USB cable for 3 inputs - for the switch, switch, button, DIY on the USB port - P.U.H. HESTA
USB Port Charger & Transformer Kit 1/2" Fitting
USB cable for 6 inputs - for the switch, switch, button, DIY on the USB port - P.U.H. HESTA
Robert's Gadgets & Gizmos - USB Port Projects | Electronic engineering, Electronics projects diy, Electronic schematics
Amazon.com: Newest 83W Laptop Car Charger Socket 12V USB Outlet: OUFFUN 65W PD3.0 USB C and 18W QC3.0 Car USB Port 12V Outlet Charger with Power Switch Waterproof DIY USB Adapter for
Make the most out of your computer's USB audio port - CNET
Making a USB Game Controller : 6 Steps (with Pictures) - Instructables
USB Bit Whacker - Simple USB input / output device
Make your own DIY USB Joystick using Arduino - Hackers Grid