New Amiga RGB To Component Video Adapter FINISHED!!!

[mindprober]

Hope you are able to secure some DB23 connectors rather than hack DB25s.  

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Just my guess, but the intent of this is to eliminate the whole SCART part altogether (Amiga RGB to component). I'm sure there will be some electronics in between.

Amiga users in Europe have the advantage of having TVs that can handle the Amiga 15KHz signal natively with just the correct lines connected through a SCART cable.

Again, just my guess-- this new device is aimed at the North American crowd whose best option for non-scandoubled/flicker fixed output is to go the way of component.

I am especially interested in this new device because I have had no luck with the adapters currently available.

[mindprober]

I'm not sure who you're responding to but in my case, I do not think that will work. The first cable is fine if: 1) I have an A600 or A1200 with color composite out and a TV with a female SCART connection.


The second adapter seems to be a very simplified form of the converter here:


http://www.ebay.com/itm/370695549240?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT


but instead designed for game consoles with female SCART connectors. They then go straight into the component input on their TVs.


In either case, SCART is still involved and I strongly suspect the original poster is describing a cable with an Amiga 23 pin RGB connector--> some electronics --> component video

If only kjmann can step in and confirm. Hope it isn't another vapor project.  

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?

[mindprober]

I am was going to say the same as well. Does such an item even exist? Search yielded no matches.

I'm wondering if this simple connecting of lines (from Amiga to SCART then component) will be enough, though. Probably will be for TVs sold in Europe. But then, why use component in this case if you already have a straight path to SCART? Unless, component has some other advantage.

Again, in my experience using the cables and devices already described, I am not getting a component signal output that is compatible with my displays. Something involving the type of synch, I believe.

Perhaps this is how the original poster's concept differs from what is already available.

Gulliver's solution offers two male SCART plugs so you would also need a "gender bender" in between. It is really much better to make a SCART free proper Amiga Video to component RGB cable.

[mindprober]

Somewhere in your post is the root of the problem I am having. I *am* able to send both NTSC and PAL signals to an LCD display that supports both just fine over VGA. I am having some difficulty with using VGA and believe going component will solve that for me.

Right now I am using a typical Amiga RGB to SCART cable. The SCART connection then goes into one of these:

http://www.ebay.com/itm/370695549240?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and then from there to the component input on my display. The display does appear to have problems synching with the signal. Can my converter box be modified to send a compatible signal?

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.

[mindprober]

Sorry, I will correct that when I get access to eBay again.  Before that, I can tell you this is common SCART to Component converter box.

jd, your link to ebay is dead.

[mindprober]

Edit: eBay link above corrected.

~~~~~~
Ahh....but this is a special situation where my Dell U2410 and Sharp TV both support 15Khz over VGA. I felt it was appropriate to mention the VGA part for that reason.

I should also mention that the monochrome output from my Amiga 500 going into the Dell U2410's GREEN component in produces the exact image I wish to get...only it is monochrome, of course.

Yes, that box is similar to my own and it I believed it was going to work also, but no go.

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.

[mindprober]

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.

I was curious about the image of the box you showed. I have seen that one before available from a UK dealer. See here:

http://cpc.farnell.com/1/1/32863-scart-rgb-yuv-convertor-csy-2100-cyp.html

And, yes, for a higher price. Since I already paid a decent amount for the "cheap" one with the full expectation that it would work, I would be hesitant to purchase a more expensive one. If I only had some reassurance from other user's success, that would change my mind. Then I can return my box for a refund.

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.

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?

[mindprober]

That's interesting because when I was using the VGA connection, both my displays say I am sending a 480i signal. Is the native 15KHz Amiga signal really 240p even if I am using screenmodes with a higher resolution?

I did not check what the displays indicated using the monochrome ouput of the A500 but that signal is received very nicely. If the Amiga RGB is actually 240p, wouldn't that mean the monochrome would be also?

I will experiment with an interlaced workbench screen and see if that changes anything.

Many modern TV's cannot handle 240p. If you set your workbench disk to an interlaced 15khz mode and that works, then you'll need something that scan converts 240p to 480p.
 
 It caused problems for some wii virtual console & ps3 psn games.
 
 You can't convert to 480i because it would upset the timing.

[mindprober]

I tried using an interlaced NTSC Workbench. It still did not display an image.  

[mindprober]

Interesting. The cable is from AmigaKit and it is made to order. I suppose something could have gone wrong.

I do have a voltmeter, but honestly, I would need more guidance on how to check the items you mention. Perhaps I need to find a pinout diagram for both sides.

Unfortunately, this is the only REAL Amiga I have. Before being pulled out of storage that it was in for approx five years, it was used on a Amiga-compatible CRT monitor without problems. It was also stored in the original packaging in a cool, dry place. I don't think any corrosion is involved.

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


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

[mindprober]

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.

Good to know. At least that can be ruled out.

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.

Multiscan and DblNTSC require an AGA machine, correct? I only have the A500.


So with your help, I can examine my cable for faults. If the problem points there, I know another source for one.

[mindprober]

I'm still OCS.    I had a reason to stay there long ago. Not so today, but I see no compelling reason to upgrade at the moment, especially for screenmodes I doubt I will ever use.

No, as long as you have the ECS Denise (can be bought on ebay for under $20, another one of my highly recommended upgrades, along with the 3.1 ROM).  Why everyone doesn't upgrade their machines to "the latest and greatest" when components can be had for so cheap, I'm still facepalming about.  Sorry, /OT rant over!  

[mindprober]

I see your imbedded image link when quoting you but it did not show up in the original post. Weird.

Silly question, but if you are looking for correct voltages, I assume you want the DB23 side plugged in and the Amiga turned on before I check the SCART side?

In that event, I had better be careful where I am sticking the voltmeter probe.  

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

[mindprober]

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

I figured but it doesn't hurt to be certain today given my diminishing attention span.