Hello, first time post! I was lead to believe that putting the recommended voltage into my arduino mega via in Vin pin (external battery power) would shut off the Usb power from my laptop. What I've actually observed is that, whether i put in 7V or 11V into Vin, my USB is still drawing power (I note on my dc power back that the power delivered to Vin changes when I plug and unplug my usb, showing that USB must be supplying some power).
Does anyone know what is happening here? Any takes would be extremely appreciated! I was hoping to have my USB data only! (without cutting cables!)