Slashdot Mirror
Solar RISCOS Computer
A reader sent in a link to an ultra-low-power RISCOS computer designed to be powered by a single small solar panel. They're aiming for a complete system which draws only 8.5 watts, which would be incredible if they can manage it.
Usually ARMs aren't used for higher scaled things because it lacks floating point. (Note: yes, I know ARM *just* announced floating point support in their newest cores, but even ARM7 is just an integer processor).
So, good luck even trying to do stuff like image analysis, physical simulation, etc. in an emulated FP environment.
You should never take life too seriously - You'll never get out of it alive.
Danny.
I have written over 900 book reviews
According to a blurb on the site these machines are being used largely to assist in filling innocent people's minds with western religious garbage.
The following is a PAID ADVERTISEMENT from our sponsors.
Hi There! I'm Troy McLure, and I'm here to tell these starving, oppressed Africans about the deal of of Lifetime! Sure you people are hungry now, but in exchange for your personal integrity and common sense we're willing to help you convince yourself that your suffering here is a wonderful and fullfilling way to accrue spiritual bonuses that will pay off BIGTIME when you reach those pearly gates! Order now, and soon you'll be saying "Oh boy! Thank you Jesus, I can't wait to die!"
/ADVERTISEMENT
**>>BELCH
Gets dark? Hand crank. Car batteries.
dude... the Crusoe is a form of RISC chip. The guy who developed the concept of VLIW (very long instruction word), the same guy who suggested that RISC offers better performance over CISC, is one of the founders of Transmeta.
Crusoe is like a "super tiny number of operations" chip. It supports more advanced operations in a software layer around the chip (and that's why it can emulate an x86 chip). Of course it also optimizes as it goes.. but that's outside the scope of what we're discussing...
So, no.. crusoe is not a "power-hog compared to many RISC processors".. it should fall in the lower end of the spectrum of similiarly performing RISC chips...
-Andy
What is the point of taking these things into 3rd world countries? You'd think folsk would try and feed the people before they gave them e-mail... Although, these units might be fun to play with. Solar powered mp3 juke-box anyone?
Many moons ago, for fun (and field day that year :) ), I took the guts of a "laptop" power supply, bought surplus, and fitted it to a '386SX-20 system, with 5M ram, and a 40MB hd. We bolted this to an SVGA monochrome monitor that ran off of 12 volts. All of this was powered by a large 12 volt deep-cycle battery, which was, in turn, recharged by a few 15v 2A solar panels.
:) Especially when plugged into the 2m side of the satellite antenna array (which, by an amazing co-incidence (actually, it took research to find the right parts), had rotors, both azimuth and elevation, powered by 12 volts DC).
This, in turn, was attached to a TNC, and a 2m HT. both of which also ran from 12 volts. It made a rather nice emergency system
Now, granted the whole station consumed far more than 8.5 watts, but this was all off-the-shelf hardware from 1994, so I'd certainly hope that *some* progress has been made since then.
Lemon curry?
Guess again...the moon is dark for roughly two weeks at a time. There's one side that always faces us as a result of the moon making one orbit and one revolution in about the same amount of time, but it still passes behind us and is therefore cut off from the sun. That's what accounts for the phases of the moon and the occasional lunar eclipse.
Anything that orbits the earth will, by definition, be blocked from the sun at some point. If it's a really big orbit, the time in which it's blocked will be a small percentage, but you won't get access to the sun 100% of the time. If you put it into a solar orbit with an orbital period of one year, it might be doable...but would the sun exhibit enough of a pull on something as lightweight as a satellite to keep it on course? IANAOME ("OME"="orbital mechanics expert"), so I could be completely off-base on this...
20 January 2017: the End of an Error.
They should change the name to Solaris. Errr. Oh wait....
www.solarhost.com already powers more than a few websites using just the free radiation from that big thing in the sky.
What's the big deal about 8.5W? My 600MHz PIII laptop survives quite easily on 13W (at least, it lasts over 4 hours on a "52 Watt-Hour" battery), and I'm sure that could easily be reduced further. Slowing down the hard drive, slowing down the processor (& running at lower voltage), and dimming that annoyingly bright LCD backlight come to mind as simple ways of reducing the power consumption.
Tarsnap: Online backups for the truly paranoid
"Cooperative multitasking is not a real problem if you are not considering RiscOS stations as servers."
:). However, I did things other than DTP and Acorn fell behind.
