在基于51单片机的音乐播放器中，采用DH11温湿度传感器为硬件基础，通过其对周围温湿度的采集，控制音乐播放。单片机需外接+5V稳压电源，单片机工作时，用软件对定时器初值进行设定，从而得到所需要的声音频率；通过8位共阴极数码管，可显示温度；将单片机输出的信号放大，接入蜂鸣器即可发声。(In the music player based on the 51 single chip microcomputer, the DH11 temperature and humidity sensor is used as the hardware foundation to control the music playing through collecting the surrounding temperature and humidity. The MCU needs external +5V voltage regulated power supply. When the MCU works, the initial value of the timer is set by software to get the required sound frequency. Through 8 bit common cathode digital tube, the temperature can be displayed; the signal output by the MCU can be amplified and the buzzer can be sent to sound.)