Electronics Voltage supplied to PC LED Connection

I'd assume the power provided is 12V right and that to get the correct voltage for your LEDs you need to use a resistor? Also, does anyone know where I could buy the wires and connector for Power Sw/Power LED/HDD LED/ResetSw?

 

Nope, it's a little more complicated than that. Suffice to say, if you're using a standard LED (i.e. not some Luxeon Star style affair!) you don't need to worry about voltage or a current limiting resistor, just orientate the polarity correctly and you're good to go.

 

So any old LED will do, will it alter the voltage sent or what?

 

Yeah, that's exactly what happens - coltage and current is regulated by teh motherboard, so manufacturers don't have to use any "standard" LED on their cases or worry about current limiting for different colours etc.