I wish to have permanent display on when a charger is plugged to the phone and timer off when no external power source is connected to the phone.
			
			
			
				Hi,
  sounds as a good idea. also into car and also for my home developing :) So added ...
			
			
			
				I just made a clamp for my S3mini in my car, so I am happy, that the display will be on, when connected to external power !