基于单片机的LED点阵时钟的制作

The production of LED lattice clock based on MCU

文章设计的LED点阵时钟采用5个点阵分别显示24小时计时方式的月日时分秒,用74LS138译码器进行列扫描,并添加74LS245芯片作为点阵屏幕的驱动,先利用Proteus进行仿真实现,最后做成电路板。实验结果表明,本系统原理易懂、电路简单、稳定性好。

In this paper, the design of LED lattice clock uses 5 lattice to display the time in the 24-hour respectively, with a 74LS138 decoder to scan for column , and adding the 74LS245 chip as the driver for lattice screen, according to make a simu-lation with Proteus and finally make the circuit board. The experimental results show that the principle of the system is easy to understand,and the circuit is simple with good stability.