Servo motor

Activity 4

Purpose

https://www.instructables.com/id/4-Simple-Servo-Project-with-Arduino/

Materials

For each participant:

2 potentiometers
1 Arduino Uno
1 breadboard
2 servo motors
14 wires
Diversity Profile Worksheet

In general:

1 Computer source
1 USB Arduino cord

Vocabulary

Servo motor
Circuit
Breadboard
Arduino
Resistors

Step 1: Identity Activity - LemonHeads & Whoppers: How diverse is your everyday life?

Materials: fix based on number of questions

Clear Plastic cups (1 per person)

10 lemonheads

10 whoppers

Objective

To visually see the types of people you encounter in your daily life and begin thinking about your level of interaction with people of different races or ethnicities

Instructions

1. Review following definitions on different identities a person has with participants in order to better understand themselves and the life experiences of others

Race is a social construction that has played a large part in how our society has evolved, and it shapes the way we see others and how we experience our lives. Race is used to refer to a person’s skin color, phenotype, or area of origin.
Ethnicity is the learned aspects of a person such as language or culture that they participate in
Community a group of people who care about one another and share common interests & characteristics

2. Each person will have a clear container and lemonheads and whoppers. After each question asked by the facilitator, the participants will answer the questions by placing either a lemonhead or whopper into their container. The lemonheads will represent members of the racial or ethnic community that the participants belong to and whoppers will represent members of an racial or ethnic group outside of the participant's community. If you are an international student, lemonheads will represent members of your native country and whoppers will represent members of the United States.

Preliminary questions before beginning the activity

Do you interact with people of different races/cultures?

Do you consider yourself an effective interracial/intercultural communicator? If so, why or why not?

3. Questions the facilitator will ask for the activity:

• Who was the last guest invited to your house for dinner?

• Who was the last person you went out with socially?

• Who is your family doctor?

• Who is your family dentist?

• Who makes up the majority of students in the classes you take?

• Who is your closest friend?

• Who is your spiritual leader?

• Who makes up the majority of people at your favorite club/local hangout spot?

• Who is your favorite actor/actress?

• Who is your favorite singer/group?

Discussion:

What patterns do you see in your community?
What are differences and similarities that you noticed with that of your peers?
How did this activity make you feel?
Did you ever stop to think of how often you communicate with people outside of your group?
If your community tends be made up of people from similar racial, cultural, or religious backgrounds, what are some ways you can learn about the cultures and experiences of others?
Why is it important to work with and live with a variety of people that are different from you?

Step 2: Background On servo motor

What is a servo motor?

"A rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration". Basically, a servo motor is used in a closed-loop system to control position of the output.

How does it work?

Inside the servo motor is a "self-contained electrical device", that can rotate parts of a machine with "high efficiency and great precision". A servo motor is unique in that is couples a regular motor with a sensor for positional feedback. The servo motor incorporates positional feedback to control both linear and rotational speed and position. Servo motors are classified based on their application.

What is it used for?

Servo motors are used in many applications including automated manufacturing, robotics, and antenna positioning systems.

Step 3: Walk through the diagram

Here is the schematic for this activity!

Each servo motor has two wires coming off of it (red and black). They can be connected to the breadboard as show by connecting a simple wire from the end of the black or red wire of the servo motor, to the breadboard.

Step 4: Create the circuit

#1

Place the two potentiometers onto the breadboard with one set of prongs in the power rail and the other set in the terminal strips

#2

Use 2 wires to connect the potentiometers directly to the Arduino pins, as seen on the schematic (the yellow lines that are shown on the breadboard)

#3

Use 2 wires to connect the correct holes in the power rails to the Arduino pins (shown as short red and black lines on schematic)

#4

Use four wires to connect the potentiometers to what is happening in the power rails ( the remianing red and black lines on the schematic)

#5

Place two servo motors next to the breadboard

#6

Grab the last 4 wires. Attach one end of the wire int the little box at the end of the red and black wires coming out of the servo motor. Do this so each red or black wire has a simple wire attached to the end of it (4 in total)

#7

Connect the other ends of the simple wires to the correct holes in the power rail. Make sure the red and black are not mixed up and placed in the wrong spot.

Step 5: test the circuit

Similar to previous lessons, copy this code into the Arduino IDE, then compile and run. The servo motors will change when potentiometer is changed.

Step 6: Reflection

Discussion

What skills did you learn today?
How did it feel learning and working with other participants on the servo motor?
How would you explain what a servo motor is to your family?
If you can design a project with a servo motor, what would it be?

Appendix

This activity was taken from the project linked below:

4 Simple Servo Project With Arduino4 Simple Servo Project With Arduino: What you need 1. Arduino or Arduino Clone2. 9 gram Servo3. about 12-20 Male to Male wires4. 2 pot (potentiometers)5. the servo.h and VarSpeedServo.h libraries.6. if you want to you can make a servo shield to make it a bit neater.

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