DIY PSX to USB is A-OK! - Make
Brook Super Converter: Switch/Xbox One/PS3/PS4 to PS2/PS1 Adapter - Focus Attack
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DIY USB Serial Communication Cable
PSX2USB PlayStation Controller to USB Adapter by Jeff Chen, Download free STL model
PS1 Controller Joysticks With Arduino : 5 Steps (with Pictures) - Instructables
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The Ripping Thread - How to build your own legit retro ROM library. - Video Games - Retro Game Boards
Batocera Gaming USB Stick 43000 Retro Games 128GB USB 3.0 Flash Drive For Steam Deck/PC/Laptop 70+ Emulators For PS3/PS2/PS1/N64 - AliExpress
Question - How to make PS2 steering wheel work on a PC ?
How to make a DIY PS2 controller to a USB converter - Quora