Common anode 8 segment digital tube display circuit diagram

LED light-emitting diode

Dynamic Scan Display: The following figure shows the dynamic scan circuit diagram of 6 common anode LEDs. In the figure, port B of 8155 is connected to all dp(sp), g, f, e, d, c, b, a leads, and each LED control terminal G (ie, 0, 1 inside each digital tube shown in the figure) , 2, 3, 4, 5) is connected to the C port of the 8155, so the B port is a letter port, and the C port is a word port, because the CPU can control whether each LED is lit through the C port.