Is there anyway I can make a cable that can output to the yellow plug of an rca cable rather than component?

Posted at 6:56 pm on Jun 20th, 2006 by wrathofpyro

First post.

Woot

–CrashGames.biz

Posted at 7:05 pm on Jun 20th, 2006 by Jeff Parker

I don’t believe so, wrathofpyro. The standards are not compatible. The VGA connector provides Red, Blue, and Green component video lines, but the RCA composite video consists of a Y signal for Luminance/Brightness and a UV signal which itself is composed of two separate colour signals mixed with a colour carrier frequency. You could probably do it, but at that point it’s not a simple hack anymore and you’re better off buying a stock converter of some kind. (Assuming one even exists.)

Posted at 7:31 pm on Jun 20th, 2006 by furtim

Nice to see more simple mods anyways…

Posted at 7:44 pm on Jun 20th, 2006 by Crash

sigh thats too bad then… I had a junk monitor I wanted to play ps2 with

Posted at 8:21 pm on Jun 20th, 2006 by wrathofpyro

You COULD get a PS2 component cable and a component-RGB converter (read: not cheap), but I don’t think it’d be worth your while. There’s also the option of getting a sync converter and a modchip (this would be the hacker way), but that’s also expensive (not to mention dangerous for your PS2).

One thing that bothers me about these Cat5 VGA mods is something an electronics pro told me: VGA cables are measured (with a square wave sent down each wire) so that the signals all arrive at the same time. However, Cat5 wires are NOT measured that way, and therefore you get more and more crap in your video as lengths get longer (and because Cat5 usually arrives coiled, some wires are already longer than others). Pros get around these things by some sort of adjustment (he didn’t go into detail, but from what I can imagine, there are special controls that can add or subtract small amounts of length to or from your connections).

Is this true, or is this negligible for these distances?

Posted at 10:24 pm on Jun 20th, 2006 by usbcd36

Nuts. I tried to convince my dad at his office to do this but he wouldnt do it. I knew i had seen plans for this somewhere

Then I tried to get him to do the USB through the Ethernet cable sitting at the desk. Nope had to pull a cable for that also.

The computer sits 15 feet away in a closet. VGA over Cat5? nope had to spider a cable that far.

Hope he is happy.

Posted at 10:48 pm on Jun 20th, 2006 by Hal Hockersmith

wrathofpyro, if I understand what you are asking, nearly any off the shelf VGA box should do what you want. They take Composite/S-Video/Component input, and display it on a VGA monitor.

The only problem with that is, the PS2 has very few Progressive Scan games, so the VGA box is going to have to handle the conversion from the 480i output of the PS2 to 480p, which might not look all that great depending on the quality of the unit.

Of course, you would need Component cables for the PS2 as well to get progressive scan.

Posted at 1:28 am on Jun 21st, 2006 by TJ

6:
sounds probable. i was thinking that you’d also get a lot of noise/interference with cat5 cable b/c the lack of proper shielding, which a normal vga cable would have, since vga is an analog signal.

Posted at 1:31 am on Jun 21st, 2006 by andrew

If you really want to go technical (read: expensive), buy some cat6 cable, stranded, no less. It cuts down on the noise considerably, but costs a sh*tload more than cat5. Thicker, too.

Also, it helps a bunch if you keep the VGA cable away from any power cable. I noticed wierd “cross-hatching” in my monitor when I used to use VGA, and moving the cable away from the monitor’s power helps a ton.

Posted at 2:45 am on Jun 21st, 2006 by lolersticks

there would be no shielding of the vga signal unless it used balanced lines like cat5 was ment to be used. unless i have something horribly wrong i dont think there would be any shielding at all

Posted at 5:06 am on Jun 21st, 2006 by bender386

I built one of these a while back to run in my home theater. I’m pretty picky about video quality, and I can’t see any video interference from this setup over what I had previously used. If you have doubts – check out avsforum.com where the real videophile nuts hang out and read the debates there.

If you do a google search for

Posted at 8:57 am on Jun 21st, 2006 by Roo

That was awesome, it’s cool how cat5 can be so virsitile. I was wondering about that vga to component cable. Right now i have a pc, which i use as a media-center, hooked to my plasma tv through a scan converter. The problem is that the scan convertr down-converts any signal it gets to 720×480, for compadibility. I know my tv’s capable of more than that. Could i use the vga to component cable to bypass the scan converter and use higher resolutions? I have a radeon 7000 series card in that computer if it matters. Thanks.

Posted at 11:04 am on Jun 21st, 2006 by PunMaster

cat5 is almost as useful as duct tape. cable extensions, speaker wire, I even used it as a belt once when I ran out of the house in a hurry to get to work and forgot mine.

