Lcd

hi everyone.

i wanna to ask. its possible to add the light sensor to LCD function?
for example. The LCD it self have the backlight right.
so.can i add the light sensor for make the function of LCD backlight.
so that. the backlight will turn on automaticly when its dark.

Use a photo transistor, one with an infrared filter is probably better as it won't be activated by the backlight.