jehan60188
Posts: 10
Joined: Tue Jul 17, 2012 8:49 pm

adding a cooling fan?

Fri Jul 27, 2012 12:05 am

So, I've been looking at different Raspberry pi stuff, and am under the impression that it runs kind of hot.
I've got my hands on a small fan, (2.5 cm X 2.5 cm) that draws 230 milliamps and runs on 5v.
Is there a way to power the fan through the R-pi? Should I use the gpio pins? should I use another power supply?
thanks!

khh
Posts: 49
Joined: Thu Jul 26, 2012 12:16 am

Re: adding a cooling fan?

Fri Jul 27, 2012 7:32 am

If you don't have anything else that uses power and have a beefy power supply of 1000 mA or more, then there should be no problem connecting a fan like that to the GPIO 5 V pins. If you have anything else that draws power, it might still work, but then it's less certain.

jdbennet
Posts: 96
Joined: Sun Jul 22, 2012 2:25 pm

Re: adding a cooling fan?

Fri Jul 27, 2012 5:48 pm

Its supposed to run hot. Normal operating temp is 40-60 degress, i believe.

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computerpie
Posts: 57
Joined: Wed Jun 20, 2012 10:55 pm
Location: USA

Re: adding a cooling fan?

Fri Jul 27, 2012 6:47 pm

Just an FYI.
Once I shutdown I leave my fan running for a few more minutes (red led still lit on Raspi) before I power down completely (I have an on/off switch). That way the fan cools the board down more evenly during that time (about 5 to 10 more minutes).

You might look around more I found some 100 mA processor fans in my old parts box.

Good Luck.
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tvinzant
Posts: 14
Joined: Fri Jul 27, 2012 3:10 am
Location: USA

Re: adding a cooling fan?

Fri Jul 27, 2012 7:32 pm

jehan60188 wrote:So, I've been looking at different Raspberry pi stuff, and am under the impression that it runs kind of hot.
I've got my hands on a small fan, (2.5 cm X 2.5 cm) that draws 230 milliamps and runs on 5v.
Is there a way to power the fan through the R-pi? Should I use the gpio pins? should I use another power supply?
thanks!
May I recommend an alternative?
http://www.raspberrypi.org/phpBB3/viewt ... 98#p134098

jehan60188
Posts: 10
Joined: Tue Jul 17, 2012 8:49 pm

Re: adding a cooling fan?

Sun Jul 29, 2012 11:17 pm

thanks for all the replies, my graphics card failed recently, so I might take the heat sink off that and try something like this: http://hackaday.com/2012/06/26/adding-h ... pberry-pi/
but I'm looking for active heat dissipation options, too. I'll probably look at alternate power supplies, so I can keep the gpio pins open for other stuff.
thanks all!

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