Ac Fan Speed Control Using Arduino
Monitors temperature and adjusts fan speed.
Ac fan speed control using arduino. Lm35 is a precision integrated circuit whose output voltage is linearly proportional to celsius centigrade temperature. Now that s the disclaimer out of the way on to your question. Controlling the speed of an ac motor is not an easy undertaking and messing around with mains voltages if you re not experienced and know what you re doing can be fatal. Circuit diagram of the temperature based fan speed control monitoring with arduino lm35 is shown above.
4n25 zero crossing detector 10k potentiometer. Unlike dc you cannot use pwm to control the average power of ac. In this project we will demonstrate arduino ac fan speed control using triac. In previous tutorial we controlled the dc fan speed using pwm.