Connect to Your Raspberry Pi Over USB Using Gadget Mode

Attaching to a Raspberry Pi's Serial Console (UART) for debugging

Overview, Turning your Raspberry Pi Zero into a USB Gadget

USB add-on boards leverage Raspberry Pi Zero test pads, USB Gadget mode - CNX Software

A DX7 USB Dongle – Simple DIY Electronic Music Projects

Raspberry Pi Zero USB/Ethernet Gadget Tutorial - Circuit Basics

power supply - Powering Raspberry Pi Zero when USB OTG is in device mode - Raspberry Pi Stack Exchange

Composite USB Gadgets on the Raspberry Pi Zero

usb - RPI Zero W gadget after plugging in turns my PC off - Raspberry Pi Stack Exchange

mini project: the Raspberry Pi Zero USB gadget