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Great tutorial. I come asking a question. I've done both of these kinds of circuits in the past with success. Now I'm working on a TFT LCD I would like to integrate the same concept on.... lights go out in the room and the screen dims. My question is, how can this be wired then you have access to only the ground pin of the LED's? Pos is shared on the PCB for the screen, ,touch and backlight, behind the screen and not accessible to break out just the LED's.
Dead/ not monitored instructable?