Just on the AC voltage question;
"US mains voltage is regularly stated to be 110V, 115V, 117V and 120V. Various changes over the years have occurred, and the nominal voltage is supposed to be 120V. Don't be at all surprised if you measure any or all of the voltages quoted ... at the same wall outlet but at different times of the day! This is completely normal."
"US mains voltage is regularly stated to be 110V, 115V, 117V and 120V. Various changes over the years have occurred, and the nominal voltage is supposed to be 120V. Don't be at all surprised if you measure any or all of the voltages quoted ... at the same wall outlet but at different times of the day! This is completely normal."