A few days ago, I picked up my USB extension cable which was connected to my PC, and the other end was not connected to anything. The cable was really warm. I then plugged it into one of those "USB Doctors", and noticed it was drawing 4A+. I realized there was a short at the other end of the USB cab…

USB Port Short Circuit Question

DVDdoug October 2, 2017, 2:51am 2

I'd guess the current spec is a minimum for the supply and a maximum for the device.

Topic		Replies	Views
USB port max current Device Hacking	3	2995	May 6, 2021
USB port : short-circuit safety? Frequently-Asked Questions	4	3954	May 6, 2021
Power issues General Electronics	12	3515	May 6, 2021
Powering through USB? Motors, Mechanics, Power and CNC	8	2861	May 6, 2021
What if my USB port doesn't have enough current to supply Arduino? General Electronics	10	1578	May 6, 2021