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Ladyada's Learn Arduino

Ladyada's Learn Arduino - Lesson #0
If you're here, it's because you want to learn how to build and make stuff with electronics! And, you're in luck: there's never been a better time.
Ladyada's Learn Arduino - Lesson #1
Ah yes, it is finally time to make your Arduino do something! We're going to start with the classic hello world! of electronics, a blinking light. OK it doesn't sound too exciting, heck you can just flip your desk lamp on and off without needing a microcontroller.. but I promise you, you'll learn a lot!
Ladyada's Learn Arduino - Lesson #2
OK you've gotten your Arduino set up and also figured out how to use the software to send sketches to the board. Powerful stuff! But...just running example sketches is a little boring. What we really want to do is use our own creativity and skill to write new sketches! That's what we'll be doing in this lesson. To start we will venture deep into the Blink sketch, looking at each line and trying to understand what its doing. Then we will start hacking the sketch, and maybe even meet an internationally-famous DJ and design custom hardware for him!