S-Video Balum for RJ45 Network Cable




Introduction: S-Video Balum for RJ45 Network Cable

In a previous Instructable, https://www.instructables.com/id/S5YML6MFLFHVHAP/ I created a cable to send AV over a patch cable. I have been working on a few variations to the theme.

S Video is a higher quality signal than using phono connections and Scart is a very convenient connection as it combines all the connections in the one socket.

The Scart diagram included is the break out side to the TV. Scart input is wired differently and is really easy to search for in the usual ways.

I have decided to just go for the s-video connection at the moment but I include the pin outs for the Scart if you feel adventuress.

You will also notice that I show a jack but i actually used red and white phono with a phono/jack adaptor on the pc end

Step 1: Tools Used

The tools I have used will be found in most tool collections. Side cutters and a blade for cutting and stripping wires. A soldering iron and solder all joints will need to be soldered.

I have a very small vice that I use for holding items I could really do with another hand though he he. I also find that a good light source can be invaluable. in the second picture the glare has made the desk look blue. you can also see on the desk an old ADSL filter that I had not thought of using at the time but I will come to that later.

step 1:- Connect the wires to the RJ45 terminal. solder each terminal. I found it easier to work from the back row and move away from me that way the soldering iron didn't burn any of the connections I had already made.

Step 2: The Computer End

The computer side. I decided that there would not be much movement at the computer end as the cables are behind the PC. having soldered all the connections I then taped the socket to the wire. this stopped most of the stress on the joints.

Step 3: Connecting to the TV

I used an old ADSL Filter box to make the connection on the TV side. On my TV the connection on the side is used for the playstation, the wii and now the PC. So I felt that I needed to make a robust terminal for the job.

Step 1:- I used a bit of double sided foam tape to stick the RJ45 terminal in the box. I originally tried to connect the terminals in the same way as I had on the PC end but I found that working in the box was too tight so I stripped a bit of network cable and soldered it to the RJ45 terminal.

Step 2:- I then cut a bit of strip board and attached my jump leads on the one side and my AV cables on the other side

I then taped around the box and was ready to plug it in.

My Patch cable is 10 meters long and runs around 3 walls between the TV and the PC.

Step 4: Up and Running

The TV is connected and running. A few tweaks in the graphics card menu and we are done.

This cable is great for watching videos and showing slide shows to the family although the picture is better than the old phono connection I made https://www.instructables.com/id/S5YML6MFLFHVHAP/ There are still resolution issues. In order to use this screen as a monitor you would need a VGA connection on the TV.

A few tweaks that I did that arn't shown in this instructable

I rewired the PC end the same as I had at the TV. I found that it was kicked a few times and I lost the audio

A plan for the future is to pour hot glue into the ADSL Filter box to hold the cables in better.

Good luck with making yours.

after I created this cable I found this instructable check it out. very similar to mine but retains use of the network cable for sending the network signal. very clever..

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    6 Discussions


    3 years ago

    Hello, trying to something similar but Scart to RJ45 Cable than to Scart again.

    The schematic is the same for both ends of the cable?
    This is quite confusing me.

    Oh well, thanks in advance ;)


    5 years ago on Introduction

    I made this but I did not have as much luck and was unable to get a picture at the other end of a short cable. ( oddly this is after my VGA experiments ).


    11 years ago on Introduction

    This is a cool project. I did this once. I would like to point out that this, however, is not a balun. (yes, its spelled with an 'n'). Actually, now that I think of it, a balun would be a good idea here. For those that don't know a balun converts from BALanced signal to an UNbalanced signal or vice-versa. Balanced would be like XLR audio or network cabling. unbalanced would be a phono cable. Generally anything twisted lead is balanced, anything resembling coax is unbalanced. you can do it with a small 1:1 transformer that has center taps.


    Reply 5 years ago on Introduction

    yes I would like to point that out as well, as it's a straight pin to pin gender change and no signal balancing.


    5 years ago on Introduction

    as for resolution, you really must upgrade your connection as s-video & composite video are limited to (old) television resolutions 640x480, 800x600 or downscale 1024x768 ( and anything above ).

    but don't fear your cable can be reused for VGA! ( assuming it is in fairly decent condition and under 75 feet, although longer lengths have been achieved )

    however be warned that VGA does not carry audio on the cable!








    if you track down the datasheet for this, it has a very nicely listed diagram and pinout. that way we can keep things standardized and interchangeable, as one of the above 2 articles have some of the lines reversed.

    i did the above, however using DB-9 to RJ45 adapters and substituting the DB-9 connector for HD-15s. I also did a similar thing using old monitor pigtails and dual ethernet cables to carry the sync data, leaving me with 2 unused pairs for ...... audio, video or ethernet/internet.


    8 years ago on Introduction

    very nice,,i have a little interference,,,what happend with the ground of the s-video connector ??

    Regards !