Atari ST 60Hz LCD External Scandoubler

[bid]

Anyone seen this "Atari ST 60Hz LCD External Scandoubler" on eBay yet?



http://www.ebay.co.uk/itm/Atari-ST-60Hz ... 828wt_1252

Wondering if this is useful to anyone? Cheers, Bid

[bid]

Also see http://www.scandoubler.info/

[DarkLord]

Interesting...but I still want one that will fit *internally*.

[Dal]

It's one of these in a project box.

It looks good. Price may appear steep, but I know from experience doing this kind of thing how long it actually takes to prepare a project box. Add the soldering of all those lines in that fiddly 13-pin connector and test it all.

I see he's decided to draw power from the ST itself so he's given himself the added job of making that little joystick through port - I wonder if that really leaves enough room to plug a joystick into without the weight on the ST putting pressure on the port though??

[Dal]

Just thinking about it, it's possible to draw a 12v line from the monitor port to power the board (it's rated 2v-12v). Then there's no need to draw from the joystick port - of course it depends a lot on how he took the sync.

[spiny]

but I know from experience doing this kind of thing how long it actually takes to prepare a project box. Add the soldering of all those lines in that fiddly 13-pin connector and test it all.

mine is a lot less tidy than that guys

[Amiga_Andy]

Just thinking about it, it's possible to draw a 12v line from the monitor port to power the board (it's rated 2v-12v). Then there's no need to draw from the joystick port - of course it depends a lot on how he took the sync.

The 12v line from the monitor port is not strong enough to drive the GBS boards safely, it needs at least 2a where as the Atari only supplies around 100mA.

[Shredder11]

The guy making this lives only two miles away from me, but I do not know him.

[wongck]

The guy making this lives only two miles away from me, but I do not know him.

Go ask for a demo of the device. Then you will know him.

[Dal]

Just thinking about it, it's possible to draw a 12v line from the monitor port to power the board (it's rated 2v-12v). Then there's no need to draw from the joystick port - of course it depends a lot on how he took the sync.

The 12v line from the monitor port is not strong enough to drive the GBS boards safely, it needs at least 2a where as the Atari only supplies around 100mA.

Oh yes, 2A would be a bit rich certainly. Didn't see the board was that hungry at first

[rocket-dog]

The guy making this lives only two miles away from me, but I do not know him.

Go ask for a demo of the device. Then you will know him.

+1

You can be our roving reporter.

Perhaps somebody should email him so we know he knows we exist?

I have one of those other boxes off ebay from China and it is OK, but only just OK. My SCART experiments aren't going to well with only my parent's 32" Sony giving me a decent picture. I can't fit that on my desk and secondly my parents might just notice their TV is missing (that is if I could come up with some way to smuggle out of their house.)

[wongck]

(that is if I could come up with some way to smuggle out of their house.)

Go Sainsbury, get some boxes, paint them to colour of the TV, make the swap when they are not looking.

[Amiga_Andy]

Go Sainsbury, get some boxes, paint them to colour of the TV, make the swap when they are not looking.

lol!

[CiH]

Spiny, you've re-used an old TalkTalk modem box for your scan-doubler?

[simonsunnyboy]

Curious question, do these scandoublers only work with 60Hz output or do they happily eat 50Hz and overscan modes of the ST as well?

[nativ]

Spiny, you've re-used an old TalkTalk modem box for your scan-doubler?

Old...... I have one just new!

The ST can get online now too eh Spiny!

[spiny]

Spiny, you've re-used an old TalkTalk modem box for your scan-doubler?

yeah, had a spare one and it's the right size

[spiny]

Curious question, do these scandoublers only work with 60Hz output or do they happily eat 50Hz and overscan modes of the ST as well?

I've been watching loads of demos using mine and it appears to work perfectly with overscan, sync scrolling, split screen res etc

[Amiga_Andy]

So, getting back on subject...

Is anyone interested in this scandoubler? I notice there are no bids on it yet!

[simonsunnyboy]

Curious question, do these scandoublers only work with 60Hz output or do they happily eat 50Hz and overscan modes of the ST as well?

I've been watching loads of demos using mine and it appears to work perfectly with overscan, sync scrolling, split screen res etc

Thanks...I ask because I have heard that professional made scandoublers are flaky to work and often don't get along with the ST video signal.
I once bought one to test and it didn't work well (with Composite video input that was).

[Amiga_Andy]

I have heard that professional made scandoublers are flaky to work and often don't get along with the ST video signal.
I once bought one to test and it didn't work well (with Composite video input that was).

As long as you combine the hsync & vsync signals together and invert the result then it should work fine on all ST variations.

Only the STf models have composite video out, the others have composite sync on the same pin which is not the same thing! Also the signal is negative whereas most converters expect a positive signal, so inverting is required regardless! As the listing says it works with all ST models, I suspect this is what has been done.

[Dal]

As the listing says it works with all ST models, I suspect this is what has been done.

Suspect? Reading the posts above, I had perhaps wrongly made the assumption that this was your item.

[Amiga_Andy]

As the listing says it works with all ST models, I suspect this is what has been done.

Suspect? Reading the posts above, I had perhaps wrongly made the assumption that this was your item.

No mate, I have tried this with both the Amiga and ST on the GBS-8200 boards, worked great on the Amiga straight out of the box, ST was a nightmare beyond my abilities due to the circuitry required. Best I ever achieved was directly attaching hsync and vsync together and reducing the voltage using resistors, which sort of worked but not very well, and never did work out how to invert the signal.

Would be interesting to look inside the box and see how it has been achieved though!

[Shredder11]

Ahhh you mean http://myworld.ebay.co.uk/andythepcfixer/

[Amiga_Andy]

Ahhh you mean http://myworld.ebay.co.uk/andythepcfixer/

This guy it seems to have done quite a trade in Amiga scandoublers judging by his feedback, maybe he's just branching out!