How to change a three pin case fan to a usb plug case fan?

[goheenis]

Hi all, Im making a computer cooler table for my laptop computer and I'm having trouble changing the three pin plug that came with my led case fans to a usable usb plug can anyone help me out? ill try to add a picture of the unit with fans installed.

Please if you can help Thanks...

 

[Conumdrum]

I think USB is only 5vdc, so you can't put a 12V fan on USB. Might have problems with curent ratings if you can make it work.

Google the pinouts of a USB connector and see what the specs are.

Yep, only 5 volts and max current only 100mA. Nope, no workie.

 

[one-shot]

Which would equal 500mW which is half a watt. It won't work with USB 2.0 or less.