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How to use SCART for our hobby
orchidius:
Hi there,
At long last I started working on my own cab yesterday, starting with this cable (I live in Europe and have SCART TV's at hand). Here's what I did chronologically:
*Got a SCART cable and a VGA cable
*Cut off one side of the SCART cable and one VGA plug from the VGA cable
*Desoldered all the wire leftovers from the VGA cable
*Cursed
*Went to a friend with a better soldering iron, mine was too big
*Cut off/desoldered all unnecessairy wires from the SCART cable
*Cursed again
*Resoldered the wire I mistakingly cut off back into place
*Soldered all the wires in the right place (including MOLEX plug and resistor) --> I used the wires from the old SCART cable
*Made sure that no wires were short circuiting and sealed everything with hot glue (figured this would be easiest to isolate all wires)
*Measured all contacts with a multimeter (they were all good)
I then installed the soft15khz program on my computer and connected my VGA graph card with my SCART (50khz) tv. Rebooted the pc and all I got as an image was a combination of following 2 videos:
and
I also tried running the soft15khz program at 25khz, 31khz and a combination of 15/25/31khz. All options gave me the same problem.
Any ideas? :s
Zebidee:
Your first video looks like you have tried to boot into something other than 640x480, like 1024x768.
Bear in mind that Soft15khz has variable performance when used with onboard chipsets (e.g. "Intel 945") - it might work with some, but not with others.
Your second video looks like you have something wrong with your sync wires or vertical hold.
The difficulty is that there are too many unknowns with your setup and hardware. You might find your solution in the Soft15khz thread. Or you might solve the problem by switching the TV inot the right AV mode. Or your cable might be wired wrong. You want some controlled variables in order to do trouble shooting - e.g. ArcadeVGA card for video output, pre-tested VGA-SCART cable, pre-tested TV etc.
orchidius:
So you're saying that a one-time builder or a first-time builder can't use this setup if he/she doesn't get it right from the first time? :s
Here are some specs that might help:
TV: Sony Trinitron KV-20WS1B
Graph card: ASUS EAX600PRO - running at 15khz with Soft15khz
resolution: 640x480
VGA-SCART cable: below the last build I tried (also tried the original build mentioned in post 1, both builds of course WITH molex plug)
http://img580.imageshack.us/content_round.php?page=done&l=img580/4853/naamloosd.jpg&via=mupload
Zebidee:
--- Quote from: orchidius on June 06, 2010, 12:46:06 pm ---So you're saying that a one-time builder or a first-time builder can't use this setup if he/she doesn't get it right from the first time? :s
--- End quote ---
Heh, I never said the "can't" word. But to solve your problems you need to work out what you know and what you don't know.
Let's assume that your TV works properly with RGB SCART.
You need to ask yourself:
- Is Soft15khz working properly with my video card & selected drivers?
- Is your cable built properly, without errors?
Most importantly, you need to work out:
- What video card have I got?
- What is my Youtube username?
- Who am I?
What I'm getting at with the last three questions is that your posted videos are from different users, with very different setups. One claims to use a laptop with inbuilt graphics, the other one claims to uses a NVIDIA 8600GS video card. However, in your post, you claim to be using an ASUS EAX600PRO. So ......... I don't really know what is going on here.
orchidius:
I have multiple personalities ;)
No really, I didn't film my own tv since the only camera that I own is really my cellphone camera... But I figured that here hàd to be people out there with the same issues who did make a video. And I was right :). So the above vids are just vids from random people that I found that are/were having roughly the same issues as I am.
As I noted before, the card I am using is most definitely an Asus EAX600PRO. It has all drivers installed (catalyst 6.5) and Soft15Khz running properly.
The issue is also not the TV itself as I tried multiple tv's with the same results today.
The issue is also not in the cable. I measured àll connections multiple time and they are all good.
I've had some valuable tips from Sailorsat which I'm gonna try tomorrow:
1) Try it at 640x240 resolution
2) Use the DVI port instead of the VGA port
Anything else I could possibly try?