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[HandledOut]

i'm with ya here. i don't plan on doing this though.

You say only 2 switches needed, well why even that many? Looks like according to this here you only need 1 switch. You just need _3_wires coming from PiN 22 on that diagram. One to the ln1881, another to the s-video, and another to the Green phono plug for RGB/Component. Of course connect the one for S-Video to the switch state that does the Advance mode (s-video/composite). Also, 2 wires for PiN 1 in that diagram, 1 for the lm1881 and the other for the audio outs...again, based on the either switch state.

Even if i'm wrong, you can definately get by with _zero_ switches if all you want is RGB/Component and VGA. So one would think if you bother adding a switch at all, you could cover them both. Atleast, that is how it looks to me. 3 switches, that's just too much. Even if you need 3 (which doesn't look like it at all), atleast get a 3 state switch (center off).

Good luck, i don't find it worth it at all, but it would be semi-fun just doing it i guess.

Actually, this switch right_here
 has you covered. This could replace all 3 switches (although it's overkill).

or even this_one

A DPDT should work just fine.

i'm not too sure why these guides you see for this, or hdd selector, or multi-bios, or whatever seem to use plain spdt switches. A DPDT is not the same thing as 2 SPDT's. Although the guides are using switches as if they are, making it more complicated with 2 extra throws of a toggle.

[HandledOut]

Wait, hold on. Looking at Switch 1 (Pins 9 and 10) on that diagram, if you plan on using the "Advanced A/V" (which is better than Standard), why do you even need Switch 1 (PiNS 9 and 10)? Also, why do you need Switch 1 if you are doing vga?

Also, like you are saying, really Switch 2 is used in all of them but the "Standard" (why if doing this mod, you would even need that is beyond me).

i have to quit looking at those diagrams, i'm starting to wonder too much.

tim: i just noticed you said dpdt switch, so yeh, you're right. You only need 1 dpdt switch. Sorry, i missed that part :-/. Still though, i don't know why you need pins 9 and 10. i'm too lazy to find out right now, but when you make the cable, you actually only use the equivalent of 2 of the switches. In making the cable you solder the pins directly on the head. i don't think the pins 9 and 10 are used in the vga cable mod at all.

Just checked, (here), nope, pins 9 and 10 are not used at all in the cable mod. Which makes it seem you don't need pins 9 and 10 unless you just plan on using a "Standard A/V" pack (again, why if doing the mod?). Like you say, as far as wiring goes, "Standard" and "Advanced" are the same thing. You could still wire it for "Advanced", just not connect the s-video and other stuff if all you wanted was composite.  Looks like switch 1 is completely useless.

In that diagram for all this though, it says...

"VGA Mode - 1 + 3"

Now if that is the case, it means Switch 1 (pins 9 and 10), which contradicts the vga cable mod. i know the cable works, i've built one myself.  Now i don't know the technicals, but since it says switch 1 in this, and the cable mod says more or less switch 2, maybe then this just means you have to make a connection for something, that more or less in the end enables Left and Right channel audio? Or maybe one of the diagrams is reference the opposite of the other.

[HandledOut]

timdog, if you wind up doing it, make a diagram of what you do...can you?

i'm going to make a diagram for a single dpdt switch, and since i'm not going to do it, i'd like to know if it works. This seems really simple to do with just a dpdt. it seems you really only need 1 diagram.

[timdog82001]

QUOTE(HandledOut @ Nov 4 2006, 02:31 AM)

timdog, if you wind up doing it, make a diagram of what you do...can you?

i'm going to make a diagram for a single dpdt switch, and since i'm not going to do it, i'd like to know if it works. This seems really simple to do with just a dpdt. it seems you really only need 1 diagram.

I don't have time to read through everything you typed cause i have to go to my friend's concert, but the reason i need pins 9 and 10 (switch 1) is because I need to be able to switch to regular s-video or composite output instead of vga so that I can view stuff on my TV as well as my computer monitor.  You need switches 1 and 2 for that.  Also, I have no intention of setting it up for standard mode (just switch 1) because advanced (1 and 2) does everything it does and a bit more.

[HandledOut]

Yeh but with just a simple addition of a capacitor you don't need a whole switch...

for example look at this_here. I made this two nights ago, works fine. (didn't want to buy a the comp2svid adapter for 5usd more, i'm cheap :-/)

So, it's either a capacitor, or a switch.

