Motion is one of the primary differentiators between a robot and a computer. More robots get their motion from DC (Direct Current) motors than from any other mechanism (see Figure 17-1).
Figure 17.1. Ordinary DC motor
This chapter details the different varieties of DC motors and their characteristics. If you don't find this subject interesting, you can skim this chapter and move on to the next. Motors won't be selected and attached to the line-following robot circuit until the next chapter.
In an electric motor, electricity is converted to motion by magnetism.
Most people have played with a pair of magnets. Placing ...