How to power a case fan by AA batteries

D

David689

Gold Level Poster
Hi,

I am looking into jerry rigging a system for creating heat in the event of a power cut. You tube has these various methods and one involves a free standing 120mm computer case fan. I am looking for advice on how I might power such a fan with AA batteries. I have a device for urgent phone charging, that uses an AA battery and has a USB socket. So could I, without soldering (I have no such skill) power a 120mm computer case fan via a USB socket? I suspect I would need some kind of adapter? I realise this is not a mainstream situation so a simple off the peg device may not exist.

Thank you for indulging me by reading this.
 
SpyderTracks

SpyderTracks

We love you Ukraine
Fan is purely positive and negative, the only others are to do with voltage variation but that has no relation to on/off. So you simply need +- at 5amp (which usb supplies)
David689 said:
Hi,

I am looking into jerry rigging a system for creating heat in the event of a power cut. You tube has these various methods and one involves a free standing 120mm computer case fan. I am looking for advice on how I might power such a fan with AA batteries. I have a device for urgent phone charging, that uses an AA battery and has a USB socket. So could I, without soldering (I have no such skill) power a 120mm computer case fan via a USB socket? I suspect I would need some kind of adapter? I realise this is not a mainstream situation so a simple off the peg device may not exist.

Thank you for indulging me by reading this.
Click to expand...
 
D

David689

Gold Level Poster
SpyderTracks said:
Fan is purely positive and negative, the only others are to do with voltage variation but that has no relation to on/off. So you simply need +- at 5amp (which usb supplies)
Click to expand...
So something like this would work?

www.ebay.co.uk

USB to Molex 4 Pin PC Computer Cooling Fan 1 Feet Connector Cable Adapter Cor_ZK | eBay

Find many great new & used options and get the best deals for USB to Molex 4 Pin PC Computer Cooling Fan 1 Feet Connector Cable Adapter Cor_ZK at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk

Or this?

 
SpyderTracks

SpyderTracks

We love you Ukraine
David689 said:
So something like this would work?

www.ebay.co.uk

USB to Molex 4 Pin PC Computer Cooling Fan 1 Feet Connector Cable Adapter Cor_ZK | eBay

Find many great new & used options and get the best deals for USB to Molex 4 Pin PC Computer Cooling Fan 1 Feet Connector Cable Adapter Cor_ZK at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk

Or this?

Click to expand...
Depends what kind of a fan it is

If it's a very basic no speed variation fan, then it may well be powered by molex which is the older power connector on a PSU

Otherwise it will either be a 3 pin or 4 pin fan with a far smaller connector that goes into the motherboard. These you'd have to be sure it has the right size connector.

But there are loads of different styles of fans, so you'd need to work out what you're using
 
D

David689

Gold Level Poster
SpyderTracks said:
Depends what kind of a fan it is

If it's a very basic no speed variation fan, then it may well be powered by molex which is the older power connector on a PSU

Otherwise it will either be a 3 pin or 4 pin fan with a far smaller connector that goes into the motherboard. These you'd have to be sure it has the right size connector.

But there are loads of different styles of fans, so you'd need to work out what you're using
Click to expand...
So would the above two items work if the fan sys it has a four pin molec eg https://www.cclonline.com/blackfan1...QXWTuFjVmfQK5gBKc_nI1fE-zkQ0xghRoCKbIQAvD_BwE
?
Thank you
 
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