Page 358 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

Appendix: BreadBoard Power and Arduino Primer 335

FIGURE A-7 Arduino with external LED plugged in

CAUTION Do not plug things into (or unplug things from) an Arduino
while it is powered. This is bad and could give you some very weird errors,
and, worst case, mess up your microcontroller chip (the brain on the
Arduino). These are relatively easy to replace, but if you follow this advice,
you should never have to do so.

Now that you know how to affect the outside world with code that lives on your
Arduino, you should be ready to tackle the projects in Chapter 6 and beyond. This
book does not go into depth on how to write code. Check Getting Started with
Arduino by Massimo Banzi for an Arduino-specific introduction to programming.