As most of you know, getting a descent length of VGA monitor cable is a costly thing. With this instructable I'll show you how to make a 15m long VGA cable, out of plain ol' CAT5 network cable.
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Step 1: Strip you filthy cable you! Strip!

To make life a bit easier, strip of about an inch of the CAT5 outer insulation. And behold: 8 precious wires in pretty colors. Make sure you strip about 2/3 mm of the inner wire insulation. Try using an wire stripper. I use my teeth, because Macgyver does it too. Don't make it to long as it could shortcut when fiddling all the wires in the VGA connector.

Step 2: Soldering is fun!

Well the next thing to do is solder the wires to the VGA connectors you bought. The best connectors are male ones. But my local radioshack didn't have em, so he sold me the female ones with an male-male adapter. As long as it works i say! The connector have got the pin numbers on the solderside, and with the help of a scheme i stole from i can solder the right wires to it. Note that im not using an RJ45 connector as shown on the illustration, thats not necessary in my application (very awsome home cinema set).
Just solder the shown colors to the right pins. Good luck with the bridge for pins 5, 10 and 8, naah it's not really that hard =)

Step 4: Check if it works!

Connect the cable to the computer and to the beamer. Make sure your graphic card settings are correct and presto! VGA over a CAT 5 cable! I have no idea how long this cable could be. i made one that was 15m long and it worked perfectly @ 1024x768, so hallaluja! Enjoy!
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Shumdez29 days ago

I recently needed to do this for a work project and found a few things that might be helpful to others. This tutorial works great if you don't need monitor detection as mentioned in the below comments. You could also mentioned below force the resolution, but it's just not practical in a business setting. So if the cable is 10 foot or less(Tested 10 and it worked, tested 30 and it didn't) you can add the 7 and 6 pin to the solder bridge and then solder those cables to 15 and 12. This gives you monitor detection and at a short cable length it still looks okay. The end solution that I found was to use two cat5e cables. Cable 1 is used for red, green, blue(pins 1,2,3) and also their respective grounds(pins 6,7,8) and then cable two is used for pins 5, 10, 12,13,14, and 15. This way I could extend past the original ten feet and still detect the monitor. The pin out I used is as follows:

Pin 1: Orange cable 1

Pin 2: Green cable 1

Pin 3: Blue cable 1

Pin 5: Brown cable 2

Pin 6: Orange/White cable 1

Pin 7: Green/White cable 1

Pin 8: Blue/white cable 1

Pin 10: Brown/white cable 2

Pin 12: Blue cable 2

Pin 13: Green cable 2

Pin 14: Orange cable 2

Pin 15: Blue/White cable 2

Also when soldering this many pins the easiest way was pins 6 7 8, then 1 2 3, then 10, and 12, then 15 14 13 12.

Also I think the maximum footage with this pin out is 75 feet. I have yet to try that though. Hope this helps anyone looking into this.

CorH1 month ago

Does anyone have experience with cables up to 50 meters long? I would like to extend a VGA cable to a projector. The distance is about between 40 and 50 meters. Is it a problem with that length? I wonder if there is anyone who has this experience. I can just buy a VGA to VGA cable, but this is obviously cheaper.

CorH1 month ago

Does anyone have experience with cables up to 50 meters long? I would like to extend a VGA cable to a projector. The distance is about between 40 and 50 meters. Is it a problem with that length? I wonder if there is anyone who has this experience. I can just buy a VGA to VGA cable, but this is obviously cheaper.

sippuddu2 months ago
Aiuto e ciao collegare dvr a tv con vga cat5 vga riesco
MIGUELC34 months ago

Hi. I know this thread is old but I need to ask you guys a technical question:

If I make a cat5 cable with a male DB15 on one end and a RJ45 on the other end and plug it into a hub , will I be able to replicate the signal by using a similar cable on any port and connected to several screens?

Thus, transforming my hub into a VGA splitter?

Thank you

please dont do that, wont work

PinoyMaker made it!1 year ago

I just finished mine worked great, I used it at 1280x1024 and it did fine.

By the way I'm from the Philippines, I had a hard time looking for a DB15 plug and so I decided to cut up an old extra cable that i have. I connected mine to 8-pin female boxes so it would be more verstile.

I also found a commercial version over the net(see pic).