[timdog82001]

QUOTE(HandledOut @ Nov 4 2006, 03:12 AM)

Yeh but with just a simple addition of a capacitor you don't need a whole switch...

for example look at this_here. I made this two nights ago, works fine. (didn't want to buy a the comp2svid adapter for 5usd more, i'm cheap :-/)

So, it's either a capacitor, or a switch.

I don't see what that has to do with what I'm talking about?  I need to switch between one mode that does only VGA, and another mode that does only s-video and composite.  I'm not trying to switch between s-video and composite.

[timdog82001]

QUOTE(timdog82001 @ Nov 4 2006, 06:48 AM)

I don't see what that has to do with what I'm talking about?  I need to switch between one mode that does only VGA, and another mode that does only s-video and composite.  I'm not trying to switch between s-video and composite.

I should clarify, that when I'm refering to "switches 1 and 2" or "switches 2 and 3" and so on, i'm not refering to actual switches i'm going to make or use, i'm refering to connections that diagram said would require a switch.  The whole point of my post was inquiring as to whether or not I could get away with a single switch to switch between the two modes or not...And I just realized I'm a moron, because I DEFINITELY can.  Hmm.  For some reason I was thinking each "switch" according to the diagram would require two inputs and two outputs, which would leave me short two outputs since dpdt switches have 4 inputs but only 1 common set of outputs.  Ahh...I think I was still thinking about how it was when I had "switch" 2 going through the dpdt switch, because that used up half the space right there.  Ok.  I just need to stop talking and confusing myself.  I know for a fact this will work.  This was a wasted topic haha.  Damn.  I'll make a diagram right away of what I'll do, but its pretty common sense I think.  I must just be too tired.

[timdog82001]

Ok, this isn't pretty to look at, but my ms paint skills aren't amazing you said you were already planning on making a diagram, so here is what I did.  And of course, this would only work if you had no intention of outputing RGB Scart, because there's no way of doing that with one double pole double throw switch.  This diagram is using the same numbering system as the one you linked to in your first response.

[HandledOut]

Ok, that works. However, my point with the s-video is this, you don't need pins 9 and 10. in fact, since s-video uses red and green, i don't think you need "Standard" or "Advanced". it's like the only reason you need a switch at all, is to just get a composite signal (because that is all 9 and 10 are needed for). if you can get composite another way, then your good with just the pins for vga/component.

if you wire the whole thing up for vga/rgb, you can get the red and green and just feed that to the s-video, from there, you can feed that to the composite. Looks like you could wire up the entire thing, including scart, without a single switch if you just used a way to convert s-video to composite, which i linked above. Aslong as you didn't try to use 2 outputs at once (well i guess you could use the s-video and composite), you should be just fine.

Remember, just using any given avp pack doesn't change the video outputs at all (i don't think atleast), it just enables them, if you enable them in the dash. The only thing that could get in the way is if the red and green signal sent to the s-video standard, is somehow different than those that are sent to rgb/scart. i don't see why it would be though.

i'll make my psuedo-diagram tom. and posted it, too tired now.

[timdog82001]

oh, I see what you're saying.  I believe the signal output when in hidef mode is different than what's output in advanced, because everything I've read states that S-video is NOT available in hidef mode.  Only component and VGA.

[HandledOut]

i don't think it's going to work, i'm goign to try it, but from searching the net it doesn't look like it will. The only thing that even gives it hope, but very little, is if you don't enable 480p/720p/1080i and just leave it at 480i when using composite/s-video. But even then, it's not looking good.

Do you know, or anyone, what exactly is being done when enabling the 3 switches? For instance, is s1 enabling comp., s2 enabling reg and green (and blue maybe), is s3 enabling blue? What the switches are actually doing i really don't know. From the diagrm it looks like s3 enables blue, but then again s2 might do that too, just not for rgb. Hard telling without already knowing or having that info.

i can say this, if this_here has to be done then the switch is a _WAY_ better idea.

BTW, what would happen if you permentaley connected pins 9 and 10 too? i ask because if you have the scart setup, don't you need 9 and 10 too? And scart needs RGB aswell, so in the case of you wanting to use s-video, aslong as poins 13 and 14 are not connected, you would default to composite? Basically, what over rides what if you connect all 3 switches permantely? if you could just toggle pins 13 and 14 off and on, then you would olny need a spdt switch.