A Raspberry Pi doesn't exactly need a cooling fan. But is cool to see a Pi programmatically control a fan. Moreover, a cool breeze now and then doesn't harm.

What may really harm a Pi, however, is a fan directly connected to the GPIO. A simple transistor based circuit is used to power the fan externally.

Save the file cooling_fan.py at a convenient location e.g. /home/pi/cooling_fan.py

Update variable values in the file

BCM_output_pin=18   #GPIO pin for PWM output
ontemp=60           #in deg C      
offtemp=55          #in deg C
max_fan_speed=80	# maximum speed in percent 0-100

Execute and test

sudo python /home/pi/cooling_fan.py

Add to cron

• Saugata Roy - Initial work - saugataroy

This project is licensed under the GNU General Public License - see the LICENSE.md file for details

• Hat tip to anyone who's code was used
• Inspiration
• etc