New Amiga RGB To Component Video Adapter FINISHED!!!

[Calimeiro]

Maybe I didn´t explain it correctly:

You dont need to actually have a scart tv. You use an Amiga to scart cable and then a scart to RGB converter.

$14.64 + $9.17 = $23.81 including shipping

http://www.ebay.com/itm/COMMODORE-AMIGA-A600-A1200-GOLD-OFC-VIDEO-SCART-CABLE-2M-/320528969660?pt=UK_Video_Games_Cables_and_Adaptors&hash=item4aa103efbc

http://www.ebay.com/itm/RGB-SCART-to-Composite-COMPONENT-VIDEO-AV-TV-ADAPTER-HD-CONVERTER-/220833672632?pt=US_Video_Cables_Adapters&hash=item336ab66db8

So my question remains: what is the difference?

Please explain, how to clutch to male SCART plugs together. I feel dumb reading this.
Only Amiga makes it possible? :hammer:

[Calimeiro]

Yes, it is much better and cheaper to build the cable on your own.
 
My post was not targetted at offering a solution but to ask about the difference in features/price. So any clue, anyone?

The difference is the signal. SCART is for 50Hz PAL-TV. Not NTSC 60Hz. The SCART-TV got the circuitry to accept independent r-g-b with single sync line.
When doing Composite or Component Video, your adapter has to deal with correct conversion and proper signalling as all is mixed into one signal. Cvideo is a simple interface and picky to incorrect synchronization. Sync signal has to be improvised. Picture will be blurry in most cases, as the signal get "damped".
Component video carries sync signal via color. You have to make sure, signal is not getting lost during refresh.

As this was "kjmann", who has no creditibillity to me, anouncing this on a.org, lemonamiga, atariage in august and september, without pictures of the "finished and ready to ship" product, i doubt there is anything worth talking about.

Edit: From the few infos on this topic, he bought himself a tv with pal interface. So this is completely useless for north-americans and/or users with NTSC only.

[Calimeiro]

jd, your link to ebay is dead.

[Calimeiro]

VGA is not applicable here if it means output from a vga card (31 kHz) versus tv (15 kHz).
There are devices (ab)using vga 15-pin connectors for different signals.
TVs with vga in, do convert themself from 31 to 15 kHz.
Amiga does not provide higher freqs then tv standard.

If your box is like this one attached below, and if it is actively converting regarding both tv standards, you should be fine with amiga rgb-scart -> box -> tv compoment.

[Calimeiro]

They do if you have ECS or AGA and use the DblNTSC or DblPAL modes.  Probably not applicable to your discussion here, but just sayin'.  

Of course, you are right, i forgot about these modes. (me standing in the corner of shame)

[Calimeiro]

jd, your box looks like the "cheaper" version. What's wrong with the output?
Scambled? Distorted? Moved?

If it's a color mismatch you might check out the internal, there should be some screws for adjusting. You need a small screwdriver with "cross"-tip (i think it is named phillips screwdriver in the states)
You have to open the box for that.

If there is no output at all: Have you checked your rgb->scart cable?

[Calimeiro]

Potential pitfalls:

SCART-cable is missing signal on of the following pins
16  rgb mode
8   a/v selector
20  composite sync (voltage too high)

check with voltmeter if possible.

////////////////

Cable might be ok, but miggy has corrosion on pin
10
22
23

///////////////////

Please check if cable has resistors to those lines for voltage correction, if there is no resistor swap cable for better one.


Well, and finally, the box might be produced in october (during play-offs) :lol:
Check with other machine than your miggy.

I don't want to force you to by a new, not until it is clear what's the culprit here

I get no picture at all on the two displays that I tried. But, there is a  "signal indicator" symbol that flashes briefly on both displays as if  it is *trying* to sync a signal.

It's most likely they are waiting for signal from box (box to display acknowleged) but box don't get signal from input.

[Calimeiro]

My Amiga to SCART cable works fine with my SCART to HDMI box. I have no reason to suspect it, but I know there can be differences in the way the cables are made.

A/V mode switch or 4:3, 16:9 selector is not part of hdmi, hence box is working with your cable, but composite converter not.

I don't think sync is a problem as that signal has been decoded successfully in your hdmi converter. Without you wouldn't get a satisfying picture on screen.


Addendum: To my knowledge, a tv or monitor built with pal/ntsc tv interface can handle 256 (240) line mode (512/480 i). That is part of the specifications. Modern gfx cards and some Monitors no longer deal with  image date lower than 640*480 (31kHz). Output has to be doubled to be accepted (upscaling, frequency doubling).
Using interlace doesn't change a thing, as signal remains the same (15kHz).

You need Multiscan or DoubleNTSC mode to check. They are in the 30kHz ballpark. Those aren't RGB PAL/NTSC conformant and none of the gaming consoles from good old days uses other than low freq tv out. That's what the converter is made for.

[Calimeiro]

Scart pinout



Check on cable (not box )
Pin 20 --> should be less then 3.0 V
Pin 16 --> 5.0 V
Pin 8   --> 12.0 V

Final test Pin 13 on amiga sub-d 23pin should be wired to pin 18 scart only, no other ground. if it is grounded to shielding(common ground) or all other ground, isolate or cut and rewire.

i hope this will help

[Calimeiro]

Oops, bad linking.


Yes, connect cable to miggy or you don't get anything interesting

[Calimeiro]

If it's true, then it's simple:

jdryyz wrote his cable was working with his hdmi converter.
the scart converter is supposed to ignore all but rgbs.
no picture = scart converter malfunctioning

But, isolating a/v mode on scart cable makes my tv staying black. cutting everything but rgbs then tv ignores the cable and displays standard tv channels.
i do not know how his converter is working. measuring the cable would allow to identify the problem if all signals are on, because then it is definitly the box, that refuses to work. that was the idea behind.

[Calimeiro]

Any working video source will do.
Like:

sat-receiver
vhs-recorder
dvd/br-player
game console
home computer

As long as these devices are built to support tv output and there is a working cable.

If you're no hermit you might find one in your neighborhood :lol:
or look for retro gaming groups, meetings.

[Calimeiro]

You asked for a method to test your box (converter).

It is not about devices with scart interfaces, but video sources that have rgb out and can be directly connected to tv.
Game consoles are best bet.
 
Have a look at : http://retrorgb.com/systems.html
and http://retrorgb.com/rgbguide.html for introduction.

Some of the home entertainment stuff has additional rgb out. They are sold worldwide with minor modifications for local markets.
Those may have a 9 or 15 pin sub-d CGA connector (VGA connector).

Next way is to take a component to rbg cable. That would be somehow contradictionary, but all you need is a signal you can fed to the box. I don't know each and every type of tv gear sold in the states. You have to solder your own cable, i'm afraid.

If all is a no go i'm sorry, i have no more ideas.

[Calimeiro]

I would rather not acquire a game console to test out the converter, though, but that is a good way rule out my *Amiga* as a source of the problem.

No purchase. Ask friends, co-workers, neighbours, family members, if they got an old game console stashed away (or old home computer).