There is a standard used in instrumentation stuffsort of autovolt
on DC. Those devices work on anything from 10 to 30 volts, so it covers
at least
12.0, 13.8, 24 and 28 volts.
Those devices are NOT inexpensive, and maybe a manufacturer would think
a lot
to add some regulator inside the two
Subject: Re: [digitalradio] Computers that operate on 12 vdc
There is a standard used in instrumentation stuffsort of autovolt
on DC. Those devices work on anything from 10 to 30 volts, so it covers
at least
12.0, 13.8, 24 and 28 volts.
Those devices are NOT inexpensive, and maybe
Sent: Tuesday, January 30, 2007 4:42 PM
Subject: Re: [digitalradio] Computers that operate on 12 vdc
Is there a reason we can't sart some sort of campaign to eliminate wall
warts. I have 8 of these things laying on my desk each producing a different
voltage for a divice that could
As long as you are going down in voltage, there are relatively simple
analog circuits that can drop the voltage to anything you might want.
While you can use a simple dropping resistor, this only works if there
is a known steady current draw and you design for that draw and you have
some risk
I had an old HP Omnibook 133 MHz (I think it was a model 800) machine that
ran just fine on 12V. I ran it from a 2.5A 12V power supply, but could never
get the sound to work ok.
73 de Brett VK2TMG
Is there a reason we can't sart some sort of campaign to eliminate wall
warts. I have 8 of these things laying on my desk each producing a
different voltage for a divice that could easily operate at 12 volts with
the addition of a tiny internal circuit costing a few cents at most, and
probably
I have an 'oft postponed low voltage bench supply project.
I'd start with a 24VDC deep-cycle battery, float charged
from auto-controlled solar, pedal-power, and AC sources.
The front panel would be a series of PowerPole connectors
and each connector would be matched to a switch that steps
down
This approach is certainly one that could be taken. The difficulty with
using inverters and then using the AC power supply is the rather large
losses you incur. I am expecting that there is at least a 30 to 40%
loss of batter power in doing the double conversions.
There are some DC-DC
Message -
From: KV9U
To: digitalradio@yahoogroups.com
Sent: Monday, January 29, 2007 11:10 AM
Subject: Re: [digitalradio] Computers that operate on 12 vdc
This approach is certainly one that could be taken. The difficulty with
using inverters and then using the AC power supply
Some of the brands I've used:
Panasonic Toughbook (I'm typing this on a CF-18)
Itronix (old 6250, ix250, ix260)
Getac (some old - some new)
Even though most of them aren't natively 12VDC, they often have 12V auto
adpaters available. I used to have one for my CF27 that worked well.
I've got a
it.
/Torbjorn in Sweden
- Original Message -
From: ZPO
To: digitalradio@yahoogroups.com
Sent: Monday, January 29, 2007 11:52 PM
Subject: Re: [digitalradio] Computers that operate on 12 vdc
Some of the brands I've used:
Panasonic Toughbook (I'm typing this on a CF-18
requirements are not very high.
k6wrj
- Original Message -
From: KV9U
To: digitalradio@yahoogroups.com
Sent: Saturday, January 27, 2007 7:04 AM
Subject: [digitalradio] Computers that operate on 12 vdc
I am wondering if anyone is using some of the PC's that are being
Sent: Monday, January 29, 2007 4:00 PM
Subject: Re: [digitalradio] Computers that operate on 12 vdc
I bought one of these via ebay from UK, but I have not had the time to start
it yet.
In the box there was the computer, a touch screen, a keyboard and a cd with
instructions and other things
I am wondering if anyone is using some of the PC's that are being
developed for various vehicular uses and apparently can run on regular
12 vdc power?
Example:
http://www.linuxdevices.com/news/NS3912331415.html
These are not low cost, but appear to be very compact and could also be
used for
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