An integrated circuit, or IC for short, is a semiconductor wafer that contains thousands or millions of tiny resistors, transistors, and capacitors that are used to perform certain functions. There are millions of different types of IC and one example is the Atmel ATmega128 microcontroller used in the Arduino. Virtually all electronics have some integrated circuits in them.
Now that we have seen the more popular electronic components that will make up the projects in this book, let's see what electricity is.