But if the cable would be used as a permanent solution this instructable would be the ideal way to do it if you can get the proper connectors (without the adaptors)


Sir, you can find the db15 plug in deeco. they have branches in alabang and quiapo. I was wondering where were you able to buy the 8 pin box?

vamc91 year ago

As you shown in step 2 blue-white color LAN cable from pin number 6 is connected through 5,10,8 pins of VGA or only pin number 8. Please help me for connecting properly. And this can be used in video streaming from DVR to monitor

bhurst21 year ago
where did you get the male 15 pin connector? I have looked everywhere. I took apart a monitor cable I already had but the pins where all surrounded by glue. There was no way it was going to work.
search ebay for VGA hood or DB15 hood or D-sub 15 hood.
     Thank you sir. That is fantastic. I have tested this with a run at least 70 feet through a patch panel and looped back to a TV in another office with no amplification and got only slight ghosting.

      I also went with normal straight through pinout on the RJ45 connector and it did an awesome job. of course after I did this I did a quick google search and found this. Which at $5 is well worth the time I put into soldering all those things together. But this method definitely works. Thanks again.
twhetstone1 year ago
Do you have a diagram of which wires act as video and v-sync and h-sync and grounds?
E_MAN3 years ago
Nice Instructable! I just have one question, is the any way to add a PS/2 extension to this too. I assume it would be easiest to connect all the GNDs that you split apart, and the GND of the PS/2, but you will still be one connection short. Any ideas?
mlandgraaf (author)  E_MAN2 years ago
Yep, run two lengths of cat5 cable ;)
Seriously, the vga signal needs all 4 pairs of wire so doing it over the same cable would be a no-go.

Maybe if you use the same trick to extend USB over cat5, ass a USB hub and an USB to VGA converter it would work. Don't know if the usb would handle the extra length though.
nah, usb wont handle anything over 8 meters.
something to do with timing.
but usb repeaters are quite cheap.
check eBay
daleruisky2 years ago
Great Instructable!! Helped a ton. I made a 35ft. cable for a projector mounted on the ceiling. No problem with the image quality whatsoever. Thanks again!
LEducated2 years ago
Yes! I made It. Thanks to you IDOL. A Project in my son's school is completed using your instructable. I installed a Ceiling mounted LCD Projector with a 10 meters long cable.and its works.I like the soldering part LOL.I let my students create their own.thanks.MABUHAY!
I bought the connectors today, and forgot the housings. I might try to build my own or break down and buy some.
NatDaGamer2 years ago
Great Instructable man! Helped a lot, and save me a few pennies as well. Needed a long enough lead to hook up my projector, and now I have one! In regards to bridging the connections, I found using some bare wire in each terminal 5, 8 and 10 all joined together and then soldering the blue dotted cable the easiest way to bridge the connections. :)
mlandgraaf (author)  NatDaGamer2 years ago
hi man, good to hear it helped you out!
I made a 100+ foot one of these for connecting our church computer to our beamer...and so far every computer I have used, laptop or desktop has worked perfectly. Would recommend to anyone.
mlandgraaf (author)  churchsoundguy2 years ago
good to hear it helped you out!
blob842 years ago
What solder have you used?
It is very hard to do, the twisted pair will break easily.
mlandgraaf (author)  blob842 years ago
Just use normal lead-free solder, very thin. If the solder doesnt flow good, use some flux...
tecnoweb2 years ago
I've followed the schema and used the correct CAT 5 Patch cable. Unfortunally the vertical frequence is not transmitted and no images is displayed? How can i fix the problem? Thanks
mlandgraaf (author)  tecnoweb2 years ago
Hmm,. Maybe you shorted out a connection? It should work as normal!
Try another cable otherwise
Yes, I've tried with another cable but the result is always the same? What kind of monitor have you used?
mlandgraaf (author)  tecnoweb2 years ago
Just a normal 19" lcd monitor to test, and a 1024x768 beamer also!
how do you know the v-sync signal is not sending?
I'know because the CRT monitor that I've used (with a LCD - no signal) visualize the message v-sync: 0.
Zigster0074 years ago
 I just did this, I bought the D-Sub Connector and Connector Hood from RadioShack. They already have solder terminals on them. So far i have tried a 50ft cat5e and it works perfectly, i also tried a 300ft cat5e and it did not work. So obviously somewhere in between is the limiter. But for any normal household 50ft should be enough distance to go from one side of the house to the other. 
From everything Ive read, you can only run cat5e up to 295 feet (90m). That's the standard when using the wire with a switch/router/repeater at one end. I have no idea how much power output comes from the video out connectors on a videocard but I doubt it would match that of the switch/router/repeater. Anyone have luck with a cable between 50ft and 295 ft?

