So I thought I'll let people know I have been working on a HAT for the Raspberry Pi, to allow easier implementation of a four player arcade with revenue service capabilities.
I have a YouTube video going over the circuit and PCB design.
And the Arcade HAT Schematic and PCB, with Gerber's can be found here https://github.com/Celcius1/RPi-Arcade-HAT
The control input is similar to that used on one off Ben Heck's build from a few years back, when I get a chance I'll also write the relevant config files need for the inputs.
But the board has on it a Coin Pool, so when a four player game is being emulated instead of needing individual coin/note acceptor's, if being put into revenue service, you only need one set, not one for each player. I was going to use an ATMega328P but supplies are hard to come by and the ones i bought from a Chinese seller on eBay, only to find out they were fake. So I designed the coin pool using digital electronics instead.
So the build video is now up on YouTube, I'll be doing another video when I go over the testing of the stack but I'm a little short on money at the moment, so until I can buy a 24V supply I'll have to wait to do testing, it will also be my first time using my Hantek DSO hopefully I can figure out how to use it, as it has been more than 10years since I last used a CRO so yeah never used a DSO, at TAFE I was using a CRO!
Edit: I started working on this circuit back in December last year when ATMega328 were out of stock, and decided to check supplies of ATMega328 only to find out they are back in stock, so if that is the case should I do a new version of the board using the MCU as originally planned.
Edit 6/8/23: So the newest build video is up
In that video I go through the build of the board, and you'll see i managed to fix a few design issues.
I'll have another video coming out in the coming days with going over the programming of the micro controller