Fan speed regulation circuit based on real-time temperature monitoring

The utility model relates to a fan speed regulation circuit based on real-time temperature monitoring. The fan speed regulation circuit comprises a power supply circuit, a temperature sensor, a temperature conditioning circuit, a triangular wave generation circuit, a polarity selection circuit, a comparison circuit and a signal isolation output circuit, the temperature sensor is attached to a part needing heat dissipation and outputs a real-time temperature signal to the temperature conditioning circuit, the temperature conditioning circuit converts the temperature signal collected by the sensor into a level signal, the level signal is compared with a triangular wave generated by the triangular wave generation circuit after passing through the polarity selection circuit, and a PWM control signal is obtained. And the signal isolation output circuit controls the fan to operate. Pure hardware design is adopted, the cost is low, the size is small, control is accurate, the response speed is high, the rotating spee