将冒号后的文字翻译成英文：社会在不断进步人们的需求也在不断提高市场也在不断变化。随着高科技应用的不断发展智能化技术在电子产品领域的应用意义愈加深远。现在家用电器也越来越偏向智能化已经出现了智能洗衣机、智能电饭锅和智能电磁炉等。这些智能化家用电器都有一个共同的特点就是利用单片机作为中央控制单元。同时随着电子技术的发展人们生活中的照明工具也在发生着巨大的变化。从普通电灯、白炽灯到现在比较流行的LED灯

Society is constantly advancing, people's needs are constantly increasing, and the market is constantly changing. With the continuous development of high-tech applications, the application significance of intelligent technology in the field of electronic products is becoming more and more profound. Now, household appliances are also becoming more and more intelligent, with the emergence of smart washing machines, smart rice cookers, and smart induction cookers, etc. These intelligent household appliances all have a common feature, which is to use a microcontroller as the central control unit. At the same time, with the development of electronic technology, the lighting tools in people's lives are also undergoing huge changes. From ordinary electric lights and incandescent lamps to the now popular LED lights, all reflect the progress of human technology and the development of society. With the increasing seriousness of environmental issues and the reduction of energy, energy-saving and environmentally friendly desk lamps have gradually become a necessity in people's lives. Therefore, it is very necessary to design a multi-functional and environmentally friendly intelligent desk lamp.

This article introduces an intelligent desk lamp design based on PWM dimming. This desk lamp combines microcontroller technology and PWM dimming technology to achieve adjustable brightness. When the human body is within the range of the desk lamp and the ambient light is weak, the desk lamp will automatically sense and turn on the light, and the brightness of the light will automatically adjust with the change of ambient light. Once the person leaves the range of the desk lamp, the desk lamp will automatically turn off after 30 seconds. This design can achieve the effect of eye protection and green energy saving through automatic adjustment of brightness and human detection to control the desk lamp switch. After the lamp is turned off, the sound sensor can detect sound vibrations in the environment. If it reaches the set threshold, the lamp will turn on. This design can enhance the functionality of the desk lamp, so that the lamp can be turned on even when the human body is not within the range of the lamp. At the same time, in order to expand the applicable range of the desk lamp, the design also includes manual mode control and local area network control. In the manual mode, the brightness of the desk lamp can be adjusted by pressing the button; in the local area network control, the ESP8266 module is used to realize the interaction between the mobile phone and the microcontroller, and the desk lamp can be remotely controlled through WIFI using the mobile phone. In this way, even in some special situations, the desk lamp can still be used