Thread: PSone LCD: Possible to switch between VGA input and RCA input?

Good question, I'll be faced with the same issue soon. Does the GF2 have composite out or did you build the x,y convertor circuit? I had to use the circuit for my nForce2 MB.

I would try hooking both signals up and see which it would default to. You may have to get fancy with a disconnect vga-restart PSone circuit to flip over to RCA in.

Also does the GF2 auto detect the PSone? The nForce2 won't detect unless you do some trickery with 75ohm ground load on RGB.

It's a 64mb nvidia geforce2 gts

I have no problems with this setup right now except Nvidia no longer provides drivers for this card in their 'forceware" driver package ... so i have to download the 79.xx version of their driver package from their website's archive lol...

all I did was hack the VGA cable off a busted monitor, strip the wires at the end and solder everything together. this is the guide I followed:
http://rudyatek.com/tidder/lcd/

I combined the VGA pins 13 and 14 and connected it to the blue wire just like the guide. No csync circuits or anything.

I also have no problems with "auto detection." Since the geforce is the only display adapter in the computer, it's basically "Forced-On"/ Always on. I have powerstrip loading on startup and put it into the correct display mode for the LCD.

That's odd that you have to do the VGA dummy think for it to know you have a monitor plugged in. Is that a secondary display device? normally, if it's your only display, it's always on. I don't know much about onboard video though.

I'm going to try the dual signal thing right now and find out what happens. I'll post my results shortly. Feel free to ask any more questions!

Alrighty, that wasn't too hard at all.

With both VGA and composite connectors connected to a display device, composite will be displayed.

I've found 2 ways to revert back to the VGA device.
1) UNPLUG the composite connector.
even if the composite (yellow RCA) device is powered off, it will still display a blank picture. you must unplug either end of the RCA cable for it to go back to the device displaying a VGA signal. (by either end I mean the minijack on the screen, or the yellow rca from the device)

2) there seems to be a sensing wire. it's this blue one i have pictured below. I cut this wire, and it displays the VGA signal. I reconnect it, and it displays the composite signal.

I plan on using method #2, and putting some kind of toggle switch or push button to switch between the 2 display devices.

Here's a picture.. I couldn't really find a good angle to fit everything in.






If you're anything like me you forgot where all the connectors go on the little boards, etc.

here's a run down.

1) your VGA wire connector plugs into the left connector on the LCD board. (red dashes painted in picture)

2) your composite connector plugs into the RIGHT connector on the LCD board.

3) the other end of the composite connector plugs into the connector on the OUTSIDE EDGE of the composite board.

the BLUE WIRE on the OUTSIDE of the composite connector is the "Sensor wire" that I use to switch it on and off
(the blue wire is cut in this picture. it is painted blue. LCD is currently displaying VGA from computer)

I was thinking about it, and there might be an easier way to do it.

If you're using a backup camera, you could try putting a switch on the camera's ground wire. This whay you're essentially breaking the circuit, and there's nothing for the LCD to "sense"...

I have no way of testing this method though. -- I'm assuming it would work...

Relay on the backup lamps to engage the RCA circuit.

I'll try your method w/o the c-sync circuit.

nForce2 is onboard and will default to TV-out if no VGA is detected. Very annoying!

Ok, so I just got all the adapters / wiring needed for the PSone Mod (RCA). I am running this from my Video card (Radeaon 9600 Pro) to the S - Video on the back of the card. On the other end of the S-Video coming from the vid card is a Yellow RCA which meets up with another Yellow RCA and I have bought an adapter for them to connect to. The wire from the 2nd yellow RCA goes to the black 3.5mm Jack above the Green. I am running the Power to the psone to the wall outlet for power. I installed PowerStrip and my question is now, How do I enable the secondary (PSone LCD) monitor? For some reason it seems as if I didn't hook something up correct. Here are two pictures.

The two Yellow RCA's connected with a Coupler.



Power cord going to the wall outlet on the left. The black is the cable with the 3 RCA's, The yellow connecting to the Yellow RCA coming from the S-Video that is connected to the back of the vid card.



Any help much appreciated. Thanks

-Xzi

Originally Posted by mattress

So, right now with my current setup, I have a 5" psone screen with the VGA mod molded into my dash, and i'm using a GeForce2 GTS 64mb AGP card to send a 640x480@15Hz signal to it. It's working surprisingly well with minimal flicker, etc like I've seen with the matrox cards.

Sorry if this is a bit off topic, but...

Have you been happy with the PSOne screen in your dash? I currently have a 7" touchscreen LCD from mp3car.com, but like everyone else, I hate the fact that it's not sunlight viewable, and I'm thinking of switching. From my testing, it seems like the PSOne screen is viewable, even on sunny days and in fairly direct sunlight. Has that been true for you too?