This is about how USB ports/devices work
Lets say i have a USB port on my computer
If I have an arduino board or something similar, am I able to connect output to Data+ and sort of make my own USB keyboard. What I aim to achieve is send without having to receive
1) Would I need to connect it to both D+ and D- so it forms a circuit in order for the USB port to read the data? (or would the data simply be read and then disappears so I don't have to worry about two wires?)
If Yes: 2) If I manage to forcefully push electricity through the wire onto the Data pins, would I only need one wire?
Else: 3) is this physically impossible and the whole universe would explode if I tried?