"220V Cooling Fan" use PIC16F873A microcontroller as the main core of the device, resulting in PWM pulse signal to control the frequency and infrared signals PIC16F873A own integrated analog-digital converter module easily achieve effective data collection. Also design not only effective solution to the conventional "220V Cooling Fan" many shortcomings on the market, can be easily adjusted to achieve remote controlled fan, the fan also can achieve their smart regulation, reducing energy consumption. In this circuit, the current design of the introduction of AC-DC conversion, to achieve a different working voltage of the device, the smooth and safe work under the same power, effective solution to the "220V Cooling Fan" choice of different specifications of the power supply. The design to meet the people's normal demand, to people's lives further convenience and economy.