linuxcaffe; thinkpad battery life

[JAMES KNOTT]

 --- David J Patrick <davidjpatrick-rieW9WUcm8FFJ04o6PK0Fg at public.gmane.org>
wrote: 
> On Wed, 2004-10-27 at 21:31, JAMES KNOTT wrote:
> > 
> > Unless the power supply supports remote sensing. 
> I've
> > seen a few of those.  They have an extra pair of
> > wires, which is used to measure voltage at the
> load,
> > eliminating an problem with voltage drop in the
> load
> > carrying wires.
> 
> That presumes a single end point, no ?

What remote sensing does, is make the power conductors
invisible to the load.  Assuming you had 4 computers
at a table, with the shared power supply some distance
away.  With a common power supplie, you'd have to
worry about voltage drop going back to the power
supply.  If you had a remote sensing supply, measuring
the voltage at a common feed point at the tables, the
long run to the power supply can be ignored and the
leads from the common point to the computers, would be
short enough, so as to not cause significant voltage
drop.



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