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Minigun Supergun - An Open Source Supergun

The LCD monitor I have can sync up to a PC running CRT Emu at 15khz; very useful for setting up MAME. But it doesn't sync up to the MiniGun using that cable. Probably because that monitor expects separate H & V synch and not CSync. Same monitor can't accept 15khz from a NAOMI either.

Instead, I will be using the mini DIN 8->VGA cable to pipe the signal into a Gnobes CGA->VGA adapter for my test bench purposes. If that doesn't work, then I will solder on lead wire to the RGB, VGnd, & Sync pins on the back of the card edge connector. I have to do this anyway so that I can drive CRT monitors when I am working to repair those.

All in all, very happy with this. My previous test bench was a rat's nest. Minigun alleviates much of that and allows me to be portable as well, which is great when I am helping others on their arcades.
 
While on the subject, is it possible to use breakout bnc rgbs cables to use on pvms with the minigun?
 
SabreAZ said:
While on the subject, is it possible to use breakout bnc rgbs cables to use on pvms with the minigun?
Click to expand...
The short answer is yes. I use a set of mini din 8 to BNC for my BVM.

I ordered a custom cable from https://retro-access.com/

If you need help, send me a PM.

Quick shot of the cable and it displaying on from a CPS2 to my BVM.

jrvrDuP.jpg

Hg2dJD7.jpg
 
Thanks Frank, got myself all the parts needed. Building it soon. Just waiting for the cable tho
 
I got some (advanced v1.7) PCB's this week and parts arrived for one assembly from digikey last night. I'm just repeating what others have already said but, all components fit like a glove. It fired up perfectly first try with my MVS. Thank you to everybody who made this project a success.


minigun supergun.jpg

I used AlxUnderBase's digikey BOM link. A couple notes:
  • The mean well power supply produces a super annoying high pitched note.
  • There are not enough pins in the BOM to populate the kick harness plug (‎p/n 455-1135-1-ND‎ should be quantity 6).
I have extra PCB's if people are interested in buying blank (or maybe populated) boards send me a PM.
 
the Goat said:
I got some (advanced v1.7) PCB's this week and parts arrived for one assembly from digikey last night. I'm just repeating what others have already said but, all components fit like a glove. It fired up perfectly first try with my MVS. Thank you to everybody who made this project a success.


minigun supergun.jpg

I used AlxUnderBase's digikey BOM link. A couple notes:
  • The mean well power supply produces a super annoying high pitched note.
  • There are not enough pins in the BOM to populate the kick harness plug (‎p/n 455-1135-1-ND‎ should be quantity 6).
I have extra PCB's if people are interested in buying blank (or maybe populated) boards send me a PM.
Click to expand...
Sir , the mean well it's not a good PSU for this mini ? i didn't notice , but i order 1 pin too ... :( i will make another order to have what i need when i must test this. my boards are in customs (dhl express from china to romania --- it's the worst service i've meet) . Sorry for mistake.

Ps : the BOM was modified with the correct number of pins that missed previously
 
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AlxUnderBase said:
the Goat said:
I used AlxUnderBase's digikey BOM link. A couple notes:
  • The mean well power supply produces a super annoying high pitched note.
  • There are not enough pins in the BOM to populate the kick harness plug (‎p/n 455-1135-1-ND‎ should be quantity 6).
Click to expand...
Sir , the mean well it's not a good PSU for this mini ? i didn't notice , but i order 1 pin too ... :( i will make another order to have what i need when i must test this. my boards are in customs (dhl express from china to romania --- it's the worst service i've meet) . Sorry for mistake.
Click to expand...
No reason for you to apologize. When I re-read what I wrote I see it might be interpreted as an attack. That was not my intention. I only meant to provide info so other people can make informed decisions. Thank you for providing the digikey BOM link. It helped out greatly.

I don't need the kick harness yet anyway. So those missing pins are no problem (for me).
 
Guys, besides @the Goat , someone else has a problem with the Well PSU related in this BOM ? (I already purchased this model ,but now at my home i have a HAPP psu who works awesome with all i want to play and have in my collection ^^ )
 
My mean well whines without a load. But with a load it’s fine.
 
I have the Mean Well RT-65A and RT-125A. No problems on my end but I have a MVS MV-1F, which draws more power than the other single slots.
 
@Frank_fjs The provided schematic loaded on Easy EDA. The PCB layout is there. But the electrical schematic view is not. Is there another file? Or am I missing something in Easy EDA? I've never used that site before.
 
You're not missing anything. :)

I've only done a schematic for the video circuit and that's more of a visual reference rather than a means to route the PCB.

I whipped the PCB up sans schematic, I trust myself more than I trust software. :)
 
The RT-125A generates the whine with my MV1A, I use my MV1FS instead to avoid it, it's a current draw issue.
 
Frank_fjs said:
You're not missing anything. :)

I've only done a schematic for the video circuit and that's more of a visual reference rather than a means to route the PCB.

I whipped the PCB up sans schematic, I trust myself more than I trust software. :)
Click to expand...
I see, very impressive working without a schematic!

I wanted to take a look at the audio circuits. I think one of the audio channels is polarity inverted -- at least when the minigun is in mono audio mode. I suspect this because my audio is routed through a surround sound receiver. If the receiver is in Dolby Pro Logic mode, I would expect the audio to to routed 100% to the front center channel. But instead the audio is routed 100% to the rear channel. That tells me the left and right channels are 180 degrees out of phase.

This happens with audio through the mini din port. I have not tested the 1/8 inch audio port yet. Nor have I tested with a stereo JAMMA PCB. I also have not eliminated the possibility that my Retro access SCART cable is inverting one of the audio channels -- this is the first time I've used it in anger.

edit: I had the mono/stereo switch in the wrong position.
 
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