Schematic diagram of curtain-type digital display circuit-EEWORLD

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　　Use the P0.0/AD0-P0.7/AD7 port of the AT89S51 microcontroller to connect the ah terminal of the digital tube. The S1-S8 of the 8-bit digital tube controls the bit selection terminal of each digital tube through the Y0-Y7 of the 74LS138 decoder. The P1.0-P1.2 of the AT89S51 microcontroller controls the A, B, and C terminals of the 74LS138. "12345678" is displayed cyclically from right to left on the 8-bit digital tube. The effect of the curtain can be seen relatively smoothly.

　　1. Connect P0.0/AD0-P0.7/AD7 in the "MCU System" area to the ah port in the "Dynamic Digital Display" area with an 8-core cable;

　　2. Connect Y0-Y7 in the "38 Decoding Module" area to S1-S8 ports in the "Dynamic Digital Display" area with an 8-core cable;

　　3. Connect the P1.0-P1.2 ports in the "MCU System" area to the A, B, and C ports in the "38 Decoding Module" area with three wires;

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