In this design system also adopt PWM technique control DC motor drive chip L298 to realize the accurate control of motor rotation speed, rotation direction, Start, Stop and etc operating position.

• 采用脉冲宽度调制技术控制直流电机驱动芯片L298，以实现对电机的转速、转向、启停等多种工作状态进行快速而准确的控制。采用红外光电传感器实现检测电机速度和画板上黑色曲线轨迹。