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Automatic room temp controller

During summernights, the tempis initially quite high. As time passes, the temp startsdropping. Thus,initially the fan or cooler needs to be run at full speed.Also, after a personfalls asleep, one has to get up again and again to adjustthe speed of the fanor cooler. This project is presented here control thespeed of the fanautomatically with the room temp variation.In this circuit, the temperaturesensorused is a thermistor and it is designed as a voltage divider. Theoutputvoltage is directly proportional to the room temp. The output voltageofthermistor has given to a dc MOTOR through an op-amp based PWM. PWM varieswith variation of temp. Thus DC motor speed varies with temp.

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Cost :- Rs. 2000
(Including GST & Courier)
(Refund available)
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