I find it amazing you were able to connect the fan to the 3.3V GPIO and not burn out the Pi.a7md0 wrote: ↑Thu Aug 15, 2019 8:22 pmHi, is connecting fan to the raspberry pi 3 b+ GPIO directly safe?
I have my raspberry in home network and the CPU temperature +60C, so I decided to add a small fan and some heat-sink from online retailer. First I added fan and connect it to GPIO 4 & 6 (5v), the fan worked fine for two weeks and then started to make very loud noise and vibration, my first though that it was bad fan. So, I ordered another fan and connect it to GPIO 1 & 6 (3.3v), and one week later the fan started to make loud noise and vibration just like the first one.
Is there something wrong I'm doing? Or both fans I got are just bad? Do I have to connect something extra to protect the fans, or it is the raspberry module itself? ( Note that when I move the top case where the fan is connected the vibration and noise start to reduce sometime )
The fans model is LD3007MS | DC5V 0.20A
The ones I have, and those I've seen advertised, are ten-fold that; 100mA-200mA.
Only rubbish fans. Most permanently connected, non-controlled, running all the time fans, should last some years before any sort of problem appears.
I endorse your recommendation for the Flirc case, but you are a bit too half-hearted about it for the Pi 4. It keeps my P4-4Gb below 80 C and unthrottled running cpuburn-A53 in a relatively warm (~ 28 C) office. You are not likely to find a real application that pushes it that hard.Brad Q wrote: ↑Thu Aug 15, 2019 9:02 pmYou might want to just look into a Flirc case ($20 with shipping). The top half is all aluminium and acts as a big heat sink(no fan and none needed). For anything pre Pi4 they are more than enough case to keep it cool. For the Pi4 they are right on the edge, for moderate use they are fine.
My Pi 4B is mounted vertically in open air. When I need additional cooling (for example running a computational task that I don't want to throttle) I point a separate fan running from a separate power supply toward it. A photograph is available here.Brad Q wrote: ↑Fri Aug 16, 2019 1:34 amI think that there must be QUITE a bit of variation in the Pi4 boards. Most peoples' numbers track like yours, but I have talked to several others whose boards track like mine. When I first put mine in the Flirc case it was idling at about 57C in a 75F room(after the firmware update). The case was warm enough you did not want to hang onto it very long, so there was good cpu to heat sink connection. Over the last week(first week of really running it) that has slowly dropped by about ten degrees (C) and the case is warm but not hot. That being said, even when I ran 4 core 100% sysbench it never exceeded 65C(with Flirc). Everything is bone stock, no overclocking type stuff. It is also much cheaper that the $70 wicked case. There is a third passive heat case manufacture (looks like a tiny aluminium brief case from the 80s) that is supposed to cool very well but I do not know if they make a p4 case and I have not seen a price.
Found it: Mechatronics Arts for $49 Pi3.
Any "decent" fan should run for years. I have had Unix and Linux servers with uptimes of over 2 years, that have always on fans.
Earplugs can also help. I used to have a set of over-the-ear hearing protectors for use when the computers got loud. Those can be purchased at typical hardware stores, an ironmonger or sporting goods store.