Am researching a computer upgrade since my two laptops are giving up the ghost slowly;
I don't want to run any 240volts since the DC is very quiet and regulated - both sound-wise and electricly.
I want a 27 inch monitor running of 19 volts power-pack to run off 24volts with a buck inverter to drop the voltage 5 volts. They look to be a cuppla hundred bucks and draw about 30 watts.
The Computer itself I want to run reasonably fast, resize photos, a bit of videos editing. Mostly to watch movies on the monitor. There are these things called NUCs which are used as drivers for displays and run a Celeron or low end i3. I want to run this off DC and want the total draw from the box to be under 100 watts. No fan at all would be nice on a starry night in the middle of nowhere.
Are the single board computers any good? Latte Panda , that type of thing. Would like to run Windows 7 and Linux. I have been playing with a raspberry Pi and it really doesn't have enough processor power.
I already have a network setup so this will fit in nicely.
Would appreciate any tips...
-- Edited by Extraordinary Rendition on Tuesday 26th of February 2019 03:02:23 PM
Whenarewethere said
04:29 PM Feb 26, 2019
An Asus PN40, it probably doesn't do quite what you want but it is low power & would have enough grunt other than for 3d rendering which suck the life out of a render farm! It would be perfect adequate for 2d work.
dorian said
04:46 PM Feb 26, 2019
Does the monitor's 19V supply have enough headroom to accept a 24VDC input, without stepping it down? I would think that there would be several buck converters inside the monitor, and that these may be spec'ed for higher inputs. Being switchmode, I would expect that there would be little, if any, reduction in efficiency.
Do you have the model number of the monitor?
-- Edited by dorian on Tuesday 26th of February 2019 04:47:51 PM
Extraordinary Rendition said
05:41 PM Feb 26, 2019
Dorian wrote "Does the monitor's 19V supply have enough headroom to accept a 24VDC input, without stepping it down?"
I haven't bought a monitor just yet. Just speccing it up at this stage. A few of them seem to use a 19volt input from an inline 240v power pack. I have 24volts (nominal) from the Batteries probably maxing out at 28volts. I would be a bit woried about blowing up the monitor. I have ordered some DC DC buck inverters from Bangood and will see how they perform. Might be a good idea to hang some extra protective circuitry off them too depending on what comes from China. Cheap and cheerfull but the failure rates are quite high. I have ordered some spares but the monitor is not expendable.
However you are right. In all probablity the power conditioning in the monitor will be quite sophisticated and it would be good to know the input specs. a switch mode power supply shouldnt "blow up" , merely dial the PWM back by the percentage of over voltage. No extra power dissipation. I am looking at some from PLE at the moment. The info on PLE is a bit scant and the manufacturer not much better
Am researching a computer upgrade since my two laptops are giving up the ghost slowly;
I don't want to run any 240volts since the DC is very quiet and regulated - both sound-wise and electricly.
I want a 27 inch monitor running of 19 volts power-pack to run off 24volts with a buck inverter to drop the voltage 5 volts. They look to be a cuppla hundred bucks and draw about 30 watts.
The Computer itself I want to run reasonably fast, resize photos, a bit of videos editing. Mostly to watch movies on the monitor. There are these things called NUCs which are used as drivers for displays and run a Celeron or low end i3. I want to run this off DC and want the total draw from the box to be under 100 watts. No fan at all would be nice on a starry night in the middle of nowhere.
Are the single board computers any good? Latte Panda , that type of thing. Would like to run Windows 7 and Linux. I have been playing with a raspberry Pi and it really doesn't have enough processor power.
I already have a network setup so this will fit in nicely.
Would appreciate any tips...
-- Edited by Extraordinary Rendition on Tuesday 26th of February 2019 03:02:23 PM
An Asus PN40, it probably doesn't do quite what you want but it is low power & would have enough grunt other than for 3d rendering which suck the life out of a render farm! It would be perfect adequate for 2d work.
Does the monitor's 19V supply have enough headroom to accept a 24VDC input, without stepping it down? I would think that there would be several buck converters inside the monitor, and that these may be spec'ed for higher inputs. Being switchmode, I would expect that there would be little, if any, reduction in efficiency.
Do you have the model number of the monitor?
-- Edited by dorian on Tuesday 26th of February 2019 04:47:51 PM
Dorian wrote "Does the monitor's 19V supply have enough headroom to accept a 24VDC input, without stepping it down?"
I haven't bought a monitor just yet. Just speccing it up at this stage. A few of them seem to use a 19volt input from an inline 240v power pack. I have 24volts (nominal) from the Batteries probably maxing out at 28volts. I would be a bit woried about blowing up the monitor. I have ordered some DC DC buck inverters from Bangood and will see how they perform. Might be a good idea to hang some extra protective circuitry off them too depending on what comes from China. Cheap and cheerfull but the failure rates are quite high. I have ordered some spares but the monitor is not expendable.
However you are right. In all probablity the power conditioning in the monitor will be quite sophisticated and it would be good to know the input specs. a switch mode power supply shouldnt "blow up" , merely dial the PWM back by the percentage of over voltage. No extra power dissipation. I am looking at some from PLE at the moment. The info on PLE is a bit scant and the manufacturer not much better
Acer K272HLE 27" Full HD 4MS VA LED Monitor PLE.
ACER Website
I am not wedded to this unit or manufacturer. Just the size / power is important. I never game and that resolution is perfect.
-- Edited by Extraordinary Rendition on Tuesday 26th of February 2019 05:54:45 PM
-- Edited by Extraordinary Rendition on Tuesday 26th of February 2019 06:05:36 PM
A 24 volt Victron DC to DC converter has an output range from 20 to 30 volts, if 20 volts is not too much.