[Abstract] This design is the fan system of an automatic temperature control,it is to make the ordinay fans become more intelligent,it has a sensitive temperature detection and display functions,as a control is STC89C52RC microcontroller core,through the temperature sensor DS18B20 data collection on the ambient temperature in order to establish a control system that allows the fan speed changes with the external temperature automatically adjust the speed,to achieve "high temperature,wind,low temperature,wind speed and weak ".
[Key words] SCM; temperature sensor; fan