is all about what you have
    Manoni Productions
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