Video shows testing of temperature dependent fan. A 10 kilo ohm N.T.C. thermistor is used as a temperature sensor in the circuit. notice that when the cigarette lighter is brought close to the thermistor the LED indicator glows more brightly i.e. the fan speed also increases. No PWM is used in the above project. I may design a better one using an IC. Kindly keep watching!
Post time: Jun-12-2017