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Mastering Arduino by Jon Hoffman

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Introduction

The types of servo motors that we will use with the Arduino are pretty small, but most have fairly high torque and are very energy efficient. This allows us to use these motors for industrial-grade applications such as robotic arms, conveyor belts, autofocus lenses in cameras and even solar-tracking systems for solar panels.

A servo motor is made up of a DC motor, which does the actual work; a potentiometer, which controls the amount of power going to the motor; control circuitry, which controls the movement of the motor and gears. The following photograph shows a servo motor connected to a robotic claw:

A servo motor contains ...

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