Free resources to learn computer (electrical?) engineering?
First, I just returned from DEFCON 18 and I am completely inspired to learn more about hardware.  For example, how do I add LEDs to the badge? (http://www.grandideastudio.com/portfolio/defcon-18-badge/) How do I learn how to read the schematic and understand what I can do with it?

I checked out some computer engineering books on Amazon, but they are all really expensive.  I also realize they may not even be what I want.  What are some free resources to learn how to modify hardware?

Also, as a side note, I am fairly well versed in software.  I have also built computers and played around a bit with hardware at a higher level, but I want to dive into a deeper understanding.

Thanks!
Free resources to learn computer (electrical?) engineering?
===

First, I just returned from DEFCON 18 and I am completely inspired to learn more about hardware.  For example, how do I add LEDs to the badge? (http://www.grandideastudio.com/portfolio/defcon-18-badge/) How do I learn how to read the schematic and understand what I can do with it?

I checked out some computer engineering books on Amazon, but they are all really expensive.  I also realize they may not even be what I want.  What are some free resources to learn how to modify hardware?

Also, as a side note, I am fairly well versed in software.  I have also built computers and played around a bit with hardware at a higher level, but I want to dive into a deeper understanding.

Thanks!