Since some of you have expressed on other posts that you are a bit lost on the basics of electronics, and that you would like to see some schemes, here you have a link to "The Electronics Club", a great reference page for electronics newbies. I have directly linked you to a list of basic components, their description, how to choose, how you should connect them, etc :http://www.kpsec.freeuk.com/compon.htm
I hope this helps
P.S. By the way, just to reassure you, I have studied electronics before, and I don't think that any of the questions that people post here are naive or silly. I learn tons of new things every day through this forum thanks to them, so please keep posting, asking and sharing!