I am in the process of making a universal supergun and I want my supergun to be able to plug and play with the Jameco SC200 power supply, but I noticed that it doesnt offer -5V output. I want my supergun to be as universal as possible, so how important is not havin the -5V output?
What is the -5V needed for?
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FusionITR said:
What games are you looking to play????
My guess is that not having a -5 is less important than the fact that the SC200 will be underpowerd for some aplications....
norton9478 said:
I want it to be compatible with any jamma device.
It doesnt matter that the SC200 is underpowered because like I said I want it to be COMPATIBLE with the SC200, but not making it a requirement to use. Like if you where to have my supergun and wanted to play something that required higher amps, you could just use a different power supply.
What I am worried about tho is not wiring my system to support -5V.
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FusionITR said:
Aight......
No setup will ever be compatable with EVERY jamma device.......
This setup should be compatable with MOST Jamma devices....
I'd use an 8 Pin Din power Input rather than a 5 pin.... Take one of the pins not used by the sc200 and wire that to the -5v on the jamma harness....
That way, it will be easy to incorporate a different PSU in the future.
Gummy Bear
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It's my understanding that the -5v line is for coin-mech's and other such tomfoolery.
I don't think you need to worry about it (unless I'm wrong, of course).
The SC200 would crumble and die if it tried to fuel a 6-slot.
Just get a proper arcade PSU, mate.
It's not as pretty, but it's all you'll ever need.
I don't think you need to worry about it (unless I'm wrong, of course).
The SC200 would crumble and die if it tried to fuel a 6-slot.
Just get a proper arcade PSU, mate.
It's not as pretty, but it's all you'll ever need.
ttooddddyy
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FusionITR said:
Only a few boards sets use the -5 volts, notably the early 90s midway games like Motral Kombat series and NBA Jam
The -5 volts supplies the audio op amp stage so no - 5 = no sound on these games. I wouldnt worry about it at this stage but as norton said use a psu socket which caters for the extra rail if required in future. I prefer XLR sockets to din.
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Gummy Bear said:
It's sometimes used by op amps in the audio section on some boards like Mortal Kombat or Smash TV (I've spotted another example yesterday but can't remember what game it was). Basically you don't get sound if -5v is not wired.
Gummy Bear said:
There exist other desktop PSUs that would be powerful enough for a 6-slot but they don't cost 10 or 20 bucks...
Gummy Bear
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ttooddddyy said:
The XLR is a nice socket (release button, ttooddddyy!
) but not really necessary.Plus, I think they are only available with 3 pins.
A 5 way DIN will do the trick nicely.
It has done on my 6-slot for a long time.
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Gummy Bear
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MKL said:
I wouldn't skimp on a PSU, mate.
Arcade hardware all the way, I say.
But that's just me.
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Skimp? A 5v/10A desktop PSU costs as much as 2 or 3 arcade PSUs...
Arcade PSUs are not a good choice for consolized units, not only for cosmetic reasons but more importantly because they have the AC terminals exposed to touch
They're only meant to stay inside cabs.
Arcade PSUs are not a good choice for consolized units, not only for cosmetic reasons but more importantly because they have the AC terminals exposed to touch
They're only meant to stay inside cabs.
Gummy Bear
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I suppose that depends on the PSU....MKL said:
MKL said:Arcade PSUs are not a good choice for consolized units, not only for cosmetic reasons but more importantly because they have the AC terminals exposed to touch
They're purpose built, highly reliable, don't get hot, don't need a fan and will power any arcade board reliably.
The MVS and any other arcade board are only meant to stay inside a cab.
The exposed nature of the PCB makes them potentially dangerous and not to be used by everybody.
You would be a fool indeed if you consolized an MVS and then went and touched some live terminals on a PSU.
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I'm not saying they don't work well but that they're potentially dangerous: for instance the live terminals could be touched by little children, pets or even you if one day you're absent-minded, drunk, etc. You may want to take the risk but how about other people? Would you make something like that and sell it?
Gummy Bear
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FusionITR said:
What are the pinouts for the SC200's DIN plug?
Are there 2x GND, 1x +12v and 2x +5v?
Gummy Bear
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MKL said:
Very well MKL, I concede the point.
They are potentially dangerous.
I wouldn't leave any kind of exposed PCB lying around if there were kids about, let alone a PSU with exposed terminals (more for the sake of the board than the kids I do confess).
Unlikely that I would get fried by it as I am seldom absent-minded and never drunk.
Yes, I would make something like that and sell it.
I would make sure that whoever bought it knew not to touch live terminals (though it goes without saying).
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FusionITR said:
I would not recomend that........
Another option would be to just wire the -5v on the harness to a 3.5mm power jack.
At a later point, you could aways use a bigger PSU. Wire the +5v, +12v and ground via the 5 pin and the -5v via the 3.5 mm power jack...
.................
XLR is the 3 pin style used for mics right?
I have been thinking about going to that for +5,+12 G.
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norton9478 said:
That's what ttooddddyy does.
Reportedly with great success.
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Gummy Bear said:
I like those because they look realy slick and professional... Plus they are bigger.
I've seen 4 pin ones.... But they are not as common... SO getting cheap and applicable parts for it is not as easy...
ttooddddyy
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Gummy Bear said:The XLR is a nice socket (release button, ttooddddyy!
Plus, I think they are only available with 3 pins.
They come with up to 7 pins
http://futurlec.com.au/Plugs-XLR.jsp
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Gummy Bear
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ttooddddyy said:
I stand corrected.
The XLR knows no bounds!!
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If you have a game bopard suchas Robotron or Defender, they do use dynamic RAM so the -5 volts IS required. A similar board example is Spiders. Without the -5 volts, you WILL burn all 24 ram chips. It is NOt a fun job replacing all of them....
ttooddddyy
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Nightmare Tony said:
Thanks for the advice NT, I would have connected up without the -5 and cooked the lot.
Most games from Midway/Williams do need the -5V. Starting with Midway Y-unit PCB's(SmashTV,Total Carnage,MK,T2) they require -5V for audio as mentioned. This requirement follows through the Killer Instinct PCB's, T-unit(NBA Jam, MK2), Wolf Unit(MK3/UMK3,Rampage,OpenIce,NBA Hangtime), X-unit(RevolutionX), V-unit(CruisinUSA,CruisinWorld,Offroad Challenge,War Gods), Zeus(MK4, Invasion),Zeus2(Cruisin Exotica), Seattle hardware(Wayne Gretzky Hockey, Blitz, California Speed, Hyperdrive, Carnevil), Vegas hardware(Gaunlet Legends/Dark Legacy, War:Final Assault, Blitz2K) Flagstaff hardware(Rush, Rush the Rock...though not 100% sure), well...pretty much any Midway game really