There are "USB condoms"[0] that let you only use the power pins of USB, but sadly that is not applicable to this concept. [0]: http://int3.cc/products/usbcondo

There are "USB condoms"[0] that let you only use the power pins of USB, but sadly that is not applicable to this concept. [0]: http://int3.cc/products/usbcondoms http://int3.cc/products/usbcondoms