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I have 2 or 3 spare 90mm fans lying around. I took one of them (12V) and clipped the endings of it and connected it to a spare 13V adapter. It works well as a neat little desktop fan:





Just thought I'd share it with you all. :P

That's fun. I'll bet it moves some decent air.

In the robotics shop (I'm on a robotics team, see signature) I take one of the robot's cooling fans and hook it up to a battery to blow soldering fumes away. The big 120mm fans we have work great for that.

I grab blue_tetris and mention anything related to his sexual escapades.
You need ear plugs and the air is hot, but it works out okay.

Neat. Are there 5v case fans? 'Cause you could splice it straight into a USB cable if you had that.

I'm not sure if they are 5V case fans... I know the fan in the Sega Dreamcast is a 5V fan and I killed it by having it connected to a 9V battery for too long.

LittleViking wrote:Neat. Are there 5v case fans? 'Cause you could splice it straight into a USB cable if you had that.

Generally case fans are 12V, because the only open connectors on computer PSUs are molex, which are 12v (or they run off the motherboard, but that is off the 12v part of the giant 24 pin power connector going to the motherboard)

smartalco wrote:

LittleViking wrote:Neat. Are there 5v case fans? 'Cause you could splice it straight into a USB cable if you had that.

Generally case fans are 12V, because the only open connectors on computer PSUs are molex, which are 12v (or they run off the motherboard, but that is off the 12v part of the giant 24 pin power connector going to the motherboard)

No, the molex connectors offer +5v too, it's the red connector on a molex accessory connector (yellow is +12v). Disc drives and the like use the 5v to drive electronics and the head servo. the floppy power connector also offers +5 (once again, red) as does the less common 6-pin connector. those square ATX connectors, however, only offer +12v.
That said, most fans are going to be +12v.

*facepalms* while, at one point I knew that...

On lifehacker recently there was a link to a howto to make a homemage beer cooler involving a CPU cooler, perhaps you should try that next! ;D