Dave Jones over at EEVBlog posted his design for a simple soft power circuit. This is something I looked at a couple of years ago in my own un-expert way. I really like Dave’s design. It’s just so simple and draws basically nothing when off. It’s something I definitely want to file away in my library of circuits as I can see it coming in handy quite often.
If you are not familiar with EEVBlog you should check it out. Dave’s series of videos are fun to watch and you often learn something.