This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Variable power supply using switched multiple tap transformer. This is the inside of wall wart style variable power supply The large component with yellow parts is transformer with several 'tappings' By connecting to different tappings different voltages can be produced Full wave rectification is provided by four silicon diodes the