I hope to run most of my Web sites, email, etc, off this (~5W) or something similar in the future (replacing my current ~18W laptop):
http://www.marvell.com/products/embedded_processors/developer/kirkwood/sheevaplug.jsp
also see:
http://gbenson.net/?p=137
So I'm going to get familiar with this one since and wait for the new round of ARM-based netbooks/laptops and similar.
Uses less power than most lamps, even low-power lamps! Less than my ADSL Internet modem...
Rgds
Damon
It has a USB/serial console access for emergencies I guess but most of the time I'd access it as I do my current server, via SSH in one or more xterm sessions from my Mac or other laptop. No need for graphics support at all.
The plug has a slot for a SDHC memory card, ie up to 32GB.
I need something like 100GB+ storage, which I could do with a slowish external power-efficient hard disc or solid-state mass storage, which would have to be have a very power-efficient sleep mode. I would expect to cache frequently-accessed on the SDHC.
Unless I put in a USB hub (or put in some clever Ethernet based stuff for example) then I can't get at my current digital inputs of off-grid solar system battery state-of-charge and nor could I run my X-10 automation stuff. The former would be more of a shame than the latter.
In the end I may end up with something more like this which exposes more direct I/O:
http://www.marvell.com/products/embedded_processors/developer/kirkwood/openrd.jsp
In any case there is real hope that it could be run 24x7 throughout the year from my 120Wp 12V.40Ah off-grid system that powers my office lighting.
The ADSL modem would remain on-grid for the time being.
Damon[ Parent ]
And caching the frequently used stuff on a memory card to reduce the need for disc spinups yet further seems to work.
Basically I hope that getting away from the x86 to ARM will more than halve my consumption with a bit more careful trimming of my main applications, but I'll have to be very careful with the peripherals.
All are x86 and could still use some help in that area... but the servers seem the most logical place to start since less power also means less heat means more reliability, and they're not really all that high traffic...
Steve[ Parent ]
I don't, but I see no reason why it couldn't.
One note of caution: laptop HDDs are speced for as much as 10x more spin-down/spin-up cycles as desktop drives AFAIK. Run laptop mode with the latter and you may kill the drive.
Looked at using a router? http://www.dd-wrt.com/dd-wrtv3/index.php
Install Linux, HDD etc. CPU below 1ghz for the most part, not sure what horse power you need. Bunch of support for IO.
Much cheaper than a laptop!
Have fun, Scott.
Yes, indeed, and ideal would be to piggyback it all onto my ADSL router I think since that is going to be the most power-hungry part when I've done.
But I need (I think) at least 512MB main memory and preferably more, and at least 1GHz CPU when operating at maximum speed.
YMMV: Verify the internal power supplies in the ADSL router is a switching supply. My Router uses 12v input, internal voltage regulator drops it down to 5v, then 3.3v. Replacing with a switching supply should cut power in half. Already a switcher, then no gain.
Have fun, Scott. [ Parent ]
What I've been amazed by though is the way even standard desktop technology has reduced its power needs.
I'm currently running my UPS, a satellite Set Top Box, my ADSL modem with phone interface for VoIP and my new server box and taking less that 80w for the lot. My last box (6 years old when I replaced it last month) was bringing the total to over 200w.
Sounds a lot until I tell you that the server is a dual core CPU, 4G of RAM, 5TB of raid5 disk (5 off 1000GB disks spinning!!), a 160GB system drive, two TV cards and the only consession to power usage so far is to clock the CPU cores on demand so they slow down (and run at below 20C) when not much to do.
I'm going to be saving over NZ$200 a year on power bills just by doing an upgrade to a computer that is 10 times faster, has 5 times the storage, 4 times the RAM and graphics that were not even dreamed of 6 years ago!!
Yeah!! Robin - Down Under (or are you Up Over)[ Parent ]
My new computer draws double that power. Dual core 6Ghz, 1Tb HDD. No RAID. Running SETI, drawing 135w, UPS 24w, Router 5w, not measured cable modems or several switches. Not running SETI computer uses 86w.
What CPU and motherboard you using?
