This moving LED Display use four 5×7 Dot-matrix bar along with Max-6952 driver IC and AT89C51 Microcontroller.Max-6952 is LED dot-matrix driver IC from MAXIM. Max-6952 can drive up-to 4 Digits (140 LEDs). Included static RAM that stores each digit, as well as font data for 24user-definable characters and built-In ASCII 104-Character.This max6952 IC is SPI Compatible. This Max-6952 IC can drive four single Colour matrix display or two bicolour matrix Display.