Help connecting 8" LCD

[legoman666]

http://i28.photobucket.com/albums/c241/legoman666/lcd1.jpg

I have googled every number and SN on the thing and have come up with nothing. The internets have failed me. I am able to power the device on easily by connecting the left set of 4 pins to a molex. I also figured out the buttons to change the source and such. I know this thing supports s-video in. I've tried attaching the Y-In and C-In pins to a s-video cable but the computer won't cooperate.

Any ideas? I would love to use this screen for my mod (http://forums.bit-tech.net/showthread.php?t=163649), it looks like it's fairly high quality. I'd guess it has a 800x600 or so resolution.

[ibby]

ok let me try to help....

but it would slo help ... to know which model of LCD it is.

maybe a full sized picture
12v = +
GND = -
GND = -
5v = +


AF_L = ?
GND = -
AF_R = ?

HSY = Horizantal Sync Signal
VSY = Vertical Sync Signal
GND = -
R_in = Red Pixel Input
G_in = Green Pixel input
B_in = Blue Pixel input

12v = +
GND = -
GND = -
CVBS = Composit Video
TV = TV in ?
C-IN = ?
Y-IN = ?
GND = -
KEY = ?
IR = Infra Red / remote control ?
GND = -
5v = +

you need to use
CVBS
or
RGB

[legoman666]

Thanks. I was able to get a picture on the screen via the CVBS pin. Of course, being composite, it was crappy image quality. Do you think the RGB pins + HSY and VSY would allow me to connect a VGA plug? I'll use the composite as a last resort but ideally I would like to use VGA or s-video. (VGA preferred).

I can post an image of the entire screen, but believe me, I spent hours looking for information on this thing and found nothing. I believe it used to be used in a fast food restaurant.

http://pinouts.ru/Video/VGA9_pinout.shtml lists the pinouts for a 9 pin VGA plug. If I used the HSY, VSY, GND, R_in, G_in, & B_in header group, should I just lump all of the grounds together? The grounds all go to the same place anyway, don't they?

[Frank M]

why not simply d-sub 15?
http://pinouts.ru/Video/VGA15_pinout.shtml

Y-in and C-in might be luma and chroma (aka YCbCr for analog and YPbPr
for digital), but that's just a wild guess, and you'd need two chromas
(blue-green and red-green: Cb&Cr or Pb&Pr), so it might not be it.

Very nice project, and great cad sketches.

If I were you, I'd leave the PSU, HDD and many other stuff outside (not
submerged in oil) and only put the mobo with cpu and gfx cards under
oil with passive cooling and a bit of oil-flow/current. Some say fans don't
like being submerged in oil; I don't know, I've never tested...

[legoman666]

why not simply d-sub 15?
http://pinouts.ru/Video/VGA15_pinout.shtml

Y-in and C-in might be luma and chroma (aka YCbCr for analog and YPbPr
for digital), but that's just a wild guess, and you'd need two chromas
(blue-green and red-green: Cb&Cr or Pb&Pr), so it might not be it.

Very nice project, and great cad sketches.

If I were you, I'd leave the PSU, HDD and many other stuff outside (not
submerged in oil) and only put the mobo with cpu and gfx cards under
oil with passive cooling and a bit of oil-flow/current. Some say fans don't
like being submerged in oil; I don't know, I've never tested...

Thanks for replying.

The d-sub15 has a bunch of pins that my LCD input doesn't have, so I linked to the 9 pin d-sub for simplicity's sake. The actual output on my video cards are 15 pin, so when I actually wire the thing up, I'll use the 15 pinout config.

As for the actual project, Puget systems have done something similar: http://www.pugetsystems.com/submerged.php#update3 As you can see, they've had the system up and running for well over a year now with no problems. I may have a SSD sponsorship in the works, so there might not be any platter drives in the system at all.

Cheers, I'll give the VGA idea a try when I get home.

[Frank M]

I've seen/heard about Puget's when they were building it and also
seen some more before; the fans was an issue that came up during
many discussions. Puget's fans still live, so it might be a non-issue
after all; however, they also kept the HDD outside, they too only
submerged SSDs. HDDs have small holes to even out pressure --
the oil could seep in through those holes.

