The design as a temperature-controlled fan system, with sensitive temperature sensing and display capabilities, the system microcontroller as the control platform AT89C5 fan speed control. User-configurable high and low temperature, the measured temperature value is between the high and low temperature, when the weak windshield opens the fan, when the temperature exceeds the set temperature automatically switch to wind file, when the temperature is less than the set temperature, fan shut down automatically, control the state with the outside temperature dependent. Established by the high and low temperature value is stored in temperature sensor DS18B20 internal E2ROM, the power-down can still be saved after the last set value, performance, stability, control and accurate.

温控自动风扇系统.doc

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