Downtown Doug Brown » Building Alex Taradov's open-source USB sniffer
How to Emulate an Xbox Controller with Arduino (XInput) - Parts Not Included
How to Connect a USB Gamepad to a Computer with Windows 10, 8 or 7 in 2019 🎮 - YouTube
The best controller for steam deck is one you already have. My PS One Analog is still working, tho through cable with more than a decade old PS2 to PS3 USB converter.
Reverse Engineer Game Controller with custom PS2 Interface - Project Guidance - Arduino Forum
Amazon.com: 2 Pack Classic USB Controller for NES Gaming, miadore PC USB NES Controller Retro Game Pad Joystick Raspberry Pi Controller for Windows PC Mac Linux RetroPie NES Emulators : Video Games
USB Midi Device From Old Gamepad : 17 Steps (with Pictures) - Instructables
Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
Nintendo Switch Zelda Breath of the Wild REMATCH Controller by PDP
Nintendo Switch Ancient Arrows REMATCH Controller by PDP
Marko Mäkelä's electronics projects: Connecting Atari VCS 2600 style joysticks to USB
usb device - SERIAL/USB game controller reverse engineer - Electrical Engineering Stack Exchange