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 ...
Get Robot Building for Beginners, Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
