Most of the electronics require DC power supplies to operate different devices and accessories. The most popular and common is a 12v 1A SMPS that can be derived from the household AC supply with rectification, filtering, transformation and stabilization. If you want stable output and don’t want to make a rectifier, then go for SMPS. It has a strong steel- or iron-laminated transformer that gives a safety barrier for the low-voltage output from the AC input & lower down the input to a much lower voltage.
Within a certain price range free samples are available