Automatic Fan Control circuit
The automatic fan control circuit operates by monitoring the temperature of its environment and activating a 12V DC fan when the temperature exceeds a predetermined threshold. The core component of this circuit is a temperature sensor, which can be a thermistor or an integrated temperature sensor IC, that provides a voltage output proportional to the ambient temperature.
The circuit includes a variable resistor, VR1, which allows the user to set the desired temperature threshold. When the temperature rises above this threshold, the sensor outputs a signal that is processed by a comparator or microcontroller. If the temperature exceeds the setpoint, the output of the comparator or microcontroller will switch on a transistor or a relay, which in turn activates the fan.
The fan continues to operate until the temperature drops below the threshold, at which point the circuit will deactivate the fan to conserve energy and reduce noise. The circuit may also include additional features such as LED indicators to show the operational status of the fan or a hysteresis control to prevent rapid on-off cycling of the fan.
Power supply considerations for this circuit involve ensuring that the fan and control circuitry are adequately powered by a stable 12V DC source. Proper heat dissipation methods should also be implemented to ensure reliable operation of the fan and control components. Overall, this automatic fan control circuit is essential for maintaining optimal temperature conditions in various electronic applications, enhancing performance and longevity of the components being cooled.Automatic Fan Control circuit. This circuit is ON / OFF 12V DC fan or die CPU fan factory IF temperature above normal again temperature.You Can Feed the temperature of VR1. This circuit uses. 🔗 External reference
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