For the VGA, some high surface are passive cooler with heatsinks
on the voltage regulators should work wonders.


The oil setup is nice till you find that upgrades (or even worse,
RMAs) will be a pain in the @ss. Cleaning oil off the parts, well...
that's why I went with simple water-cooling :D
Not to discourage you, you've already worked a lot on it, and it
looks great, but you'll have to be prepared for this :)

Good luck!

[cirthix]

http://pinouts.ru/Video/VGA15_pinout.shtml

video card -> panel
1 RED --> R_in
2 GREEN --> G_in
3 BLUE --> B_in
4 ID2 <-- leave floating
5 GND --- Ground
6 RGND --- Red Ground
7 GGND --- Green Ground
8 BGND --- Blue Ground
9 KEY - Key (No pin)
10 SGND --- Sync Ground
11 ID0 <-- leave floating
12 ID1 or SDA <-- leave floating (optionally, add an edid chip for auto-detection)
13 HSYNC or CSYNC --> HSY
14 VSYNC --> VSY
15 ID3 or SCL <-- leave floating (optionally, add an edid chip for auto-detection)

Join all grounds at the panel-side ground pin.

[HeXploiT]

Sure would be nice if one could just buy an adapter for this.

[cirthix]

diy isn't hard.

[legoman666]

Thanks guys!

http://i28.photobucket.com/albums/c241/legoman666/mineral%20pc%20log/0223092345a.jpg

Now I just need to figure out the drunken scheme for the buttons on the panel. The power button is power, but the menu button doesnt open the menu, the source button does. And I still haven't figured out what buttons navigate the menu. lol.

Screen res is 640x480. Little guy is pretty sharp. Should suit my needs quite well ;) I shocked myself 3 times with the damn CCFL voltage. Something like 700v. Owie.

[cirthix]

:)

now cannibalize some dead ram for the spd chip and flash an edid to it.

[Frank M]

now cannibalize some dead ram for the spd chip and flash an edid to it.

Even though your title ("The un-extreme XIP") says otherwise, this
sure is extreme! :ROTF: :up:

[cirthix]

Even though your title ("The un-extreme XIP") says otherwise, this
sure is extreme! :ROTF: :up:

I'm just not an extreme overclocker. I set my stuff for max 24/7 stable speeds and don't screw with it once it's done. When it comes to mods (not vmods) and other stuff, I'm pretty far into the extreme category :D:cool:.

[legoman666]

:)

now cannibalize some dead ram for the spd chip and flash an edid to it.

Heh, do you have a link to a guide on how to do this? I wouldn't be opposed to such a mod as long as I don't have to purchase anything. I'm sure there's a dead stick of ram around here somewhere. Although I suppose the main problem is that I don't know how to flash something.

And also, what is the benefit?

[cirthix]

Both the SPD chip and the EDID chip are small I2C serial eeproms
http://en.wikipedia.org/wiki/Serial_Presence_Detect
http://en.wikipedia.org/wiki/EDID

Both are also 128 bytes, just a matter of putting the correct image on the chip.

There are two lines, SDA and SCL, which will be hooked up to vga as such:

Pin 12 SDA I²C data
Pin 15 SCL I²C clock


EDID allows for auto-configuration of the display and presents a list of resolutions and timings that the monitor is capable of displaying.

A correct EDID image maybe created by a program called "phoenix edid designer", and may be flashed to the bad stick of ram by connecting the chip to the system i2c or smbus and using an spd flash program. The easiest way would be to tape off all but power, ground, sda, and scl on a bad stick of ram, drop it in (i2c/smbus is hotplug capable) the mobo. Desolder it after it is flashed and attach it to the end of your vga cable (you will only need sda, scl, gnd, and power).


enjoy :)

edit: I have not done this before, but have it planned for a future project.

[cirthix]

For example, video cards which use edid and gpu-scaling for pre-boot screens will only display the pre-boot screens (like post, bios, os install, everything before video drivers are loaded) to recognized displays.