Their benefits are such that it’s become surprisingly rare to see a traditional linear power supply with a mains-frequency transformer and rectifier circuit, so [ElectroBoy]’s dual voltage PSU ...

We can see how circuits work, and represent them with ... These could be batteries, solar panels, or a power supply connected to the mains - anything that can provide power to our circuit.

A basic DC power supply can be built with four circuits (or sections), as shown in the following diagram, where each block represents a particular circuit that performs a specific function. Image ...