Have fun, Scott.[ Parent ]
ASUS M3N78Pro motherboard (GeForce 8300 onboard graphics) Corsair PC2-6400 DDR2-800 (4GB total) AMD Athlon X2 5050e CPU AM2 45W (2.6GHz) CoolMaster Centurion 590 case with 400w PSU ASUS DRW-22B1ST DVD writer
The 45 watt CPU was not out when I was looking. AMD Athlon X2 5050e CPU AM2 45W (2.6GHz) Nice CPU, maybe will build a computer with it. Design and build my own computers, above $320 back in Nov08, all new except case. Driving factor is cost/performance for SETI, had 22 going for a while.
Scott.[ Parent ]
http://www.mini-box.com/Samsung-S3C2440A-400MHz?sc=8&category=1130
I've also got a Seagate FreeAgent Go 120 Gb external usb hard drive; just a heads up but it doesn't play nice with Linux. Had to kill the auto powewrdown because it wouldn't restart when required. Only works with Windoze apparently.
Amanda
BSD is the Big Swinging ... um ... something of *nix. But I like Linux too.
Put in an order for a new gecko edubook. Thing runs on aa batteries! 8 of them for 4 hours. I dont know, 2.5w? With a screen. Preproduction models sent out next week. Dont know if i made that list. Norhtec, the outfit making these has some low power servers. I imagine the SOC tech will make ultra low power servers a reality. Probably run slower than molasses but hey beggars cant be choosers.
cheers, stonebrain[ Parent ]
The rest of the world? Well, not so sure. It's been a long debate for a while as to whether the world would be able to survive if someone 'pulled the plug' on the entire internet at once... Nobody knows how to use paper anymore.
Personally I think my wife would flat out croak if the internet died... I love her to death but she's way too dependent on technology.
All I've found so far just is more than I'd be willing to spend though.And yes I know there are VoIP solutions that will work on linux, it's just the the magicjack service is extremely cheap and very clear. I've experienced no problems with it. I'm just not willing to build a 250 server just to use my phone. I would like to reduce my power usage, though. Too bad that sheevaplug won't install XP..
Always a tradeoff somewhere... :(
First: Program, out on the web there is a program called XPlite, just google it, download it and give that a try. Our company uses it to dump the 100% garbage built in XP, which also makes it safer and harder to hack, before sending the laptops out into the world. Its a stable program, been around for a few years now, if it's what you like it can be purchased, which gives even more abilites plus support. I don't own stock in this company(wish I did), just know how well it works and have two IBM 380Zs running the 98lite on 64mb CFs which includes a wired PCMICA nic. sitting 3 feet behind me. The cards were in the trash pile :()
Other item is pretty easy to find for around 12USD, turns the old CF cards in HDs. Once your XP is pared down to size, use the CF, load your XP onto it and off you go.
THIS is what our company is doing with the older Dell SF desktops that are in our Cafe's for lunch time surfing.
Less heat, no HD to fail and makes ghosting them out 100x easier.
Hope this helps; Bruce S
[ Parent ]
That would be an atom Mobo CF card, cf to IDE, PS, and no case!
Right now I'm using an older dell that runs it just fine, It's just the power consumption I'd like to lower.(which i have somewhat i pulled out all unnecessary components, and run w/no monitor on it)[ Parent ]
Did you see the fit-PC? About 6W consumption and runs XP...
http://www.fit-pc.com/fit-pc1/
Bruce S
Specs:
Power usage: Normal use (Wifi enabled, backlight 3/10, browsing internet) - 10.5w Idle (Wifi enabled, backlight 3/10) - 8.5w Idle screen off (Wifi enabled) - 7w
I could do more tests but I don't have the time. Needless to say it is a very very low power machine and would be perfect for your projects. It even has that lovely SD card slot which supports the 32gb card you spoke of. Also, it has an expresscard slot for an SSD HDD should you wish to replace the mechanical 80GB drive (I wouldn't, its very low power and contains plenty of space).
At a cost of under £200 its a steal.http://www.repowered.co.uk - My Renewable Energy site. msn[at]m3ezw.co.uk - my msn if you want a chat.
I'm hoping that a switch to another well-supported but non-x86 architecture and form factor is big enough of a step-change to help other people do it overcome their worries to try it too, and at ~£100 all-in, it's truly cheap and capable enough for some people to be able to run their Web sites, etc, at home or whatever on a fraction of what co-lo might cost and consume.
