This is a follow up post to the previous post on how to convert a computer ATX power supply to a shop DC supply. This article describes how to get more voltage combinations and goes into more detail on how to work with the unit.
When you convert a computer ATX power supply into a DC bench supply it can include up to 5 voltage outputs plus a ground. An ATX PSU (power supply unit) will always have four voltage rails — one each for +3.3 volts, +5 volts, +12 volts and -12 volts and sometimes there will be a fifth rail for -5 volts. (more…)