USBJoy2.0E adapter - Extended Version. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers
Cheap and Easy Arduino C64 Keyboard to USB Adapter - Retro Game Coders
USB C64 Joystick adapter (for emulator) - Commodore Remix
USB Joystick Adapters – breadbox64.com
DIY RS-232 Interface for Commodore C64 for under $15
USB 1351 Mouse Emulator | Add-ons | ConsoleKabels.be
C64-C128 PSU Adapter - Commodore 64 to 128 Power Supply Adapter Cable 4260536081201 | eBay
9 Pin Joystick to USB Adapter
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AUKEY USB C Hub Ultra Slim with 4 USB 3.0 Data Ports Black CB-C64 - Newegg.com