How to run cooling fans on ac power?

[Sonu44589]

How to run 3 120mm fans without a Desktop PSU or motherboard?
I mean on AC power!

 

[maxwellmelon]

they run off 12volts or 5volts dc(should say on the label of the fan and most are 12 volts) so you have to use a 120volt ac to 12 volt dc device called a power adapter. but really what are you planning on using them fans for???

 

[Sonu44589]

for this :http://www.tomshardware.com/answers/id-3077290/building-cooling-table-lot-questions.html

A cooling table, with proper exhaust fans, inscribed space for wacom intuos, and many more features including it being a complete dock

just got the idea when I was thinking how to cool my laptop during work

 

[Sonu44589]

I already figured that out a few minutes later but thanks anyway

 

[Sonu44589]

BTW are 1500rpm fans enough or do I need 2000 for proper air If I am using 3 of them for air inlets and 2 for exhaust?