if i have a 24v dc power supply such as linked below, what is the best way to "add" a 12v capability? As in i'd like to throw a switch in the output lines to select either 24 or 12 volts, by having the output when switched go through a voltage regulator or divider. Or can I hack into the power supply and put a second resistor in somewhere that will change the output? Keep in mind i want to do this for up to the 6amp capability. It is my understanding that a plain old resistor based voltage divider will vary the ouput voltage as my load varies.
http://www.mpja.com/24V-65A-150W-Power-Supply/productinfo/16032+PS/
http://www.mpja.com/24V-65A-150W-Power-Supply/productinfo/16032+PS/