The backlight appears to be just some LED's, controlled by two switches.
One, turns the light off.  The other, well, turns the light off...one's
called a shutdown line and the other is the PWM line.   Allowable voltage i=
s
"5 min, 7.4 typ., and 20.0 max."  125 mA at 7v and 240 mA at 20.  If anyone
really wants to pick it apart, they can find LQ050W1LA0A on Sharp's site an=
d
get the data sheet.

Just keep in mind that the hardware design isn't going to change.  Not on
this cycle, anyhow.


On Thu, Jun 23, 2011 at 6:21 PM, Kerry Wentworth <
kwentworth@skunkworksnh.com> wrote:

>
> You could set up a 10mS interrupt interval, and in the interrupt set up
> a CCP to turn off the backlight after an appropriate delay.


I didn't see the point of this initially; now I do.  The idea of doing the
"on" period in hardware is
attractive.  If the timer/CCP really can reset the pin like that.  Some mor=
e
reading of
the CCP section to follow.
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.