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128 Making Things Move

FIGURE 6-4 Rotary motor family tree

We’ll explore each motor’s personality by demystifying data sheets for each type.

DC Motors
As you learned in Chapter 5, DC is the kind of constant flow of electricity you get
from batteries. Your cell phone also works on DC power, so your charging cable
includes a bulky box that converts the AC power from a wall outlet into DC form the
phone can use.

Figure 6-5 shows all the members of the DC branch of the motor family tree: DC
motor, DC gearhead, hobby servo, and stepper motor.