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Controlling Servos
Various projects in Chapter 8 used DC motors, which are ideal for rotating devices such as wheels for robots. However, for more precise motor control options, you can use a servo, short for servomechanism. Servos contain electric motors that you can rotate to a specific angular position using PWM signals.
Servos come in handy for a variety of applications. For example, you might use a servo to steer a remote-controlled car by connecting it to a horn, a small arm or bar that the servo rotates. You might also connect a physical pointer to a servo so it can indicate information such as temperature on a scale, or use a servo ...
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