SainSmart Megatronics LCD12864 Intelligent Controller LED Background Light Control Circuit for Arduino Mega 2560 UNO R3 SainSmart Megatronics LCD12864 intelligent controllerLED background light control circuit. This controller is 100% compaitble with original design . If you use a print job at night and parts department, which means that the new modifications LCD backlight would be suitable for your LED background light control circuit, a small function of intelligent controller, With pin short time to decide on all LED turn or steering 30 seconds