how to make toroidal power transformer?

To make a toroidal power transformer, start by selecting the appropriate core material, typically ferrite or silicon steel, and cut it into a toroidal shape. Wind the primary and secondary coils around the core, ensuring the wire gauge matches the current requirements. Insulate the windings to prevent short circuits, and connect the coils to the input and output terminals. Finally, test the transformer for voltage and current specifications to ensure proper functionality.