Lights, especially LEDs, are used all the time in electronics. Sometimes, they’re just simple indicators that show whether a device is on or not, but they can also be part of more complicated devices, like computer displays. In fact, some displays are actually made up of thousands of tiny LEDs.

In this chapter, you’ll learn how two of the most common basic components in electronics work: the resistor and the LED. I’ll show you how to kill an LED, but don’t worry: you’ll learn how to use resistors to keep LEDs alive, too. In this chapter’s projects, you’re also going to start using a new tool, called a breadboard, to connect ...

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