The amount of times I've had apps go haywire and had to reset due to the OS using CMT is rather silly.
" IMHO, if the Wimp (RiscOS GUI - a FLA for Windows-Icons-Menus-Pointer) is so responsive (and I doubt there is anywhere a so full-featured responsive GUI) it is because Acorn aimed it at the end user which is not a bad concept."
Yes and no. Initially, it had to be fast on an 8MHz ARM2 with a dumb frame-buffer. When the ARM3 came out, Acorn did NewLook which was still fast. However, that speed came from using hand-optimised assembler, which has turned into a nightmare as far as maintaining it goes.
RISC OS was never meant to be a long term OS, it just evolved from Arthur, which was an OS they quickly threw together so they could show off their new A310.
" If you consider what RiscOS platform excell at, then you won't need real-time multitasking. Of course, now their technology may now seem obsolete but I still make an heavy use of my RiscPC as no other environment can provide me with such optimal and ergonomic tools, especially when it comes to DTP."
Ah yes, I used to love Impression Publisher. Those were the days
"The "death" of Acorn was not its community's and there are still lots of unique concepts which come from them."
The Acorn community is virtually on its death bed, and deluding itself isn't helping. After all, RISC OS Ltd. have all but decided not to bother with RISC OS 5 until they have to, and the article at riscos.org about reliability is a bunch of fluff. How can an OS with CMT, no memory protection and uses kernel modules for libraries be considered reliable at anything other than mundane stuff?
"Look at ROX, for instance..."
I actually submitted some icons for ROX back in the early days of 0.0.5 or so.
" Anyway, I'd also like to say that some "multithreading-like" is still possible under RiscOS as the fact switching betwen apps is not that optimal doesn't mean we are monotasking."
It's not monotasking, but CMT is far from optimal. I remember talk about Wimp2 when somebody implimented PMT, but it had a lot of trouble with the rest of the OS and applications being designed for CMT.
RISC OS had some neat stuff, such as the whole Application directory thing, which Apple now pretty much use in the form of Bundles. Unfortunately, it fell way behind after RISC OS 3.1. The RISC PC was OK, but RISC OS 3.5 had too few enhancements, and when Phoebe was cancelled at the last minute, RISC OS 4 didn't see the light of day until it was too late.
But here's what should be the clincher: for real democracy to work, citizens need to be able to monitor the activities of their ruling elite. That's the best way to ensure that all that aid money actually does some good, and doesn't get frittered away on boondogles and corruption.
If we really want to help all the starving masses, we have to lose the patronizing attitude. People in the third world won't move forward until they are allowed to play a role in their own future. Freedom of information is a big part of that.
__
Finally a contrast to all those powerhungry CPU's from AMD and Intel !
Probable impossibilities are to be preferred to improbable possibilities.
Aristotele
I'm no processor expert. But it would seem to me that if intel can build a 20-stage pipeline for the P4, they're going to have to waste quite a bit of that on misses of the branch-prediction process. The conditional execution of the ARM instruction set would provide an excellent means of reducing the need for much of this branch prediction. Its low power consumption and small size should be an excellent base for addition of further optimizations, such as a deeper pipeline, super-scalar ALUs, larger instruction caches and faster clock speeds. I'm sure if you were to flesh one of these out to the extent that the P4/Palomino have been, it would make quite a processor.
Imagine a beowulf, err...
What kind of orbit is that exactly that it stays on the sunny side? Not geosynchronous since that follows the same global spot around.
"Beware of he who would deny you access to information, for in his heart, he dreams himself your master."
Because of power demands, I would imagine that they would try to consolidate as many 24x7 services onto as few systems as possible so that you would not have so many cases where you would need to pull power constantly. This is obviously not meant to be used for anything more than the most desperate of moments in one's computing addiction: if you do a demonstration for a village, it has to be short and you shut it off quickly after to recharge over the rest of the day in order to keep from using those 8.5W to maximize charge time. Hopefully they'll be responsible folks and set up some proper power management on these systems. In fact, we might see the next waves of ultra-low power systems coming from Africa and developing countries, so look there for experts in saving a couple of amps and making hardware work under tight conditions. Not too far from what satellite engineers do when they design systems for use in space.
