i got a couple of questions. i am making a fan bus and i need some help calculating what resistors i need. my first one is
what size resistor will i need to step 12 volts down to 7 for my fan, my second question is what size resistor will i need to step 12 volts down to 2 for my led? My crappy diagram of what i am trying to build is bellow. if anyone knows a better method for what i am buildin let me know though i allready have my switch and leds so they will have to work.





also, will these resistors get warm enough i will need a small fan blowing on them?
at www.mouser.com which connector is it that will plug directly in to my bigger powersupply plug?
what is the best way to connect my fans to the setup above what i can get at that site.

Thanks for all the help!!!