[support-gang] XO brightness key operation

[forster at ozonline.com.au]

> On Mon, Apr 09, 2012 at 01:21:20PM -0400, Paul Fox wrote:
> > nicholas wrote:
> >  > Is there a way to read the current value of the 1.75's ambient light
> >  > sensor? It'd be neat if that could be displayed by an activity.
> > 
> > there is.  turtleart can do this, i believe.
> >     http://wiki.laptop.org/go/Light_Sensor#Programming
> > 
> As I have a tiny understanding of LEDs, I recall something about being able to detect light with them.
> Are any of the LEDs on the XO-1 or XO-1.5 able to do this? I'm guessing no, but
> I'd thought I'd 'throw it out there' to see if it was possible.
> Since it was done for the xo-1.75, that would imply support and thus even if it
> was possible on the other units, it would not be supported.

On the XO-1 and 1.5 it is possible to use the camera as a light sensor, see Turtle Art

Tony