Power & Source of Big Ideas

Installing a fan NEO3

Moderators: chensy, FATechsupport

Hello Everyone,

as you might have also noticed, the NEO3 is running very hot inside the white plastic box. I have already got the top of the enclosure off, which helped a bit, but it is still quite hot, so I need to think of some kind of cooling. I would like to install a fan.

I am a newbie to SBCs. I had examined the board and have found two pins tagged as 5V and GND for FAN.

IMG_1995.jpg (145.83 KiB) Viewed 112 times

Is this the place to connect the fan to? Will any type of 5V fan with a 5V and GND cables work or do I need to look for a type specifically? Is it somehow possible to configure the SBC to control the fan and adjust the RPM according to the current temperature of the CPU? (One fan I can buy has some kind of PWM control, but it has 4 pins instead of 2.)

Thank you!
According to the schematic, there are MOSFET drivers on this to switch the fan ON and OFF via GPIO2 which is also marked as PWM2 at the same time.

Not sure if the kernel is already driving this as ON and OFF or PWM but it is possible to control the speed with this for a basic 5V powered fan if you have the skills to fiddle with the kernel etc.


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