循迹小车程序，循迹小车由光电对感扫描轨道黑线，由51单片机控制小车沿轨道行走，本程序使用5个光电对管并用LM298驱动-Tracking the car program, tracking car by the photoelectric sense scan track black line from 51 microcontroller to control the car to walk along the track, the program uses five photoelectric tube with LM298 driver