[TriLUG] Ideas for Replacing Home Office Workhorse Computer?

[Matt Flyer via TriLUG]

>From what I remember in the USB (host controller) design I did several
years ago, it used a certain FET transistor with a known RDSon and then
measured the voltage across the FET.  As long as the current were
flowing out of the +5 power source to the USB port, it would get
detected regardless of the return path.

   
On Mon, 2019-01-07 at 15:05 +0000, Brian Henning via TriLUG wrote:
> >  Maybe you're
> right about the current not being sensed if it's not flowing through
> both USB power pins.  I stand by my statement that that's a really
> bad design, though!  
> 
> -B
> 
> <snip>