Tutorial Beginningembedded 1-Powersupply Bb-Powersupply-3
Spark Fun has a new series of tutorials, here’s the first, beginning embedded electronics –

This is a series of lectures written for those with mild electronics background (aka Sophomore in Electrical and Computer Engineering) to learn about the wild world of Embedded Electronics. I assume only that you know what electricity is and that you’ve touched an electrical component. Everything else is spelled out as much as possible. There is quite a lot here so take your time! It is also my intention to get book-hardened EE’s students to put down the calculator and to plug in an LED. Remember, if it smokes, at least you learned what not to do next time!

Spark Fun Electronics – Link.