Neo Geo to Sega Genesis / Megadrive / Master System controller adapter
thingiverse
An enclosure for this open source adapter PCB can be found here: https://oshpark.com/shared_projects/qSqtcGAw. A standard DB15 male connector is used for the Neo Geo half while a female plug end from a Sega Genesis / DB9 extension cord provides the necessary connection. The strain relief from an unused male end is salvaged and utilized in this setup. If you prefer to take a different approach, feel free to modify the enclosure accordingly. Additional components that may be required include a mini slide switch SPDT to toggle between Megadrive/Master System mode: https://www.aliexpress.com/item/32796706769.html. Four 2.5m 8mm screws are also necessary for securing the enclosure in place. To assemble this adapter, begin by placing the DB15 connector and slide switch onto one enclosure half. Next, position the PCB within the enclosure and tack solder into place to hold everything securely.
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