Mood Cue: a Scientific Temperature- Mood- Correlation

There are studies thats show that mood affects the body temperature of a person. This projects uses a temperature sensor to sense the body temperatures of a person and guess the corresponding mood.

Step 1: BoM

* Arduino

* Servo motor

* Temperature sensor - TMP36

* Popsicle

* Box

Tools

* Blade

* Glue gun and Glue sticks

Step 2: Making the Pointer

* Take a popsicle stick and begin shaving down the sides with the blade of an x--acto knife until you get an arrow-like shape. Roughen it up with an x-acto blade to increase surface area for glue bonding.

* Glue this pointer to the servo horn with hot glue.

Step 3: Wiring the Servo

* Connect the red wire of the servo motor to 5V.

* Connect the black wire of the servo motor to GND.

* Connect the white wire of the servo motor to pin 9 on the Arduino.

Step 4: Wiring the Temperature Sensor

* Connect the top pin of the sensor to 3.3V.

* Connect the bottom pin of the sensor to ground.

* Connect the middle pin of the sensor to pin A0 on the Arduino.

Step 5: Enclosing in a Box

Take the lid of a box and tape the Arduino on it securely. Then snake the wires through a notch. Add some paper and draw the different moods from sad to neutral to angry.

Glue the servo to the base of the box with the pointer pointing at neutral.

Step 6: Coding and Uploading

Upload the following code to the Arduino.

#include <Servo.h>

const int servo = 9;

const int tempPin = 0;

//raw reading variable
int tempVal;

//voltage variable
float volts;

//final temperature variables
float tempC;
Servo servo1;

void setup() {
  // put your setup code here, to run once:
  servo1.attach(servo);
}

void loop()
{
 //read the temp sensor and store it in tempVal
 tempVal = analogRead(tempPin);

 //converting that reading to voltage by multiplying the reading by 3.3V (voltage of       //the 101 board)
 volts = tempVal * 3.3;
 volts /= 1023.0;

 //calculate temperature˜ celsius from voltage
 //equation found on the sensor spec.
 tempC = (volts - 0.5) * 100 ;

 if (tempC <28)
  servo1.write (80);
 else if (tempC <30 && tempC > 28)
  servo1.write (100);
 else if(tempC<36 && tempC>31)
  servo1.write(120);
  
 
 //wait a bit before taking another reading
 delay(1000);
}