So, this is an 'educational' project for me (and anyone who reads my write-ups)!
Having said all that, if Intel continues its good work on x86 energy efficiency then I have no fundamental objection to using a machine like yours.
My target is to have the whole schmole including DSL connectivity on <10W within a year or two, and at least the computing part able to run off my 40Ah 12V off-grid PV system battery for at least 24h. This is just an experimental step on the way there.
There are way too many factors unfortunately; cost, performance, energy consumption, use-case, anticipated load, time to tinker with it, knowledge level... the list goes on and on...
Steve [ Parent ]
Obviously that theory is no substitute for trying it in practice! B^>
I now have my little SheevaPlug Linux box running from my off-grid solar PV system, and it's drawing a whole 3W. I don't think that it'll draw more than 6W maxed out the way I intend to have it set up. At 5W it could run off my small solar battery (12V, 40Ah) for a couple of days without a ray of sunshine to 50% DoD...
(Note that just about 1W is taken up just running its Ethernet connection. The ADSL/modem/WiFi takes ~8W from the mains.)
It's still a tad slow though acceptable for my purposes, and various tuning and other services need to go in, but it lives! And entirely solar powered off-grid, with my meter saying 3.1W. B^>
PS. Can't remember if I posted my set-up page, apologies if I did: http://www.earth.org.uk/note-on-SheevaPlug-setup.html[ Parent ]
(The ADSL modem has to remain on-line for the moment, but I'm working on that.)
So basically I need to move my mail and SVN and remaining Web services (and data) across and I should be done.
The biggest problem I have is the DC power from my 5V regulator which seems to be dodgy!
PS. Separately my MPPT solar regulator should help ensure that there is enough solar power in winter...
PPS. This 'sabbatical' thing seems to involve rather less income and rather more spending than might have been hoped!
I have just moved the last of my services, mail, to my SheevaPlug.
So everything is now off the previous laptop/server and it is powered down.
Services include Web (static and Java-based), DNS, mail, NTP.
(I'm sure that there'll be the odd glitch and I may well use that laptop for other things...)
The battery got as slow as 'yellow' (part-full) status on my solar controller, so I spent a lot of today fixing various software issues to reduce consumption.
(I had to switch back to mains for a day or so to let the battery recover.)
I added another 12Wp (~10%) to my off-grid panels, switched to a more-efficient DC-to-DC converter, and tuned various parts of the software again to further reduce consumption and 'idle' more when the battery is low.
All in, including the converter, consumption is usually under 4W (difficult to tell exactly given the granularity of my power meter in 100mA increments).
I now have a little under 200Wp with about 120Wp facing due south and steeply (~70degrees) inclined to optimise winter collection. The 120Wp and my MPPT should really cover the below-5W 'quiet' power consumption of the plug.
I did bargain the manager down to their 'offer' price (it's not currently on offer) which is about 1/3rd off the ticket price, so at a little over £3/Wp they are about the cheapest per Wp that I can lay my hands on and I'm happy with other TopRay/Maplin panels that I have.
I expect to put these new panels away in summer when I have lots of other generation and kids romping on the grass given that they are at ground level and contain glass. And I'll have to move them at least once to mow the grass this week.
I also found evidence of an overheated junction/terminal so I'm probably going to put in some quality rewiring time tomorrow afternoon if possible when I get back from being on a panel discussion where someone has mistaken me for an expert on something! B^>
Reality sure bites doesn't it! Between pie in the sky industry ratings and low sun days solar can be downright disappointing. However, when it works it just works which is good.
Tom
Ignarus can exsisto rememdium. Sardus est forever
Being in a dip and in a leafy suburb doesn't help right now with the trees stubbornly refusing to drop their leaves. You should see the effect on my roof panels in the morning this month: enough to make you weep even if it is already factored in...
A few very gloomy days and taking the battery right down to 11.4V and no recovery even keeping to switched off for a day or so and I've had to revert to mains power (albeit only 4W!). I feel dirty. B^>
And we're due 80mph (129km/h) winds over the next day, which even in my stupid location should hopefully push the odd Joule in...