C&K Slide Switch (SS-24E06-TG 5 (P)). Drawn in FreeCAD with a "reasonable" level of detail. I included an extender for the actuator that can be 3D printed. With the extender attached to the switch it can act as a mechanical block for the USB port on a STM32F4xx Black Pill module. This can be used to prevent accidentally connecting USB power while the Black Pill is externally supplied with 5V. It is very un-recommended to back feed power into the USB port of most compute. The 5V pi on the Black Pill are directly connected to the 5V from the USB-C connector so it is wise to disconnect external power from the Black Pill before connecting it to USB power. The animation shows how this can be acomplished.