lower voltage help

ok so the reason i need 3.3v is because im going to make another homemade ck3 i made one before using a pc power supply but its a little big so i wanted to make a smaller and lighter one using a spare xbox 360 power supply. but since it does not have a 3.3v line i need to bring the voltage down so what diode or whatever do i need to use to lower voltage? thanks in advance

 

anybody?

 

Dvd drive power has 3,3v.
I made it a few years a go from 5v usb cant remember resistor

 

if you remember what resistor you used pm me

 

I think u can find it in the first slim dvd hack posts.
I used it that time.

 

why not just buy a ck3 there cheap enough and for the cost of buying parts to bild one you may aswell just buy the proper item :|

 

i already made one before and i have everthing to make another just need to lower 5v to 3.3v