I'm making a Neo RGB cable... HELP!

David Fallows · Dec 22, 2003

I have the parts here to construct an RGB scart cable for my Neo.

I'm having problems in that I don't know where the pins on the 8 pin din plug (the one that goes into the Neo) go to on the scart connector. Which numbers go where is my question basically. I have 1-9 on the din plug and 1-20 on the scart connector that goes into the TV.

Any help would be much appreciated.

Cheers,
Dave.

BlackSpy · Dec 22, 2003

http://www.gamesx.com/avpinouts/neoav.htm

Good luck with it!

MKL · Dec 22, 2003

http://www.gamesx.com/avpinouts/neoav.htm

And if that's not clear enough, here's another scheme of the Neo A/V port:

Code:

        S       R

      C     B     A
            
       G         5v
           GND

S = Sync
C = Composite
A = Audio

You'll have to put a 100 ohm resistor in the 5v wire inside the cable. Mono goes to both pin 2 and 6 on the scart connector.

David Fallows · Dec 22, 2003

Fantastic.

So much help in such short time.

This forum is brilliant for that. I'll let you guys know how I get on. It's been 10 years since I've soldered anything. LOL. :tickled:

EDIT: Damn, I don't have a 100 ohm resistor. Will there be one inside this here composite cable if I can rip it open?

BlackSpy · Dec 22, 2003

David Fallows said:
Fantastic.

So much help in such short time.

This forum is brilliant for that. I'll let you guys know how I get on. It's been 10 years since I've soldered anything. LOL.

EDIT: Damn, I don't have a 100 ohm resistor. Will there be one inside this here composite cable if I can rip it open?

I can post you one in the next couple of days if you can bare to wait.

David Fallows · Dec 22, 2003

BlackSpy said:
I can post you one in the next couple of days if you can bare to wait.

That'd be brilliant mate! Do you still have my address?

I now need to know which wire the 5v one is and also which numbers each wire goes to on the scart connector.

The cable itself has 15 wires, these are:

Red (fat)
Blue (fat)
Green (fat)
Yellow (fat)
White (fat)
Black (fat)

Red (thin)
White (thin)
Yellow (thin)
Blue (thin)
Bare (thin)

Plus, a super fat grey one containing:
Red (thin)
White (thin)
Yellow (thin)
Black (thin)

thegreathopper · Dec 22, 2003

You do not need a 100ohm resistor and there will not be one in the cable....

David Fallows said:
Fantastic.

So much help in such short time.

This forum is brilliant for that. I'll let you guys know how I get on. It's been 10 years since I've soldered anything. LOL.

EDIT: Damn, I don't have a 100 ohm resistor. Will there be one inside this here composite cable if I can rip it open?

David Fallows · Dec 22, 2003

thegreathopper said:
You do not need a 100ohm resistor and there will not be one in the cable....

Well, we could all find out if I knew which wires to connect to which sockets on the scart connector.

I have a feeling I would only receive composite without the resistor - that's what's wrong with my Saturn lead I think.

MKL · Dec 22, 2003

David Fallows said:
I have a feeling I would only receive composite without the resistor - that's what's wrong with my Saturn lead I think.

No, you'd get composite if pin 16 was pulled low (0-0.4V). When pulled high (1-3V) it enables RGB input by reversing the RGB pins (7, 11, 15) function from output to input and taking composite sync on pin 20. The resistor lowers the voltage from 5v to about 2v in accordance to the scart specs (1-3V).

David Fallows · Dec 22, 2003

Ok guys, thanks for the help so far. I might even get around to fixing my saturn cable at this rate! :buttrock:

However, I still need to know where the above listed wires go on here...

Code:

        S       R

      C     B     A
            
       G         5v
           GND

...and also, to which pins on the scart connector. For instance, which colour wire do I use for the green signal (hole 5) and which scart pin does it connect to? Is the 5v wire the one that is bare? After I find out all I need to do is finally solder all this together, fit a resistor, then I'm rockin'. :buttrock:

(I don't give a crap about audio - I'm using the headphone jack for that, so I don't need to know about connecting sound unless it's essential to the running of the cable)

MKL · Dec 22, 2003

Code:

        S       R

      C     B     A
            
       G         5v
           GND

R to scart 15
G to scart 11
B to scart 7
C to scart 20
A to scart 2 and 6
GND to scart 4 and 17
5v to scart 16 (through 100 ohm res.)

David Fallows · Dec 22, 2003

OK man thanks, I take it it doesn't matter about which wires I use for each connection?

dreamstationx · Dec 22, 2003

scart lead

Hi Dave...
I got an RGB SCART lead here... if you have no luck after all the help then I can tell you what wires go to what pins as its easy to open both end on the leads.....

but have a go yourself first... you ll get a good buzz if it works after you did it yourself !!! :buttrock:

Fluff_Daddy · Dec 22, 2003

Making an RGB cable look good = teh hardz0rz..

so I recomend you to get a PS RGB cable and cut it off in one end and solder the neo connection there. That should make this a lot easier.

