“Rämixx500 is an Open Hardware remake of the Commodore Amiga 500+ mainboard, revision 8A.1.
Many Amiga 500+ computers are suffering an early death because of the built-in barrel battery that powers their internal real-time clocks. Such batteries have long exceeded their planned lives and in many cases have started to leak alkaline liquids over the mainboard, corroding copper traces and destroying components.
This damage can sometimes be repaired trivially, but many times it requires a lot of time and effort. Sometimes it adds up to other damage occurred over time and so it would just be better to have a new board built with new components to move the few critical chips over. Amiga mainboards haven’t been produced for the last 30 years, but they are relatively simple by today’s standards, thus an amateur project to make new ones was started.
There are other projects like this one out there, but none of them is Open Source and none of them comes with both schematics and board. This is a big advantage, since anyone can modify the board and make new improved versions, as long as they release their modifications it with the same license. I have come up with some ideas for improvements, feel free to help :).”