Something needing to be on all the time would probably just need a few more panels ganged together in order to charge more batteries to last through the night. If this is small enough, you could also permanently mount it in the back of a small pickup with a cap on it to use as a roving communications lab. I wonder what the cheapest, lowest power communications technology available for this is that will allow it to roam and still transfer emails in a developing country, even if it is only 2400 baud. Also remember that the target audience of developing countries does not have the same perspective of a small increase in price that we do, so increasing the size of the solar panel and the battery might just take it out of the hands of a lot of people.
"Beware of he who would deny you access to information, for in his heart, he dreams himself your master."
I have been using RiscOS computers for 6 years (and I am not a veteran) and I currently feel quite happy to see that other people tend to agree on its qualities in terms of power consumption, but also modularity, ergonomy...
>A HREF="http://www.riscos.org">RiscOS is IMHO one of the most optimized operating systems ever. It usually comes in 4-8MB ROM from which he boots in a few seconds.
It includes an excellent GUI and whatever you need to start work (TCPIP stack, Draw, Paint, Editor, tools, etc.).
It is the only 100% Plug'n Play Platform I have ever used and, most of all, as it is fully modular, whatever you dislike in this system can have its original ROM module be replaced with one of your RAM modules.
Now, if you consider that RiscOS has only been ported to specific architectures such as Acorn Computers' which implement the excellent ARM processor then it is obvious why this product is so power-efficient.
Now, an even more interesting case would be to implement a RiscOS platform around a forthcoming Amulet asynchronous processor which hardly consummes a single milliwatt when on idle.
--
Trolling using another account since 2005.
Incidently, I wonder if they're running their webserver on this board, because it's very very down right now : Slashdot effect or lack of sun ? :-)
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
I love this idea. I am very interested in projects like this which aim to give information tools to those in cultures who don't yet have access to these sorts of things that we do.
However, there is one drawback: at a price tag of $1000 US, even I couldn't afford it right now, and I make more in a month than many entire villages in the third world do.
STOP . AMERICA . NOW
Here is the real one:
Click here
or for you cut/pasters:
http://www.explan.co.uk/hardware/solo.shtml
-Hyperbolix
Are they going to invent geeks that like sunlight to use the thing too?
8.5w*1hour=30600joules (per hour)
86400/30600=~2.8235294117647058823529411764706 hours of operation off one battery.
That'll last you a while, considering that you should be sleeping for about 8 hours. That means you'll only have to turn it off an hour before bed(at the equinox), and by the time you rise, it will be operational for an additional day. However: (10w-8.5w=1.5w->5400 joules of charge per hour-> 16 hours to charge!!)
Looks like someone hasn't done math on this!
You better not use all your charge, or on an overcast day, you'll be SOL! It takes 16 hours to charge!
Of course, increasing the battery size by a half wouldn't hurt at all either, and batteries are relatively cheap compared to integrated circuits etc.
That would give it 6 hours of capacity (roughly) which would mean that one could operate about 4 hours a day if given only 3 hours of sunlight, and even more if given the solar panel only 1/9 wider/longer to get 15w.
That would allow about 1-2 ratio of sun to usage. That would make it useful in areas like mine, where we only get a few hours of sunlight on average. Rain sucks.
In the ocean acoustics world, many experiments
.5 W.
are underwater for up to 9 months at a time (such
as ice covered waters in Greenland Sea).
One can make an acoustic receiver with analogue front end (such as pseudo-matched filter) with digital back end (ADC, signal processing routines,
storage) designed around a Motorola architecture
that runs with an average power consumption of less than
There are companies such as persistor (www.persistor.com) that specialize in these low power applications.
Of course, the big drain is a screen which these
underwater systems don't have. But did anyone notice that their 8.5W figure was an 'expected' one with the LCD display? I don't think anyone has seen this number in practice yet with a screen
the size they are claiming, so I'm a bit suspicious. But maybe I misinterpreted their documentation.
...running one of these things on a planet orbiting a binary star system?
I may be an idiot, but what about the scientists behind the announcement that Astronomers Discover Planet Around Binary Star
>>intended for use within Third-world countries where its ultra-low-power design enables it to be used indefinitely away from sources of mains electricity.
Now if we could design a box with solar powered, satellite internet access, the Talbian might have some problems enforcing their internet ban.
pressure/grep
--------------------------------
Microsoft Fucking Sucks!! Up The Penguins!!
Also, the Palm only draws 3 volts, if I'm correct. Nothing major, but it certainly gets the job done for a good deal of applications (like email and even light web browsing).