Simple USB Switch Step 1: Prepare the Case.Step 2: Wire the Switch. Now the switch needs to be wired.Step 3: Test! Make sure double check the wiring before testing!Step 4: Assembly. Did you make this project? Share it with us! We have a be nice policy. Simple USB Switch: 4 Steps Was this helpful? USB Switch ICs | Mouser USB Switch ICs USB Type-C Alternate Mode 4x6 Differential Switch 30-WQFN -40 to 85 USB Switch for Printers Schematic Circuit Diagram Jul 18, 2019Instead of unplugging the printer from the PC and then into the laptop, the circuit switches the USB connection automatically. K1 and K2 are standard type-B USB sockets, while K3 is a USB type-A socket. The USB lead from the laptop plugs into K2 while the PC’s USB lead plugs into K1. A USB cable from K3 connects the printer to this circuit.