I have a use for powering multiple laptops (four to begin with, possibly
going higher than that) from a single source, rather than separate power
supplies all wired into the mains. I'm thinking on an open frame chassis PSU
supplying 19V or whatever the standard is. Does anyone know of anything
specifically tailored for this kind of application?
My laptops vary from 9.5v for the netbook to 19V for the Compaq. None of
them care whether or not the voltage is from an official PSU except a
very old Thinkpad 760, which uses a "unique to IBM" connector. What they
all have in common, though is that they are quite insistent that the
inout voltage is correct.
Dunno about the OP, but we had 20 laptops arrive the other day and I
have to arrange to charge them all. Doing it with 20 mains sockets and
20 little chargers is a right royal pain in the arse - it's bulky and
prone to people nicking the chargers and not putting them back properly.
If the laptops need individual regulation (which I'd hope they wouldn't, but
you never know), buy N car chargers and then run them off the 12V rail of a
PC power supply or three. Cable tie the charger bricks down (to a nice
metal plate for heatsinking, ideally).
Indeed, which is why you use car chargers to regulate from 12ishV to 19V or
whatever the laptops expect. The car chargers are also designed to take
the noisy power that comes out of a car electrical system, so should protect
you if anything goes wrong.
I'm surprised that straight barrel chargers have any kind of intelligence:
I'd have thought all the regulation would be in the laptop. So give the
laptop 19V at 2A (or whatever) and see what happens. I'd expect that any
voltage around there would also work, but it depends how paranoid you are
about frying laptops.
Don't know if you are commenting on it, but the 'inteligence' refered to
in other parts of the thread is this protection (racket) thing.
Some other manufacturers are up to the same as it apparently exonerates
them from blame if the customers machine blows up while using a
non-original adapter. Actually the real reason is ... (cont on p94)
Hi - the situation is not dissimilar to that, it's for powering an 'array'
of laptops for a project, without the bulk and untidiness of multiple PSUs.
They are Samsung (single Jack connector) FWIW - though I do take the point
about the laptops being 'intelligent' about the power supply...
On Wed, 09 Mar 2011 23:35:39 +0000, The Night Tripper wrote:
Ahh. Wondered if you were trying to run them all off low volts DC or
I know it's not the answer you're after but if it were me I'd be inclined
to a largish plastic storage box and sling the PSUs and a mess of
trailing blocks in there so I have a large "multi laptop PSU" with one
mains cable in and n*DC cables out to the lappys.
Criterion | Points
elegance | 0
job-done | 10/10
Many hands make light work. Too many cooks spoil the broth.
On Thu, 10 Mar 2011 02:21:21 -0800 (PST), Man at B&Q wrote:
Aye, my little 150W invertor when inside a box with all the other
gubins to get the playstation to work in the car shuts down with
"overheat" after about 45 mins. That's only powering a Playstation
II, 50W at the very most.
I suspect that any single PSU will also have to be quite beefy. What
does a laptop draw when running and charging, couple of amps at
twenty volts (ish)? IIRC there are twenty laptops so that's 40A.
Our local primary school has a set of thin pigeon holesto store and
charge a similar number of laptops. The individual PSU's are mounted
on the rear and plugged to a large 13A distribution strip. The LV
wire comes through a hole in the back of each pigeon hole.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.