Quote: Originally Posted by Kamakazie2
0v is brightest setting..
So it will operate like this
Monitor set at Full Dim
Lights are off: Relay is in the open position giving 0v to circuit causing backlight to be at max.
Lights are on: Relay is closed causing the origninal circuit of 3.3v (set at full dim) to dim the screen
Relay installed and fully funcitonal.. just cut 1 wire and add a relay and you have full bring to full dim when lights come on..