Making a USB Game Controller : 6 Steps (with Pictures) - Instructables
Amazon.com: SJ@JX Arcade Game Controller Encoder 3D Analog Stick Sensor Fly Joy DIY Code Board Gamepad Joystick Button for PS4 PS3 Nintendo Switch Android Raspberry Pi Retro Pie PC : Everything Else
Phonetroller | Hackaday.io
DIY ESP32 Bluetooth GamePad for Android, PlayStation and PC - Share Project - PCBWay
Today I learned about these fantastic DIY mods that make modern gamepads one-handed - The Verge