I'm building some Donkey Kong replica cabs with another forum member later this year and need a number of DK-Jamma adapters for some original PCBs and my DK Repro boards when they're done.
The Mikes Arcade adapters are good but it gets quite expensive when you need 10 of them so I set about making them myself. The first revision uses the same circuit for the video inversion and audio amp but the power rails have been beefed up and a ground plane added top and bottom.
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Kaizen
I'm building some Donkey Kong replica cabs with another forum member later this year and need a number of DK-Jamma adapters for some original PCBs and my DK Repro boards when they're done.
The Mikes Arcade adapters are good but it gets quite expensive when you need 10 of them so I set about making them myself. The first revision uses the same circuit for the video inversion and audio amp but the power rails have been beefed up and a ground plane added top and bottom.
https://drive.google.com/open?id=199Iug2lf3BiC44aGc1RJg73bP7SUgKf4
The boards are currently in production and should arrive early next week.
Once tested, I plan to add a connector for direct feed for the guys that want to stream their games.
This will include a sync cleaner and most likely a Scart connector or RCA connectors for RGBS out.
The PCBs cost $7 (or $11 for gold finger edge connector) and the cost of components is around $12 plus a 44 pin edge connector.
The project will be open source if anyone wants to get their own boards fabricated but will have some spare if someone wants an unpopulated PCB.
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