自动循迹小车控制器采用STC89C52单片机，采用LCD1602液晶显示屏显示当前小车速度和里程等数据；电机正反转采用L298N集成电路模块来驱动，也可以直接采用三极管组成桥式驱动电路来控制。里程检测传感器采用霍尔传感器或光电发射接收对管。-Automatic tracking car controller with STC89C52 SCM LCD1602 LCD display shows the current car speed and mileage data　motor reversing L298N IC module to drive, you can also directly use the transistor to form a bridge driver circuit to control. Mileage detection sensor using Hall sensors or optical transmitting and receiving on the tube.