说明：  使用按键、数码管、蜂鸣器、五线四相步进电机、直流电机模块实现按键控制电机的风速档位，步进电机的转动以及倒计时之后自动关闭以及按键长按有效功能。
(The key, nixie tube, buzzer, five wire four phase stepping motor and DC motor module are used to control the wind speed of the motor by pressing the key, turning the stepper motor and automatically closing after the countdown and pressing the key for a long time.)