The fan heat sink adopts 4*4 large wind silent fan design, and the wind speed can be controlled and controlled by GPIO, which can effectively reduce the temperature of the raspberry pie when working. <br> Fan control code, for reference only:<br> Open fan code<br> #!/usr/bin/env python<br> # -*- coding: utf-8 -*-<br> Import RPi.GPIO as GPIO<br> GPIO.setmode(GPIO.BCM)<br> GPIO.setup(22, GPIO.OUT)<br> #IO22 Output HIGH to turn on the fan<br> GPIO.output(22, GPIO.HIGH)<br> -------------------------------------------------- -------------------------------------------------- ------<br> Turn off fan code<br> #!/usr/bin/env python<br> # -*- coding: utf-8 -*-<br> Import RPi.GPIO as GPIO<br> GPIO.setmode(GPIO.BCM)<br> GPIO.setup(22, GPIO.OUT)<br> #IO22 Output LOW to turn off the fan<br> GPIO.output(22, GPIO.LOW)<br>