AT89C51 Scrolling LED Circuit Operation: Keypad’t the values ​​entered the program through is continually monitored, “*” key is pressed unless the display of the first letter that section required all letters appear, but the desired letter or number after... Electronics Projects, AT89C51 Keypad Controlled Scrolling LED Dot Matrix Text "8051 example, avr project, keil example, microcontroller projects, " Date 2019/08/02