Really quick question here - is it possible to use the gnd/5v from the USB cable to power the arduino thru the USB connector but use the RX/TX pins to a motherboards USB pin headers (D+/D-)?
The D+ = TX
The D- = RX
Then connect the common grounds (5v gnd and motherboard gnd together).
So:
5v (psu) ---------> arduino usb vcc connector
gnd (psu) --------> arduino usb gnd connector
TX (arduino pin) -> motherboard usb header D+
RX (arduino pin) -> motherboard usb header D-
gnd (arduino pin -> motherboard usb header gnd
Will the gnd pin on the arduino be considered "combined" since the psu gnd is connected via the USB connector (grounding both usb gnd and motherboard gnd)?
The arduino i am using is this:
Thanks for your help!