Thanks audioguru. I would like the inverter to produce 300 watts, so I need 25 amps. Do you know the part number for a "low dropout" regulator rated for 25 amps and how to hook it up? I am thinking it should be simple voltage in, voltage out, ground, but i have seen some circuits that use capacitors, etc. Also, I don't think the circuit I am building will handle 300 watts, but this is a school project and all i need to show is 120 volts at 60Hz. I have seen a better, more complicated design that will handle 500 watts that i would like to build in the future, but I am a newbie, and this project is just something to get my feet wet, so to speak.