Data Sheet

37
Lesson 12 Servo Motor
Overview
In this lesson, you will master how to control a servo motor with the UNO R3 or MEGA 2560
board.
Components Required
Name Qty Name Qty
UNO R3 or MEGA 2560 1 DuPont Wire 3
Servo (SG90) 1
Component Introduction
Servo motor is a kind of geared motor that can rotate with a certain angle
according to the input pulse's frequency an duty cycle. The input pulse frequency
and duty cycle should be in a certain range for proper operation. A servo motor
can usually only turn 90° in either direction for a total of 180° movement. The
PWM signal can be sent to servo to move the shaft to the desired position.
Wiring Diagram
Result
After downloading the example, the servo motor turn left at 15˚ every second, then come
back to initial position at the same speed. In next loop, it will turn left at a higher speed and
then come back.