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Posted by gfretwell on October 4, 2009, 11:53 pm
On Sun, 04 Oct 2009 22:29:31 -0500, AZ Nomad
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>>feds should mandate a wall wort standard, the wide variety of them
>>clogging the landfills is very wasteful. all wall wart devices could
>>be designed to accept a standard voltage.,....... same for a cell
>>phone charger standard to cut down on trash
>Its finally happened: USB
Which is why I suggested 100 insults ago that a 5vdc system might be
usefully, and perhaps 12vdc
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Posted by WW on September 28, 2009, 12:14 pm
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> 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/estore/popup_image.php?pID=47&osCsid=86e4daf8d5319ed8efaa7a77410624ea
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>Would not work for my flashlight. WW
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Posted by MikeB on September 28, 2009, 12:19 pm
> > A 9 volt battery eliminator picture...
> >http://www.wirelessmicrocolorcam.com/estore/popup_image.php?pID=3D47&os.=
> >Would not work for my flashlight. WW
That URL resized my Firefox Browser window! Not cool.
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Posted by The Daring Dufas on October 3, 2009, 1:09 am
MikeB wrote:
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>
>>> A 9 volt battery eliminator picture...
>>> http://www.wirelessmicrocolorcam.com/estore/popup_image.php?pID=47&os...
>>> Would not work for my flashlight. WW
>
> That URL resized my Firefox Browser window! Not cool.
>
Look at the URL, it's for a popup window.
TDD
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Posted by Jules on September 28, 2009, 2:27 pm
On Mon, 28 Sep 2009 08:52:38 -0700, Bill wrote:
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> 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.
When I was thinking about this, I was going to put a bank of inexpensive
(relatively) car/truck batteries in a dedicated vented area out behind my
workshop and potentially move to 24VDC rather than 12 due to the losses
involved in low-voltage DC appls over any kind of distance (initially
testing just for the workshop, and if successful wiring the house, too).
Charging / supplemental power could be via all sorts of means, of course.
show/hide quoted text
> 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".
The problem is that you'll either have the inefficiency of running DC-DC
convertors all over the place, or in hacking your devices to better match
them to the available power (lots of stuff does the regulation on-board
rather than in the wall-wart).
Personally I was thinking along the lines of doing it to power some of
the lighting and things like my laptop which can be easily adapted, but
it wouldn't be possible to completely switch off the AC supply at present
- but maybe one day there'll be a standard for low-voltage DC outlets and
devices will be available that'll just use them.
cheers
Jules
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>>clogging the landfills is very wasteful. all wall wart devices could
>>be designed to accept a standard voltage.,....... same for a cell
>>phone charger standard to cut down on trash
>Its finally happened: USB