September 2015
Beginner
492 pages
13h 14m
English
Content preview from Robot Building for Beginners, Third Edition
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CHAPTER 7
Nine-Volt Batteries
Sandwich, the line-following robot, uses a 9 V battery for power. In fact, most of my robots use 9 V batteries because the batteries are so small and lightweight. In this chapter, you’re going to learn how to test a 9 V battery (see Figure 7-1) and find out about the differences in battery brands and chemistries.
Figure 7-1. Alkaline 9 V battery
How many volts in a nine-volt battery? Yes, it’s sort of a trick question. Although the answer is somewhere around nine volts, the actual voltage varies based on what the ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.