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What is Automatic Temperature-Controlled Fan Circuit about?

This circuit uses a thermistor to sense room temperature and control the speed of a fan automatically through thyristors. An op-amp converts changes in temperature to voltage variations, which are amplified and compared to a reference voltage to produce pulse width modulation and control an optocoupler. This optocoupler then regulates the power delivered to the fan load, allowing its speed to vary linearly with temperature between 120V and 230V over a 14°C range. The circuit provides isolated and efficient

Author

sumathiloganathan

Language

EN