Arakon · Dec 23, 2003

just what is hard about making a RGB cable look good? get a decent plug for each end, some shrink tubing and you'll get a professional looking cable easily.

Fluff_Daddy · Dec 23, 2003

Making the shrink tybing look good. And sldering inside the SCART connector. Those are the tough parts.

MKL · Dec 23, 2003

The main problem with making an RGB cable look professional is the DIN plug because the plugs used for DIY cables are plain shit:

These things are not resistant to mechanical stress and are crappily designed (and look bad)...they will never be like a factory made cable 'cause those are molded and never break.

Factory made DIN cable (not mini-DIN) are very hard to come by 'cause they almost have no applications anymore...luckily I managed to find a seller that carries the 8-pin type for the Neo and they are very well made, with double shielding (mylar foil + braid) and gold-plated contacts...

As for the scart connector, I would just avoid the normal ones with black plastic shell 'cause they're flexible and therefore suffer from the same problem as the DIY din plug: scarce mechanical resistance when you plug/unplug it in the TV socket. There are hi-end scart connectors with metal shell and gold-plated contacts and the advise is to fill the shell with hot glue after you've done all the wiring, again to avoid mechanical stress on the pins...

The problem with heat shrink I take it as a joke?

David Fallows · Dec 23, 2003

Red (fat)
Blue (fat)
Green (fat)
Yellow (fat)
White (fat)
Black (fat)

Red (thin)
White (thin)
Yellow (thin)
Blue (thin)
Bare (thin)

Plus, a super fat grey one containing:
Red (thin)
White (thin)
Yellow (thin)
Black (thin)

Which of these wires in the cable do I use? And which pins do they go to?

I could easily buy a PSone scart cable and chop that up but no one stocks RGB cables in my town anymore for some reason.

MKL · Dec 23, 2003

David Fallows said:
Red (fat)
Blue (fat)
Green (fat)
Yellow (fat)
White (fat)
Black (fat)

Red (thin)
White (thin)
Yellow (thin)
Blue (thin)
Bare (thin)

Plus, a super fat grey one containing:
Red (thin)
White (thin)
Yellow (thin)
Black (thin)

Which of these wires in the cable do I use? And which pins do they go to?

Why do you want to use a 15-core cable when all you need is 7 wires? And quite apart from this your question makes no sense: you can use whatever wires you want provided that they're wired in accordance with the pinouts given above. Example: you decide to use a yellow wire for sync, then you'll want to solder one end to scart pin 20 and the other end to pin marked C of the DIN plug as shown in the above scheme. And then you do the same with the other wires. The colour doesn't mean anything...

And don't use PSX cables as they have capacitors in the RGB lines that you don't need.

David Fallows · Dec 23, 2003

MKL said:
Why do you want to use a 15-core cable when all you need is 7 wires? And quite apart from this your question makes no sense: you can use whatever wires you want provided that they're wired in accordance with the pinouts given above. Example: you decide to use a yellow wire for sync, then you'll want to solder one end to scart pin 20 and the other end to pin marked C of the DIN plug as shown in the above scheme. And then you do the same with the other wires. The colour doesn't mean anything...

And don't use PSX cables as they have capacitors in the RGB lines that you don't need.

Ok buddy - I've discarded the 15core cable and now I have some fresh cable with 10 wires inside, all different colours and one bare wire. I take it the bare wire is the ground?

I'm gonna start soldering the coloured cables until I find out anyhow.

Also, when I'm connecting one wire to 2 different scart pins do I separate the wire or just run it from one pin to the next?

David Fallows · Dec 23, 2003

What about composite sync? (S) Which scart pin does that go to? Is that even needed?

Also - Do I need to bother with scart pins 13,9 + 5? (R,G + B ground)

MKL · Dec 23, 2003

David Fallows said:
Ok buddy - I've discarded the 15core cable and now I have some fresh cable with 10 wires inside, all different colours and one bare wire. I take it the bare wire is the ground?

That's the shielding (against RFI interferences) and goes to pin 21 (the metal part that goes around the pins). At the other end of the cable solder it to the shield of the DIN plug (the metal part that goes around the pins).

David Fallows said:
Also, when I'm connecting one wire to 2 different scart pins do I separate the wire or just run it from one pin to the next?

Solder the wire to a pin and then solder another piece of wire from that pin to the other pin.

David Fallows said:
What about composite sync? (S) Which scart pin does that go to? Is that even needed?

No, leave that alone. Use C (composite) as sync and solder it to pin 20 of the scart.

David Fallows said:
Do I need to bother with scart pins 13,9 + 5? (R,G + B ground)

It's not necessary. Just solder the ground wire to pins 17 and 4.

I'm making a Neo RGB cable... HELP!

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