CHAPTER 3An Alternative Wayto Power an LED:“Green” Pocket LED Flashlight

IF YOU COMPLETED THE PROJECT IN THE PREVIOUS chapter, you’ve illuminated an LED and created a flashlight, which is a good start to your journey to understanding the many things that you can do with LEDs. In this chapter’s experimental project, you’ll utilize the basics of the LED flashlight from project 1 and add another element to it.

One of the benefits of using LEDs is their low current consumption relative to that of an incandescent light bulb. Although some bulbs provide a better light output than ultra-bright LEDs, the dual LED flashlight that you built in Chapter 2 provides sufficient light output for use as a flashlight. The flashlight that you built has a current ...

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