YahboomRaspberry Pi Quiet Cooling Fan for Raspberry Pi 5 4B 3B+ 3B Intelligent Temperature Control Programmable RGB（OLED Display Include）

Honestly, i like this fan set up. the fan is nice and quiet, the leds are bright and the oled screen works as advertised. the only real issues ive had is that the instructions are pretty hard to follow, getting certain functionality out of it requires some know how so i wouldnt suggest this for someone just starting out unless programming is your goal. and when you try to switch colors/effects sometimes the board displays the wrong color/effect or shuts the lights off all together. If you have had your pi for a while and have a good grip on how to code and or are a someone looking for a good introduction too then this fan is for you. i would also like to add that this hat and raspberry pi 3b+ fit perfecty inside a zebra case from c4 labs with the tall top hat expansion kit and some kind of open top. they have a few with wood raspberrys in them, get the larger one.Edit: after having the board and trying to code it best i can, i can say that the programming provided and the tutorials need desperate attention. the "effects" besides breathing and water lights are pretty much the same effects. you can pretty much set it to a single color in any color with the right rgb code. if i wanted say neon green (57,255,20) in water or breathing? as it stands now not going to happen. wouldnt hurt for them to add a script to kill the lights when desired. it can work with retropie, just not easily. you have to manually start the fan by putting the start.sh script in retropiemenu and hitting control+ c to get back to es. i took a star away simply because of how difficult this product is to get going, if they update the programming and/or tutorial ill update my reviewUPDATE 6/8/2020: They have added python scripts for the hat, and that makes it a bit easier to program but the same limitations are there. With no definitions of what the codes do, or even what line controls what led or color ect, it just makes it easier to run their scripts and only slightly easier to impliment your own code. Till things are broken down a little more im gonna have to leave it at 3 stars because this is no easy thing to program, even with python codeEdit 7/3/2021Big improvments made by a github user named dogweather. Converted the python to python3. Replaced the fan on it with a 5v noctua, placed over a low profile ice tower heatsink and crammed into a custom made c4labs case with 56 other leds. The yahboom rgb fan hat was well worth the investment and as you can see from. Image 1, the hat keeps it nice and cool. And from picture 2, the lights are super bright.

I have a Pi 4B and it was running mid 50C idle when I first got it without any cooling. I find that upgrading the Pi firmware using rpi-upgrade helped a lot in lowering the temp into the high 40C. The next big cooling upgrade was adding a full metal passive heatsink case like the Geekworm low-profile case. This lowers the temp quite a bit into the low 40C. The whole case feels quite warm which is probably a good thing since the purpose of a heatsink is to create surface area to dissipate heat. The next logical cooling upgrade would be to add an active cooling fan. This is the reason I chose the low-profile Geekworm case because it is compatible with other RPi hats. I chose the Yahboom fan hat because it is programmable and has a cool OLED display. If you're a Linux beginner you may have some trouble with the instructions. I didn't have too much trouble with the Python tutorials, but I did had to install some additional packages to my Raspbian Lite image - like python-pip and Adafruit-BBIO. I kept the fan control and display features but turned off the color LEDs because they're quite distracting at night. The fan does pretty well in moving air and keeping the case cooler. It lowered the PI temp into the mid 30C. At idle (with only Pi-Hole and 2 active Wireguard connections) the temp is stable at 34C. Running cpuburn stressing the CPU at 100% the temp is stable at 38C. The display is also very convenient, showing various information at a quick glance. Overall I'm pretty satisfied with the product.

The product itself is very good, the fan cools very well and is very quite. However you need to install some python software for this board to function, without software fan does not spin at all. And instructions to do so are downright awful and in fact does not work as written. It's easy to figure out if you have some experience with these sort of things, otherwise you will be lost.

I got interested in this when looking at Yahboom's Rosmaster X3 Plus. It is a great cooling hat with nice lighting effects. Their code worked perfectly and was easy to load. The code allows you to vary the fan speed for different temperatures and also change the RGB lighting effects. If you want, you can use the led color to indicate the current PI CPU temperature which is great when you are not close enough to see or hear the fan. Lots of support documentation!

The media could not be loaded.  Given the circumstance, the fan hardly has need to spin up since my Pi is shrouded inside Geekware's robust yet low-profile CNC Aluminum case. There's plenty of metal to soak up the BTU's the Pi4 puts out. Still, if I wanted more fan, it's not hard to change parameters, lowering temperature thresholds for greater percentage of fan speed, & so on.But it's the LED light show that's the real eye-candy, with a bit more coding you may create a regular Tokyo by Night light effect. This HAT purposefully teaches you coding as you tweak the colors & sequences to your hearts content.One surprising eye-catcher is the OLED status display giving out constant system condition, a useful indicator of the Pi's system health. I'm easy to please, I just programmed a lower threshold temp & set the light show to cycle through it's entire sequence menu. Capable, educational, functional & FUN!

The installation manual did not include a secret code needed to download the software, the online manual of their website was mostly in Chinese and Google code not translate all of it, the s/w download required some kind of special code which was not included with the manual. All in all a waste of money and time

Fan works great and I love the programmable light. I also oled display.

I purchased this for the fan and control to save me from building my own. But the fan is SLOW and moves very little air. I even wondered if this could be a 12volt fan running at 5volts. Will be returning this.