Large size also display the prices are expensive, but they also have a limit if you make yourself big size LED display can achieve. Led diplay pic16f876 used in the control circuit of the LEDs are driven by uln2803... Electronics Projects, Large 7-Segment Display Circuit ULN2803 PIC16F876A "ccs c examples, microchip projects, microcontroller projects, pic16f876 projects, " Date 2019/08/01