Now a days GSM Based scrolling LED light displays is very largely used display. Which is being used in the field like railway buses and other vehicles displayed their destination and source from where they have got started and the path followed by the vehicle to reach their destination. Similarly, some other uses are on the station, platform and airport etc. To display the message. The visibility of LED light is very good which is the best advantage of LED light. Due to availability of LED lights of different colours it excites us to work on that. Due to having different colours of LED it becomes very attractive. And having different colours its wave length are also different which make them good looking. Usually, we use 230 volt alternating source of supply to operate the LED scrolling light. This ac source is not directly fed to the scrolling light, by the use of rectifier circuit like centre tap and bridge rectifier and filter circuit. We convert the source into dc source and fed to the scrolling LED display. And the level of voltage is decrease by use of controlled rectifier and chopper circuit.

Keywords : GSM modem, Display board, Microcontroller, Assembly language etc