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Fan speed controller based on STDS75 or STLM75 digital temperature sensor and ST72651AR6 MCU

Posted: 04 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:controller fan? sensor temperature? MCU?

This application note describes the method of defining the system for regulating the speed of the 5Vdc fan using an ST72651AR6 MCU and digital temperature sensor STDS75 or STLM75.

The sensor measures the temperature data and communicates this data to the microcontroller. Based on this temperature data, the microcontroller issues a PWM signal with varying duty cycle to the fan for regulating its speed.

The key features of the system are: microcontroller with I?C interface and PWM peripheral to communicate with the sensor and for regulating the fan speed; digital temperature sensor to measure the ambient temperature; and 5Vdc fan to show the speed regulation.

View the PDF document for more information.

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