[amsat-bb] Re: OLPC-HYPERTERM-PICOCOM
bruninga at usna.edu
Fri Sep 19 13:19:49 PDT 2008
> OLPC produced a user-repairable (to a degree!),
> 2-watt laptop with built-in wifi, mesh
> networking, and a screen viewable indoors or
> out... so it's easy to see the ham radio
I had mine on display at the NASA openouse outside in my Ham
radio idisplay and had it hooked to a 1 watt solar panel. I was
surprised when it went dead a few hours later (initial state of
So overnight, I put it on a power supply and observed that the
run current is 480 mA and the sleep current is 360 mA. That
surprised me. At 12 volts, that is more like 6 watts than 2.
No wonder my 100 mA solar panel didn't help much... Yes, the
internal battery is runnning around 6 volts which means about 3
watts, but still you have to give it at least 11.8 volts or so
before the switching regulator kicks in and draws much at all...
So to me it is a surprising 6 watts of etxternal power
consumption to power it...
Still I love it.
The laptops are designed for
> children (ages
> 6-12) in third-world countries, the Sugar interface is a bit
> awkward, and
> there have been some serious blunders along the way. These
> have dampened
> enthusiasm in the USA.
> The official website is at www.laptop.org.
> Solid information is in the wiki:
> Unofficial but useful source: http://www.olpcnews.com/
> The second 'Give One, Get One' (G1,G1) program starts in
> November and ships
> through Amazon.
> 73, Scott N1AIA
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> the author.
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