Wiring up a computer fan to a normal outlet, without using a computer PSU

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Ive got a Rack that is getting abit hot and i would like to cool using fans. Ive checked out units made by Mid Atlantic c.£300 which are really expensive, but have also come across places selling fan rack mounting panels for normal pc fans for about £10 and can hold 3 fans, and then a normal pc fan is about £6 each so i thought id give that a try first.

My question is how to power them up, as i understand a pc fan has a molex connection on it, as its meant to be used with a computer PSU, but in this application is there a way i could wire this so that it would work with a vis some sort of transformer ?

Power supply wise im in the UK.

Best Answer

Any 12V power supply of suitable amperage would work. Of course you will need to cut and splice the wires to connect them. A spare psu works great as well, often just needing a jumper wire and maybe a power resistor on the five volt rail.

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