A product that is often built ... So what is there on that board that’s worth lifting? Just a selection of ATX power supply magnetics and cores. One thing that’s in abundance on an ATX PSU ...

A computer power supply converts AC into multiple DC voltages. For example, 12 volts is commonly used for drives, while 3.3v and 5v are used by the chips and other motherboard components.

so [ElectroBoy]’s dual voltage PSU board for audio amplifiers is worth a second look. This type of linear power supply has an extremely simple circuit consisting of a transformer, bridge ...