Better than OLPC [LWN.net]

Better than OLPC

Posted Jan 10, 2009 0:59 UTC (Sat) by dlang (guest, #313)
In reply to: Better than OLPC by Ze
Parent article: Changes at OLPC

given that the OLPC does not have a crank on it (and therefor no wind up power source) this post shows that you don't know what the origization is actually doing and shipping (as opposed to what they thought would be possible and practical several years ago)

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Better than OLPC

Posted Jan 10, 2009 3:37 UTC (Sat) by Ze (guest, #54182) [Link] (1 responses)

You've got me there.

So I went to see exactly what they were shipping and the lack of wind up power was the only thing different to what I expected.

IMHO that's a killer for a lot of markets where power isn't available all the time. That to me was one of the killer features of

it , when you combined that with a mesh network , you can end up with quite a nice distribution model for new areas without a permanent net connection , by piggybacking on the part of the population is mobile in different areas and different radii. A good distribution model like that is important if it's supposed to meet it's educational goals.

I think Mary Lou has the right idea with the screen , if they can reduce the cost of that by mass production and popularising it in the general mobile market ie tablet pcs,netbooks,mobile phones,etc. Then the chances for long term success of a cheap education tool become much better.

Better than OLPC

Posted Jan 10, 2009 4:17 UTC (Sat) by dlang (guest, #313) [Link]

this question came up a lot last year as the machines hit mass production. I was at a presentation by Mary Lou Jespin to techies (the USENIX conference) and the question was asked there.

the answer is that the crank ended up being fragile, and not that efficiant, so what they did was to make the laptop _extremely_ forgiving on it's input power (something like 7-30v tolerance and charging best on 9-15v), so it can get power from very dirty sources.

the other thing is that a person cranking can produce more power than a single battery can efficiently absorb, so the emphasis shifted to charging several batteries at once, and produce a large number of different chargers.

they have string pull chargers (think lawnmower)
bow chargers (think old western fire starter moving the bow back and forth)
solar chargers
as well as many other charger designs (wind, water, animal power, etc)

as far as the screen goes, my understanding is that it's cheaper to produce than normal LCD screens (it has 1/3 the pixels of a conventional screen of the same nominal pixel count while having ~3/2 the effective resolution in color mode), it should hit the market in other devices Q1 or Q2 of 2009