Building a Supergun. Looking For Help.

[Damion]

I want to build my own Supergun (for a Neogeo MVS slot-1 among using it for Jamma) the one thing that seems to always get in the way is the R.G.B. to Component (NTSC) converter.

From the looks of things you can't just build one of those. which is rather disapointing. Unless someone here knows how to hack an excisting product that has one thus making it cheaper then 99 US dollars (http://www.jrok.com/hardware/RGB.html)(<Link). I want to do this as cheaply as possiable (without any real loss of quaility) So It would most certainly be worth my time to save twenty to fifty dollars.

Now I'm not any kind of engineer. But I'm pretty savy when it comes to learning on the fly. This site is somewhat helpful (http://dasfool.aroo.tv/Index.html) even though he bought a Hacked R.G.B. to NTSC converter. The links and product guide (aside from the R.G.B. converter) are pretty decent. From what I've found so far.

If anyone has any other Helpful info on Building a Supergun or Help with the R.G.B. to Componet Converter please let me know. Honestly everything seems rather easy up to the R.G.B. to NTSC converter. But the more info the better.


many thanks in advance for any and all help :D


P.S.

OK I know they're maybe other topics on this (Other then the one asking questions about buying one here on the first page) but the Search function is broke and has been for most of the time I've been here. so please forgive me if this is a redundent thread.

Also why not have a Sticky Supergun Resource thread? I'm pretty sure I'm not the only one who wants to do this.

one more thing (that is if your still reading) whats with the auto Edit R.G.B. = RGB what is it related to?

CRAP I'm sorry I didn't mean for this to end up in arcade ally. if this would be better off in the TECH Forum please move this but now that I think about it. since this is arcade ally it may be better off here I'm just not sure again very sorry

[ClubNinja]

If you can solder and understand simple circuits, then build your own using an existing chip. It's the AD725. Check out a data sheet at analog.com for more info. They actually have a whole line of 723-725, but 725 is ideal for this. Depending on how much you spend on the parts, it can be build for 5 to 10 dollars and works pretty well. Alternatively, just pick up an old Commodore monitor and splice a cable together - that's the easiest method I've found.

[Damion]

Thanks Clubninja :D

I recently hit there site about a week back for a Free Sample. It looks like I'll be getting the AD725AR sometime in feb. So this is just the chip right? I'll need to get some PCB board and go from there to get it set up?

Do they make universal PCB? I'm pretty sure between me and a friend of mine we could get one built without any complications.

BTW is the AD725AR a good version of the series?

[ClubNinja]

Just head over to Radio Shack and buy a little breadboard - it's just a grid of holes and can be used for any circuit configuration you'd like. They're only a few bucks.

The AR should be just fine, though I've never worked with it myself.

[Damion]

I've seen those! my friend had to use one while he was in collage. for diffrent PC projects.

I'll be strolling down to Radio Shack (http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=276-170) for sure. thanks again Clubninja :D

either that or I could use a tortilla-Board (http://www.seattlerobotics.org/encoder/apr98/breadbrd.html) lol

[Goblin]

Thanks Clubninja :D

I recently hit there site about a week back for a Free Sample. It looks like I'll be getting the AD725AR sometime in feb. So this is just the chip right? I'll need to get some PCB board and go from there to get it set up?

Do they make universal PCB? I'm pretty sure between me and a friend of mine we could get one built without any complications.

BTW is the AD725AR a good version of the series?

I built my own using the AD724AR last year. I did save a bit of money, but unless you understand electronics you may have a bit of trouble.

First off the universal breadboards from Radio Shack you reference will be of no use to you. They only work for through hole parts in DIP packages. The AD724AR/AD725AR both only come in SOIC packages which are surface mount parts. If you have a steady hand you can glue the device to a piece of perf board and then solder to the individual leads. Even with a fine pitch iron, I could never do that. I just etched my own board, which simplified the construction, but the board and layout introduced some parasitics so I had to play with some component values to ultimately tune the circuit to get the best picture.

In the end it works great, but the constuction is more than just hook up and go. As long as you know what you are getting into in advance you should be fine. And if you run into problems just ask.

[ClubNinja]

First off the universal breadboards from Radio Shack you reference will be of no use to you. They only work for through hole parts in DIP packages. The AD724AR/AD725AR both only come in SOIC packages which are surface mount parts. If you have a steady hand you can glue the device to a piece of perf board and then solder to the individual leads. Even with a fine pitch iron, I could never do that.

Or, he can solder on a socket adapter for surface mount parts. Granted, they're not entirely common, but they exist. Also, soldering leads to each pin isn't terribly difficult (though not insanely easy). Regardless, this is all very doable and I'm sure he'll be fine.

[racecar]

@_@ @_@ @_@
what??? can i get some pic's of the finish RGB converter ??..................iam currently working on one too
.

[Richter]

http://crazearcade.com/catalog/product_info.php?cPath=25&products_id=156 cheaper than the jrok