RPI4 Bare fan mount 40mm

thingiverse

A Simple Naked Fan Mount. This Works Well for a Raspberry Pi Under My Desk. I Dislike Complex Cases That Never Print Correctly and Don't Fit Properly. So, I Prefer to Keep It Simple. This Design Uses a 3-Point Mounting System Allowing You to Plug the Fan into the 5V / GND Headers on the Raspberry Pi. In My Example, I Use a Step-Up (Boost Converter) but This Is Only to Achieve Maximum Speed. At 5V, a Noctua Fan Runs Quietly but a Bit Slowly. This Is an Example of the Boost Converter I Used: https://www.diyelectronics.co.za/store/switch-mode-modules/1464-dc-dc-boost-step-up-2a-2-24v-with-micro-usb-input.html?search_query=boost&results=99 **Warning!** If You Choose to Use a Boost Converter, Be Sure to Adjust It Before Soldering the Fan On, Otherwise You May Damage the Fan. You Will Need to Search for Screws That Fit Properly. I Found Old Servo Attaching Screws Work Well. Unfortunately, This Is Not 3mm Holes Through the Pi.