Help with I@N's Internal VGA Box!!!

mrstywall · Post by **mrstywall** » Wed Jul 02, 2003 11:07 pm

Could someone tell me all the parts I need to make this and where I can purchase them in America. I don't think Radio Shack has that 20 pin chip that the VGA Box needs. And where can I get the monitor input thingy at? You know the thing that the monitor's cord goes into.

Synlor · Post by **Synlor** » Wed Jul 02, 2003 11:24 pm

You can get everything from radioshack, including the chip and a monitor connector.... you may have to order online though. Be careful, when I tried it, it broke the video on my dreamcast

. I couldn't fix it at all... I had to buy a new mobo for it.

mrstywall · Post by **mrstywall** » Wed Jul 02, 2003 11:40 pm

Could you make a list so i can print it out and go to radio shack tommorow and pick it all up?

Synlor · Post by **Synlor** » Thu Jul 03, 2003 12:01 am

Um... I dunno exactly if I should, I'll just post a schematic type dealy (all credit goes to boolean3k, i got this around august, but I'm slow and lazy to get things up >_<... plus I have no money to build this and make a guide for devcast, but thats another story)

bizzle · Post by **bizzle** » Thu Jul 03, 2003 12:07 am

That looks pretty easy. If I didn't already have a VGA box, I'd build one.

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 12:23 am

Well could you explain it to me? cause I can't read schematics very well.

sonick · Post by **sonick** » Thu Jul 03, 2003 12:50 am

Uhm, snylor already did it... if you can't read that, then i dont think you should be tryin to make your own VGA box

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 12:58 am

never mind i got it, where can i get a small circuit board for this?

beerbaron · Post by **beerbaron** » Thu Jul 03, 2003 2:20 am

Would it be possible to output to a TV and a VGA monitor at the same time?

Also what are pins 4,10,11,12, & 13 on the DC A/V Out ?

Matt · Post by **Matt** » Thu Jul 03, 2003 9:59 am

Would it be possible to output to a TV and a VGA monitor at the same time?

Yeah just hook up the appropriate pins from the dc properley

Also what are pins 4,10,11,12, & 13 on the DC A/V Out ?

Gamesx.com

where can i get a small circuit board for this?

Use stripboard, It can be tricky to get your head round it sometimes though

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 11:19 am

Won't I have to find an extremely small circuit board in order to fit it inside of my DC?

Matt · Post by **Matt** » Thu Jul 03, 2003 11:52 am

You might be able to cram it on to a piece of stripboard

sixteen-bit · Post by **sixteen-bit** » Thu Jul 03, 2003 12:43 pm

mattthemodder wrote:
Would it be possible to output to a TV and a VGA monitor at the same time?
Yeah just hook up the appropriate pins from the dc properley

You can't. When the DC detects a VGA cable connected, it switches video output modes to a vertical frequency of ~31KHz, horizontal of 60Hz (Standard VGA spec). TV's use ~17.5KHz at either 60Hz or 50Hz interlaced.
The two signals are incompatible so while you can connect the DC to both displays at the same time, only one of them will actually give a picture.

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 1:29 pm

Okay thanks! I'm gonna get started on mine today!

beerbaron · Post by **beerbaron** » Thu Jul 03, 2003 1:30 pm

sixteen-bit wrote: You can't. When the DC detects a VGA cable connected, it switches video output modes ...

In the VGA box plans posted above there is a VGA select switch. Is this how the Dreamcast detects to turn on the VGA signal, or does it turn on the signal due to a VGA cable being attached like you said?

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 1:57 pm

Has anyone made an internal or have pics of an internal vga box inside of a DC?

sixteen-bit · Post by **sixteen-bit** » Thu Jul 03, 2003 2:21 pm

beerbaron wrote:
sixteen-bit wrote: You can't. When the DC detects a VGA cable connected, it switches video output modes ...
In the VGA box plans posted above there is a VGA select switch. Is this how the Dreamcast detects to turn on the VGA signal, or does it turn on the signal due to a VGA cable being attached like you said?

In a cable with no switch, there will be a "loopback" wire telling the DC a VGA monitor is connected and to switch to VGA. On a switched cable, this wire is switched so you can chose to switch back to TV mode without having to unplug the VGA cable (this is presuming you build TV hookups into your cable)

mrstywall · Post by **mrstywall** » Thu Jul 03, 2003 2:50 pm

how much does it cost to make this total?

Synlor · Post by **Synlor** » Thu Jul 03, 2003 5:53 pm

sixteen-bit wrote:
mattthemodder wrote:
Would it be possible to output to a TV and a VGA monitor at the same time?
Yeah just hook up the appropriate pins from the dc properley
You can't. When the DC detects a VGA cable connected, it switches video output modes to a vertical frequency of ~31KHz, horizontal of 60Hz (Standard VGA spec). TV's use ~17.5KHz at either 60Hz or 50Hz interlaced.
The two signals are incompatible so while you can connect the DC to both displays at the same time, only one of them will actually give a picture.

Thats what I think somehwo broke me dreamcast before

..... The vga switch wasn't working or something like that, and I hooked it up to the tv, wham, bye bye video >_<.

mrstywall · Post by **mrstywall** » Fri Jul 04, 2003 1:26 am

Dang, yo you got any tips for soldering? cause I kinda suck at it and I don't wanna mess up when i start this project, and I have a soldering gun. (Which I hate!)