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Connecting a fan to the gpio connectors

Posted: Sun Nov 25, 2012 10:25 pm
by JPatrickDev
Hi :)
Im looking to get a small fan to cool my raspi, and im wondering what connector I need to be able to plug it into the GPIO ports on the pi? http://www.amazon.co.uk/Akasa-AK-4020MS ... 112&sr=1-1 is the sort of fan im looking for. Thank you for any help :)

Re: Connecting a fan to the gpio connectors

Posted: Sun Nov 25, 2012 10:40 pm
by joan
That fan is rated at 12V. The gpio pins can supply a few 100 milliamps at 5V. The fan might not even turn with just 5V.

Re: Connecting a fan to the gpio connectors

Posted: Mon Nov 26, 2012 12:52 pm
by TonyD
Have you seen HotPi at Kickstarter

http://www.kickstarter.com/projects/582604098/hotpi

that has a fan output

Re: Connecting a fan to the gpio connectors

Posted: Mon Nov 26, 2012 1:02 pm
by redhawk
That fan is rated at 12V. The gpio pins can supply a few 100 milliamps at 5V. The fan might not even turn with just 5V.
If you're using the 5v output pin then you have as much power as the USB ports.
I'm also using a micro fan rated at 12v this works fine using 5v and although it spins a little slower there is sufficient air flow for cooling.

Richard S.

Re: Connecting a fan to the gpio connectors

Posted: Fri Nov 30, 2012 11:35 am
by pyman
I've backed the project - have to wait a while though. Real time clock will be really useful when no network connection is available to set/get date/time in an application I am working on.

http://www.kickstarter.com/projects/582604098/hotpi

Re: Connecting a fan to the gpio connectors

Posted: Fri Nov 30, 2012 4:08 pm
by notarat
I use a USB-to-3Pin adapter, like the one shown below
Image

That particular one is listed on FrozenCPU.

I plugged the cable into one of the USB 3.0 Ports on my MondoHub and it works fine to power a 50mm fan.