We started experimenting with DC motors in Chapter 4. A lot of the principles that you will learn when using DC motors are applicable to many things that you might want to control with an Arduino or Raspberry Pi.
Figure 7-1 shows a selection of DC motors. As you can see, these devices come in all sorts of shapes and sizes.
Motors are also the driving force behind lots of other useful output devices like pumps and linear actuators, both of which you will meet later in this chapter.
As you discovered in “Experiment: Controlling a Motor”, DC motors need too much current to ...