I have a 12 to 14V DC power source I need to reduce to 3V DC @ 675mA but would like to have the head room for up to 1.5 amps. So I planned on using a basic zener diode voltage regulator, with a 10W 16ohm resistor to provide the voltage drop with a 3v zener in parallel with my load. The board I'm attempting to create needs to is 1.75" by 2", and the big limitation is between this board and the next I have just .25". So the resistor I was looking at getting is to tall. I thought of doing some sort of resistor network to reduce the size, but then it takes up valuable board space. I also was hoping to fit an led on the board, so space is tight. Any ideas on how to regulate this, or incorperate a resistor that is some what small that can handle the power?