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• 17:01, 10 May 2024 Christopherh talk contribs created page USB HID relay (Created page with "The USB HID relay box contains one of these: 240px It is a simple device that converts USB to a HID device so doesn't tie up a comport. When special commands are sent to the comport it either energises or de-engeriges the relay, switching between NC (Normally Connected) and NO (Normally Open). So if a wire is routed through NO -> COM, when the relay is switched on the contacts close and the circuit completes. When switched off again it...")