Simple Temperature Control Fan Speed circuit diagram

Today I will show you how to make a very simple temperature control fan speed circuit. I use very minimal parts and works in real life.

This circuit change 12 volts DC fan speed by temperature. The hotter the temp, the faster fan speed. The circuit principle is a voltage divider between T1 and 20 K potentiometer. When temperature increase, the Thermistor resistance decrease and make the voltage set point between T1 and R1 increase until it is higher than a Mosfet Vgs threshold and make a Mosfet change to ON state and conduct current to a fan.

Below picture is the parts you need.
Note: T1 is 10 K thermistor

See the video below that shows how it work and full circuit diagram and the important of C1


Popular posts from this blog

5 watts amplifier TDA7056A wiring diagram

How to add power supply filter capacitor to amplifier board.

How to connect volume control to an amplifier

10 watts 8 ohms class d amplifier pam8610 sound test

PAM 8403 board amp wiring diagram

simple bass booster circuit diagram

Hall effect sensor wiring diagram and test video

how to make condenser microphone pre-amplifier

how to make an automatic faucet

tda 7052B full wiring diagram, easy to understand