I like to present the educational video about DC power sources and the ripple factor. Here I go into more details what power supply to use and the issue of ripple for your application. While it is easy to see that just rectifying mains AC should be the smartest way, it is in fact not. Switched mode power supplies are everywhere for a reason. I demonstrate why and will give you also guidance what to purchase for your projects. With small simply steps a cheap and powerful DC power supply can be configured. This video is only available to Basic and Full members. You find the video under Research under this link in electronic design. /research/courses/electronics-design/