how do i make a wire longer?
From what I'm told, it's not about length, but rather about girth.
"If you cut a piece of wire too short, you can always splice on another piece. If you cut it too long, you're stuck with it."
place the end in an electroplating bath. Prior to doing so, calculate the effective deposition rate, then use that information and a micro stepper to ever-so-slowly draw the wire out of the bath as it gets electroplated. But seriously...buy some wire dude.
Solder, weld or tie another piece to it. If its going to carry electricity then you should insulate the joint properly.
More details please.
Feed it through a rolling mill with the appropriate gauge rollers.
Stretch it. Pull it through a die.