windcrest wrote:
On Sep 28, 10:52 am, "Bill" wrote:
How about getting rid of all those batteries in various devices in the home
and connecting the battery connections to one central battery?

That is to run separate wires when wiring a home and these would carry say
12 volts DC. There would be a central large battery and battery charger like
the type used in a computer UPS.

Then at each electronic gizmo which needs a battery, use a "battery
eliminator" along with a voltage regulator to supply it with the correct
voltage. And plug this into a nearby 12 volts DC "outlet".

This could provide battery power to smoke detectors, carbon monoxide
detectors, HVAC thermostat, security system, clocks, digital thermometers,
computer UPS, phone answering machine, etc.

Then only ONE battery to worry about...

A 9 volt battery eliminator picture...http://www.wirelessmicrocolorcam.com....php?pID=47&os...

A more practical solution would be special J boxes that have the
transformers in them and are sensitive to loads being plugged/
unplugged and cut off power to the primary when not in use. Everyone
hates wall warts, they draw a little current even when not in use.
Your electrician would then install these low voltage outlets easily
throughout the house. The important thing is that they be able to
detect "no load" and cut off the primary, and sense an item being
plugged in or turned on and re-connect the transformer primary. Your
whole house DC distribution idea would not be able to do this because
it has to be "ready" globally with no local outlet control sensors.


There is no reason that could not be designed into wall-warts.
I've never measured the quiescent primary current draw of old
style wall-warts verses the newer tiny switcher wall-warts, I'm
sure someone has done so. I think your idea is great for office
cubicles because it could be built in during manufacturing and
would help lead to a less cluttered work space, at least for
some people.

TDD