Wall-wart power supplies are everywhere in modern life. These Chanzon 12V 2A UL-listed 24-watt AC/DC switching power ... I like the ability of many to switch automatically between 120 and 240 VAC ...

As the ATX PSU standard moved from the old 1.x revisions into the current 2.x revision range, the -5V rail was removed, and the -12V rail made optional. The ATX power connector with the mainboard ...