how to make fan controller?

how to make a fan controller?: 

how to make fan controller circuit diagram. here used PTC C831 to control the room temperature.  this PTC works as a resistor. PTC resistor depends on temperature. this PTC is used in this automatic fan controller. 

Automatic fan controller

Negative Temperature Coefficient (NTC) thermistors have less resistance at higher temperatures. sometimes we need to control our fan switch according to our temperature. for this we can use this circuit as an automatic switch for the rooms.



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It's me. I like electronics. I like to repair electronics. I like to make circuit diagram. it's me who sleep with electronics. electronics is my dream. Always resistor diode capacitor and transistor playing in my dream. It's me (Ramen Bairagee)