smart controller With LED turn on control 12864 Version

Added a small function which is LED backgroud light control circuit to smart controller , with shorting the pins to decide the LED turn on all the time or turn on 30 seconds and than turn off automaticly.IF you used to start the printing jobs at night and get the parts at the next morning , that means with the new modification LCD back light will not annoying you any more ,you can make the time of light turn on longer or shorter by adjust the TRIMM R4 100K form 10s to 2mins. Hope you will like t