循迹小车控制程序，懂程序的一看就明白，硬件用51系列单片机，直流电机驱动芯片，发光二极管，光敏电阻和比较器。-Car tracking control procedures, understand the program see at the hardware using 51 series, DC motor driver chips, light emitting diodes, photosensitive resistors and comparators.