走马观花

Digital clock design based on 89c51

Overview

After power-on, the clock chip is first initialized. The date and time data of the clock chip is read first, and then displayed on the LCD1602 screen. Then, there are four buttons. K1 is the mode switching button, which can be used in hours, minutes, and seconds. Sequential switching in the setting mode, it is only effective when pressed in the setting state. k2 and k3 are addition and subtraction buttons, which can perform time addition and subtraction operations in the corresponding mode. It is effective only when pressed in the setting state; k4 is LCD1602 Press the time countdown button to set the timing time. When the time is up, the buzzer circuit will be triggered.

Design Files

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Update:2025-05-08 23:46:05

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