“Quality build with attention to detail. Code repository that goes with the fan is top notch too. I had a temperature monitoring script with blinking led status running in literally five minutes!
Highly recommended.”
“A bit noisy when it spin at full speed, would be nice to leverage the PWM feature of the GPIO18 (start a full speed for 1-2s to boot the fan and then reduce the duty cycle).”
“This is an AWESOME little fan, which fits the Pibow Coupé cases wonderfully. Had to gently pry the pins out a little so that they would make contact properly with the Pi connector, but once done and after the software was installed, we have silent, cool running.”
“An indispensable add-on for any Pi 3-4 being put through demanding workloads. The chips get hot, and when they do, suddenly your Pi's performance is decimated by frequency throttling. Heat-sinks alone won't prevent this (at least, not the discrete individual-chip heatsinks I tried). To prevent throttling, you'll need a fan.
The beauty of this fan is that it can be controlled through the software library written for it, which is easy to use (it comes with an installable example service that does the basic job most people will want and is easily tweakable to your tastes) and has lots of scope for more ambitious tinkering. At its simplest, this means the fan is only activated when things get hot. On my Pi 4 with the recommended settings, this meant the fan only span up for ~20 seconds every 3-5 minutes even when running Firefox in a full KDE5 desktop. And it's quiet enough I stopped even noticing it doing so after a while! (Note: I was also using heatsinks, for which a GPIO booster header is required to leave room under the fan for them.)
The RGB LED and (fiddly) push-button can also be fully controlled using the library, which opens up lots of additional possibilities for use. I'm looking forward to exploring this!”
