RaspberryPi Fan

[CiZeR]

Hi guys,
I am new here so I dont really know if I am in the right place.

I've RaspberryPi 3b+

I got a problem with my fan, it's a fan for RaspberryPi and when I plug the fan to the raspberry the goes 100% all the time.
Very noisy, and it's good of course that the fan is always on 100% speed, there is a way to make him be on 50%?
or just turn on when the raspberry need?

Thank you so much!

[jahboater]

Try using it without the fan!

One of the best features of the Pi3B+ is the advanced thermal management.
IMHO no fan is ever needed, regardless of the load.

A passive heat sink helps avoid throttling if your workload is extreme and sustained for more than a few minutes.

There are several cases on the market now made out of aluminum where the case itself acts as a large heat sink.

[ShiftPlusOne]

You could connect it to the 3v3 line instead of the 5v line. Alternatively, Noctua have nice quiet fans if you want to overspend on one.

[HawaiianPi]

Alternatively, Noctua have nice quiet fans if you want to overspend on one.

Yup, Noctua fans are awesome. Not cheap, but worth the price. You definitely won't need a heatsink no matter how hard your 3B+ is pushed. I can run CPU Burn continuously on my 3B (not +) with no heatsink, cooled by a Noctua NF-A4x10 5V 40mm fan that I can barely hear (58C max).

An even better solution is to put your 3B(+) In a Flirc Gen2 case.

The case itself acts as a huge heatsink and keeps the Pi cool without the additional noise or power requirements of a fan.

[procount]

With a bit of extra hardware you can control the fan speed based on the temperature.
See viewtopic.php?p=888016 as an exmaple.

[CiZeR]

You could connect it to the 3v3 line instead of the 5v line. Alternatively, Noctua have nice quiet fans if you want to overspend on one.

Can you explain me how to do it? where do I plug it?

With a bit of extra hardware you can control the fan speed based on the temperature.
See viewtopic.php?p=888016 as an exmaple.

After I am doing that the board need to stay right?

[LTolledo]

There is a "simple hack" to silence a 5v fan...

me thinks it running loose in the internet..... need to find and catch it....

[HawaiianPi]

There is a "simple hack" to silence a 5v fan...

me thinks it running loose in the internet..... need to find and catch it....

Well, you could use a 12V fan on 5V. Some may not run on 5V, but the ones that do will be very quiet. I used to have a double stack cooled by a single 12V 80mm fan that made almost no noise and worked very well. It kept both systems (and the SSD on the Pi) nice and cool.

This is a shot of that configuration when I was testing it (fan on top is a 40mm Noctua, but it's not connected for the test).

Pi-Tinker_double-trouble.jpg (119.6 KiB) Viewed 922 times

[mrreality13]

try this

[HawaiianPi]

I thought the 3.3V output was limited. Running a fan on that seems like a bad idea.

[LTolledo]

due to the "scare" that some fans connected to the GPIO headers ([5v or 3.3v] and ground pins) "killed" some of our forum-mate's RPis, I've made it a point never to directly connect any fan (or any inductive load for that matter) to any RPi GPIO header pins.