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[[File:Adjust-fan-fan.png|none|How to adjust the fan speed|700px]]
Q6:Does the PWM cooling fan running or not?
A:
* 1. The fan is very silent, and it is not easy to hear the sound of the fan;
* 2. The fan is a PWM fan which dynamically adjusts the speed according to the temperature of the CPU. If the temperature of the CPU is low, the speed of the fan is extremely low, and it is not easy to hear the sound of the fan;
* 3. The fan hole of the NASPi case is not directly align with the fan, so it is not easy to find whether the fan is running. (We will adjust the position of the fan hole in the next version).
* 4. Only when the CPU temperature reaches 65 degrees or more, the fan will run at full speed, and you may be able to hear the sound of the fan;
* 5. The fan is controlled by the PWM signal. The fan will only run after the ‘python /home/pi/x-c1/fan.py&’ command runs successfully; you can run the following command to check whether the fan is running; sudo jobs
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