Lab 10

Servo Motors and Ultrasound Sensor 
References:

- Arduino Ultrasonic Range Detection Sensor.pdf           

OBJECTIVE

We first address the operation of a servo motor  as a closed-loop feedback system that uses i) a PWM signal to establish a desired target rotation of its rotor shaft, and ii) a sensor feedback signal system (an optical encoder, or a potentiometer) that monitors the actual position and reacts accordingly until the desired rotation is achieved. In the second part we address the working principle of ultrasound sensor to estimate the location of distant objects.

CONTENTS

1. Introduction

2.  Components of a Servo Motor

  2.1   The servo system

  2.2   The feedback signal

  2.3   The control signal

            Continuous rotation servo

            Targeted angle  rotation servo

  2.4   Simple test code programs

3. Ultrasonic distance sensor

                 What is Ultrasound?

Strategy for the ultrasonic range finder to measure distance

4. Experiment procedure

  4.1   Servo motor ( SG90)  

   4.1.A  Servo motor response to preprogrammed angle rotations

  4.1.B. Using the serial window to control the position of the servo

4.2   Ultrasound module

       4.2.A Measuring distance

          4.2.B   Using the serial window to control the position of the servo

REFERENCES

           https://www.youtube.com/watch?v=viJIbuqvhtI

          https://www.youtube.com/watch?v=Gzo9m0tMD0A

            https://www.youtube.com/watch?v=LXURLvga8bQ

            https://www.youtube.com/watch?v=kUHmYKWwuWs   Continuous and fixed rotation servos

https://www.youtube.com/watch?v=6F1B_N6LuKw

https://lastminuteengineers.com/arduino-sr04-ultrasonic-sensor-tutorial/

https://www.youtube.com/watch?v=Ea4CGAw6b_M

https://www.circuitbasics.com/how-to-set-up-an-ultrasonic-range-finder-on-an-arduino/