基于单片机的多功能时钟控制电路

Multifunctional Clock Control Circuit Based on MCU

提出的时钟控制电路,是利用单片机AT89C2051的16位定时器做成电子时钟,并利用电子时钟的精确定时作用实现了实时控制。为了能够增加控制设备的路数,本设计还利用一片74HC374锁存器芯片扩展了5个输出端口,大大提高了电路的控制功能,满足了日常生活和自动化生产中所需要的多路多时控制要求。笔者利用本系统为某单位设计了一款"学校多功能作息时间控制器"。通过近2年的运行验证,工作稳定可靠,受到了使用单位的好评。

This paper presents a clock control circuit in which an electronic clock is made by a MCU AT89C2051 16-bit timer and real-time control is achieved by the electronic clock＇s function of precise timing. In order to increase the number of control equipments, the design also uses a 74HC374 flip-latch the extension of the 5 output ports, which greatly improves the function of the circuit control and meet the requirements of multi-channel multi-time control in daily life and automated production. Based on this system, the author de- signs for a department a muhi-purpose school schedule controller, which has been running for nearly 2 years with stability and reliability and which wins high praise from users.