Argon Mini Fan

This is Argon40's affordable and compact cooling option for your Raspberry Pi 4 - the Mini Fan!

With direct contact to the CPU via the heatsink section of this add-on, your Raspberry Pi benefits from both active and passive cooling - with the option to control the fan via software and via the onboard switch.

The hardware switch at the front of the fan offers three settings - ON, OFF and PWM. This is great for different scenarios where you may require silent running, ultimate cooling performance or a balanced temperature-based cooling setup.

By editing software settings you can also select when the fan will start based on the temperature of the CPU (when in PWM mode). The fan also only consumes the first 12 of the 40 GPIO pins, allowing more project flexibility than some other cooling fan options.

For more features including a shutdown button, check out the larger Argon Fan HAT.

Fan Switch Settings

• ON - Mini FAN will always turn ON when the Raspberry Pi is powered
• OFF - Turns OFF the Mini FAN
• PWM - Sets the Mini FAN into a Pulse Width controllable mode

Setting the PWM Threshold

The instructions below will start the Mini Fan at CPU Temp 55 degrees (tempt 55000). You may set your desired fan initiation temperature as per your requirements:

1. In Raspberry Pi OS, open a new terminal window

2. Enter sudo nano /boot/config.txt

3. Add the following line:

dtoverlay=gpio-fan,gpiopin=18,temp=55000

4. Save changes and exit by pressing Ctrl+X

Resources

• User Guide