[IAEP] [support-gang] Questions About Solar Panels

[Caryl Bigenho]

Thanks folks for the info.... now I am wondering... if I were to put the solar panel in the shade on a bright, sunny day would it work on the XO-1? Also, I still would like to know what the high-pitched whining sound (guessing it was around 1800cps) was and whether the XO could be damaged? I won't try it until I have assurance it won't damage the machine.
Back to the XO-1.75... The sun was really bright yesterday when I was experimenting, and the panel was tilted at an angle to catch the full sun. XO-1.75 still wouldn't do anything. I really wanted to replicate Richard's "show" with the idea of doing it at SCaLE 12X in February. But, then, it is usually pretty foggy or rainy near LAX in Feb when they have SCaLE.
Thanks again. More suggestions of fun things to try would be welcome. I guess I'm in my "second childhood" (or maybe I never left the first one!)
Caryl (aka GrannieB)


> To: support-gang at laptop.org
> From: pgf at laptop.org
> Date: Fri, 2 Nov 2012 08:30:39 -0400
> Subject: Re: [support-gang] Questions About Solar Panels
> 
> james wrote:
>  > G'day Caryl,
>  > 
>  > Mike is right, some panels are incompatible with an XO-1.  They just
>  > won't charge if the sun is too bright.
>  > 
>  > To discharge the batteries, one way is to break into the ok prompt, and
>  > leave it on there.
>  > 
>  > To answer your questions though,
>  > 
>  > On Thu, Nov 01, 2012 at 10:27:31PM -0700, Caryl Bigenho wrote:
>  > > 1) Why the XO-1.75 would not even complete the start up using the
>  > > solar panel with the battery out?
>  > 
>  > Because there was insufficient power from the solar panel.  You might
>  > fix this by either (a) using a more powerful solar panel, (b) tilting
>  > it toward the sun, or (c) wait for midday sun.
> 
> and remember, leaving aside richard's starring role in that solar-only
> 1.75 video last year, the laptops aren't really meant to run on just
> solar alone -- the battery provides stability, by making up for small
> dips in solar output from clouds, etc.
> 
> it _might_ also be the case that you have early hardware -- we paid
> a lot more attention to solar operation on 1.75 than on the earlier
> laptops, and some of the charging circuitry might have changed early
> on.  richard will remember.
> 
> paul
> =---------------------
>  paul fox, pgf at laptop.org
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