Dot Matrix moving display using pic16f877A & 74hc595

This dot matrix moving display message board will be of 8, 5X7 dot matrix which will be able to display 7 character at a time. this is a stand alone system which means we can change the string without help of any other host computer of pc. you can able to change the string with help of four buttons only a successful pcb and circuit had been made. I will display pcb and working on the 2nd post of this project currently i am showing only the circuit diagram of this project, it is able to store 333 character with help of serial eeprom 24c02 which i think is much enough for the long string.

components used

pic16f877a (1), 74hc595(5), 280 led’s, 24c02(1), uln2004(1), 7805(1), step down transformer(1), some caps and res.