Amazon has a hdmi to cat 5 convertor that supports full 1080p that claims to work at 100ft.  It's "Passive" as it only uses the build in power output of your videocard.

Once i installed it i notice that the maximum resolution you can get on this is 1600x1200. To fix this i followed a tutorial on which gives a walk through on how to force resolutions. But now i have a weird refresh rate that makes it hard to watch anything on the television. Will update when i figure it out.
pdub773 years ago
Hey, Just did this today and it's awesome! Thanks so much for the info. I don't know if anyone else has pointed this out, but you can use a DB9 to RJ45 Modular Adaptor and modify it to work the same way.  This way you can use whatever ethernet cable you have laying around and change lengths whenever you want.  You will have to buy an HD15 Male Crimp Housing to use instead of the Serial Housing that comes with it as well as cut off the DH Crimp Pins (serial cable size) and mod it with DHD Crimp Pins (VGA size).  All in all, though, it doesn't take much time and it looks like you bought it at the store.  Thanks again!
VGA over CAT5.jpgVGA over CAT5 monitor.jpg
junbata3 years ago
Halo ! I am new here.. I have a question? May be you can help me. I want to control may LCD monitor through cutting of one of the pin of D-sub cable and not the Power source. (To Avoid damaged).
May purpose to this is to Always run the CPU and only Blank the screen if nobody used or force to blank screen to stop the user.

NOTE : I will used relay to ON/OFF this LCD by separate control. Through opening of contact of 1 of the 15 pins.
my problem is I dont know which pins is i will going to control OFF/ON.

Hoping for your future answer..
Thanks !

zealroy junbata3 years ago
Use pin 13 or 14 or both f you want using dpdt relays...
CrudeBuster5 years ago
The scheme lacks the DDC wires, the video board won't be able to detect which monitor type is attached. But its a good idea nevertheless, I was about to do it but I needed the DDC signals, or else Windows don't let me use some resolutions, and some hacking through settings would be necessary.

Too much ado for a simple extender, for me, but it's useful for a lot of people, kudos to you.

To elaborate a little bit on this issue. zigster100 pointed out it is possible to follow the instructions at to force the correct resolution. Basically in the old XP days it was possible to specify any resolution for a screen, but with Vista/7 you can only use the resolutions permitted by your screen (presumably in order to prevent damage to your screen). And because this cable is missing a few wires windows will detect the screen as Standard Screen and only allow 1024x768 which is no good for modern wide screen TVs/Monitors.

However, if you are able to connect a computer to that screen temporarily with a normal VGA cable (or hdmi, dvi), it is possible to "read" this info from the monitor, save it and then force it on your computer so that you will get the correct resolution and other settings when you connect your screen with a UTP hacked cable. Please see the full instructions at the above link as well as all the warnings there! Trust me it is not difficult, please see below:



Read and understand what you are doing. Visit the link above for more info
Don't blame me when you ruin your $3000 HDTV. Smoke CAN happen.
Don't edit the settings you extract unless you know what you are doing!!!


0) Connect the monitor with a proper VGA cable, or any other cable that your tv/monitor accepts, e.g. hdmi, dvi,
1) Download and extract it to a working folder.
2) Run it and click the registry toolbar button.
3) You don't need to edit the settings, unless you are feeling very brave and want to try to force non-standard resolutions or refresh rates - please see the main link at the top for more info
4) Save the EDID to a .DAT file in the working folder.
5) Connect the monitor with your hacked VGA/UTP cable
6) Download moninfo.exe and install it.
7) Open the saved .DAT with MonInfo and make sure it doesn't complain about it - if it does, please see the link at the top
8) If MonInfo reads in an displays the settings the way you configured them in Phoenix then...
9) Select Create INF... from the file menu and save it to the working folder.
10) You can edit the INF if you are feeling brave (see disclaimers!)
11) Open Start, type devmgmt.msc and press Enter.
12) Select the monitor you want to change, right click and select Update Software
13) Use the tried and true "Have Disk" method to select the INF and install it (don't forget to confirm that you are happy to install an unsigned driver).
14) Reboot and enjoy the proper resolution!

Most of the info is c/p from the source link, all credit goes to the author of that tutorial!

On a different note, all VGA cables I've seen in my life feature ferrite cores for interference protection. I don't know whether it needs to be installed, or whether the twisted pairs in the UTP cable should do the job?! Any ideas?
 Use a simple VGA DA....MSV12  search MSV12

But this kills the prospect of using a ethernet cable as extender.
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