biggestsonicfan
Professional
Have you ever wanted to run your Model 1/2/3 board outside a cabinet? Do you want options when it comes to inputs for that board? Well look no further!
Introducing the PASSIVEGUN! A Supergun with the Sega Model 1/2/3 in mind. Made entirely of through-hole, passive components, this board will allow you to power your Sega board either with a USA style 44-1035-00 or equivalent PSU or a standard 24-Pin ATX Power supply.
You want controls, we got options! Your standard Neogeo DB15 inputs, mounts for two Undamned decoders to use your favorite pads and sticks, or for testing purposes the board itself has every input you might need! The inputs from this board output to the Sega Model boards using the Arcade Projects JAMMA-Extender pinout!
For smooth video options, the video is tied to ground with 470pF ceramic capacitors and 475 Ohm resistors for the best, line free, picture quality with your 24Hz monitor or scaler in mind.
Sega Model boards will be powered via a MiniFit Jr connector which splits across all 20 power pins on Model 1/2 boards with one extra 5v and GND pin to let you wire up whatever you want (your GBS-8200 maybe?), and using ATX you have a 2nd MiniFit Jr connector which outputs the 3.3V necessary for Model 3 boards. You can also monitor your voltage with the onboard voltmeter (not pictured, it goes in the hole).
To keep your area nice and tidy and reduce the number of dangling cables, the inputs use an IDC-34 cable while the audio and video uses the same connector as the Sega Megadrive 2 pinout!
There's no pricepoint on this yet as I have to account in the extensive labor that will go into this thing (a lot of solder and a lot of cable making), but this is something I've wanted to make for myself for quite some time. I decided to add 3.3v from ATX PSUs mainly as a way for Model 3 owners to have an option but be warned I have no way to actually test a Model 3, I can just make the wiring for it as it's documented. I have a good feeling that a beefy 550w ATX PSU will put out enough on the 5v and 3.3v rails to be able to power one though.
Not all of the component routing has been completed yet, as I wanted to throw the idea out there to get some feedback before I fully commit to this project. I don't know how viable this is as a product to sell but if I can get 5 boards made and at least 2 sales, I think I have enough justification to put it into production.
What do you all think?
Introducing the PASSIVEGUN! A Supergun with the Sega Model 1/2/3 in mind. Made entirely of through-hole, passive components, this board will allow you to power your Sega board either with a USA style 44-1035-00 or equivalent PSU or a standard 24-Pin ATX Power supply.
You want controls, we got options! Your standard Neogeo DB15 inputs, mounts for two Undamned decoders to use your favorite pads and sticks, or for testing purposes the board itself has every input you might need! The inputs from this board output to the Sega Model boards using the Arcade Projects JAMMA-Extender pinout!
For smooth video options, the video is tied to ground with 470pF ceramic capacitors and 475 Ohm resistors for the best, line free, picture quality with your 24Hz monitor or scaler in mind.
Sega Model boards will be powered via a MiniFit Jr connector which splits across all 20 power pins on Model 1/2 boards with one extra 5v and GND pin to let you wire up whatever you want (your GBS-8200 maybe?), and using ATX you have a 2nd MiniFit Jr connector which outputs the 3.3V necessary for Model 3 boards. You can also monitor your voltage with the onboard voltmeter (not pictured, it goes in the hole).
To keep your area nice and tidy and reduce the number of dangling cables, the inputs use an IDC-34 cable while the audio and video uses the same connector as the Sega Megadrive 2 pinout!
There's no pricepoint on this yet as I have to account in the extensive labor that will go into this thing (a lot of solder and a lot of cable making), but this is something I've wanted to make for myself for quite some time. I decided to add 3.3v from ATX PSUs mainly as a way for Model 3 owners to have an option but be warned I have no way to actually test a Model 3, I can just make the wiring for it as it's documented. I have a good feeling that a beefy 550w ATX PSU will put out enough on the 5v and 3.3v rails to be able to power one though.
Not all of the component routing has been completed yet, as I wanted to throw the idea out there to get some feedback before I fully commit to this project. I don't know how viable this is as a product to sell but if I can get 5 boards made and at least 2 sales, I think I have enough justification to put it into production.
What do you all think?