Posted at 11:07 am on Jun 21st, 2006 by tiuk

wrathofpyro,

what you need is a transcoder. if you only need RCA to VGA you can find them cheap. If you want component to VGA it will run $100-$300+

I have a Nextvision 6 i use for my xbox and it works great! sometimes you can snag one from ebay for cheap (payed ~$130 for mine)

Posted at 2:31 pm on Jun 21st, 2006 by XioPod

VGA is NOT the same thing as component :D

VGA is R/G/B. Component is NOT, however you can transmit VGA over RGB cables, which are the same as component just the signals are not the same, This is why we don’t see VGA->Component adapters. A short explanation….

“Component video consists of three signals. The first is the luminance signal, which indicates brightness or black & white information that is contained in the original RGB signal. It is referred to as the “Y” component. The second and third signals are called “color difference” signals which indicate how much blue and red there is relative to luminance. The blue component is “B-Y” and the red component is “R-Y”. The color difference signals are mathematical derivatives of the RGB signal.”

Component operates on difference, not additive color.

Posted at 4:41 pm on Jun 21st, 2006 by tek

What about a extender with stereo audio signal AND s-video? audio uses two pair, the s-video uses the other two… so far its fine, but how about noise one on the other? Is a booster recommended? Anyone knows how to make a booster for AV???

Posted at 6:31 pm on Jun 21st, 2006 by luiz_borges

If I am reading your comments correctly, I can use a y pb pr cable with my ps2 to hook it up to this hack then to my monitor?

Posted at 6:37 pm on Jun 21st, 2006 by wrathofpyro

wrathofpyro: no. different video standards.

luiz_borges: I got a lot of ghosting etc over even a fairly short run doing that, but I suspect the cable runs over top of some lighting or heating wires in the ceiling. ymmv. worth a try though I would think :)

Posted at 7:38 pm on Jun 21st, 2006 by ex-parrot

Actually, VGA to component adapters are pretty easy to find:

http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=181-700

Posted at 11:07 am on Jun 22nd, 2006 by Drew

This is cool. For those that don’t understand? There is a trick involved in this.
Every “pair” of wires in the cat 5 cable “must” be transmitting and receiveing the two sides of the SAME SIGNAL. IE, if there is a high frequency video signal on 1 wire, the corresponding ground return for that same signal MUST go through the other cable (the same color). That is what gives you the shielding effect. Any EMI induced in one wire has the counter EMI induced in the other half of the twisted pair. Since the counter EMI is induced in the exact same voltage but “backwards” to the original the EMI is canceled out at the end (where the monitor is at). If you make the mistake of just thinking of the cat 5 cable as 8 wires, you will never make a cable like this work. If you are carefull to ensure that each signal goes thru a “twisted pair”.. this will work.. as well as a shielded cable.
As I remember it, a VGA cable has 3 color signals going through it. One for Red, Green and Blue. The remaining 2 wires are used to piggyback the rest of the pins. Since they don’t carry high freguency AC, they don’t matter as much. Only the 3 AC signals for the 3 colors really matters for video quality.
Interesting.
The only pitfall of Twisted pair (cat 5) over Shielded (VGA Cable) is at higher frequencys. Once the wavelength of the EMI interference gets close to the twists per inch of the Cat 5 cable? The EMI can induce into one cable more then the other. This means the shielding effect works best at low frequencys (like power cables) Just keep it away from super high frequency stuff….. and make sure that any high frequency signals get transmitted and returned on a single pair of twisted wires.
If you understand this simple rule, you can send any high frequency signal over a Cat 5 cable as long as there are 4 or less high frequency signals. (Component only uses 3 so it will work). oh… It is recommended you keep the bends of the Cat 5 cable to a minumum. If you make a sharp bend in the cable, you can cause signal degradation at the bend….

Posted at 6:54 pm on Jun 22nd, 2006 by Calvin Thomas

Is it possible to build a vga-> svideo converter?

Posted at 3:04 pm on Jul 19th, 2006 by nickk678

Your cable is out of spec. A good VGA cable requires 75 ohm internal cables. If you were to run that cable for a longer distance you would start getting convergance errors and rf problems. You might want to try building a high quality cable with five 75 ohm tv cables of equal length. Maybe a short run to a project box then a 5 cable fanout from the box.

Posted at 5:21 am on Aug 4th, 2006 by EMPORIUM

Is it possible to make a VGA splitter using CAT-5? let’s say a 4 output VGA. If you were able to create one do you have a website that I can check for reference? And don’t you encounter any change on the picture quality?

Posted at 3:19 am on Aug 13th, 2006 by triggerman_77

Is it possible to make a VGA splitter using CAT5? Have you already created one and do you have a link that I can use as a reference for making one? thanks

Posted at 3:22 am on Aug 13th, 2006 by triggerman_77

i want to build a vga to rgb to hook to my tv can u help me i got an old vga cable and 3 rca conections….thanks

Posted at 5:36 pm on Dec 30th, 2008 by pa

you can use this adapter http://www.vgaextend.net

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Posted at 11:25 pm on Jan 17th, 2009 by fqpobcluxe

this worked great, http://www.vgaextend.net great product
i never thought it would work this good. i have my TV 50 feet away from my media center PC. HD baby HD for $13

Posted at 4:44 pm on Jan 27th, 2009 by bb