基于单片机的智能电风扇 　　① 风速设为从高到低5个档位，可由用户通过键盘手动设定。

　　② 当温度每降低2℃则电风扇风速自动下降一个档位。

　　③ 当温度每升高2℃则电风扇风速自动上升一个档位。

　　 ④ 用户可设定电风扇最低工作温度，当低于该温度时，电风扇自动停转。-① Based on SCM' s smart fan speed set to low five stalls, set manually by the user through the keyboard. ② When the temperature is 2 ℃ for each fan speed reduces automatically drop a gear. ③ When the temperature is increased by 2 ℃ fan speed is automatically increased by a stall. ④ user can set the minimum working temperature of fans, when lower than the temperature, the fan automatically stop.