I am going to control a fan using PWM signal. PWM is generated by a 555 IC. The duty cycle rate of the PWM is controlled by a PTC thermistor. And an NTC thermistor decides when to turn on and off the fan by generating a digital signal by using a comparator.
How do I interface the comparator output and the 555? I feel like it will be done through the "control" pin of the 555, but I can't find how to.
Note: The resistor and capacitor values have not calculated yet. Please ignore those all 100k\$\Omega\$ values.