基于光电开关的竞速小车计时系统设计

Design of Racing Car Timing System Based on Photoelectric Switch

文中介绍了基于STC89C51单片机对于光电开关竞速小车计时系统的设计与实现,对系统主要硬件电路以及程序进行设计。该系统主要采用了74HC595和ULN2803实现对大尺寸数码管的静态显示,并给出了具体实现思路和设计过程,实验结果表明,系统运行稳定,显示清晰;实现了对竞速小车精确计时。

This paper introduces the design of the racing car timing system based on photoelectric switch with STC89C51 microcontroller,and of the main hardware circuit and program.This system mainly adopts 74HC595 and ULN2803 to realize the static display of large size digital tube,and provides the detail design process.The experimental results show that the system is stable with clear display,which realized the accurate timing of racing cars.