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schematic diagram for variable speed control fan with temperature sensor

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kbtan

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can u all pls help me draw/find the schematic diagram for variable fan control fan with temperature sensor using at89s51 microcontroller
 

btbass

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You could consider the MAX6641 IC. It is a fan speed controller with integrated temperature sensor. It is I2C controlled so you can use the at89s51 to control it.
Application circuit is in the data sheet.
 

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