Scart Over UTP

Introduction: Scart Over UTP

Hi folks,

I've been reading instructables for a while and I found that there is no information about how to do a scart (or a RCA) over ethernet.

The motivation for this project is simple, connect your VCR/DVD player or SetopBox to a television a little bit far from the source. In my case my setopbox is connected by HDMI to the living room TV and I wanted to connect it to the kitchen TV.

Why Ethernet?
It's a cheap cable, very robust. It was designed to use with digital signals, the even numbers send the signal and the odd numbers send the opposite signal (for example 1 and -1). The pair is then twisted so the interference is lower over the range. In this case we will use it to send an analog signal and only try to rely on the twisted pair feature. We will send the signal on the even number and the ground from the signal on the odd.

Why Scart 21 (or RCA)?
It's a very familiar cable, offered with the most of european VCR/DVD player. It has 21 pin but we will only need 5 of them. In my implementation I will use 6, so I have an extra twisted pair to send another signal, for example the telephone or the IR for the remote.

Step 1: Materials


-Good quality scart cable (mine has color cables and a good shielding between cables)
-Female RJ45 (you can find it at your local hardware store or use from old network cards) You can also use a crimp tool and male RJ45, and buy female to female extenders on ebay for $1.
-An cutting tool (scissor for example)
-A long patched UTP cable (my test was done with one with 8m)
-OPTIONAL Multimeter

Step 2: How To

Open the enclosure from the scart cable. Cut from the base about 10cm. Unfold the wires, leave about 5cm from the base. Locate the wires you need, video out and video ground, audio left out, audio right out and audio ground. I also used the general ground but it's not mandatory. Cut the others to be simpler. Connect the video to the first rj45 pin, and video ground to the second. Connect the right audio to the third and the ground to the fourth. Connect the left audio to the fifth and bridge the audio ground from the fourth to the sixth (I used the general ground on the sixth).

(OPTIONAL) Test the cable with the multi-meter to guaranty that you do not mix-up the cables.
(OPTIONAL) Glue the female connector to give it strength.

Mark the connector as SENDER (so you will know that is the one to connect to the source), and close the enclosure again

On the second, be careful. If your cable is colored has mine you just need to follow the colors, if it is not colored, you need to connect the video in and video ground, the audio left in and ground, and also, the audio right in and ground.
Do the same procedure as before and mark it as RECEIVER.

Step 3: FINAL

Test your new cable and enjoy!
You can also do this procedure using male connectors but keep in mind that is difficult to crimp this kind of cables. Also the female extenders are expensive as the female connectors so this is the more efficient way to do it.

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    6 years ago

    Hello, trying to this, but can you upload more detailed photos? How did you put one cable into another?

    Thanks in advance.


    Reply 6 years ago


    I'll take a few more pictures.

    In which process are you having doubts? The connection between scart cable and rj45 female?

    Best regards


    Reply 6 years ago

    Hi, I'm Portuguese, although I understand most of it, I'm having doubts yes.

    Is this the correct schematic as follows?
    Scart Pin 19 "Sync Output" > UTP cable White/Orange wire
    Scart Pin 17 "Sync Output Ground > UTP Cable Orange wire
    Scart Pin 1 "Audio Output (left) > UTP Cable White/Green wire
    Scart Pin 4 "Audio Ground" > UTP Cable Blue wire
    Scart Pin 3 "Audio Output (right)" > UTP Cable White/Blue wire
    The "bridge" situation I don't get it, is it to shunt it, how do I do it?

    And the connections probably are doable with a "insulating screw joint" or some "Telephone Butt Splice Connectors – Scotchloks" that probably are more insulating than the 1st option.

    In advance thanks for your time ;)


    Reply 6 years ago

    Also is this schematic for the both tips of the cable?