The project we need to make is an Electronic Queue Management System.
or simply you can call Token Display System. We need to make a main display board consisting of 2 x 4" Seven Segment LED display + 89S52 Micro controller, Memory, and RS485 control. There should be an option to add one or more single digit pcb to make it as a 3 Digit or 5 Digit token display.
There should be a provision for 3 or 4 button remote control to make the disply count UP/ DOWN / CALL and / RESET. And a 16 buttons full function remote control with LCD or LED display by 2 wire communicatiion ( RS485 )
There should be an option to connect more than one display and more than one remote controls.