Final Project Journal

Software

MAIN TOOL

1- CREATE (drawing the Skitch & EXTRUDE)

2- MODIFY (MOVE & COPE)

3-ASSEMBLE (JOIN & COMPONENT)

As I Learned from the pervious weeks, i start with making a component from ASSEMBLE

Then we start to plan how to fix it on the plywood sheet so we choose from CREATE -project , then we choose the positions of the nails then From EXTRUDE we cut this holes.

Then we start to fix the breadboard AS the previous

Software 

Machine

Material 

INPUTs

OUTPUTs (ACTION)

Essentials

• • Action: sound, flashlight

  • Green light (normal VOCs level)

  • Red light (high level of VOCs) and BUZZ Sound  

  • Blue light (moderate VOCs level)

  • Sensing: VOC (Volatile Organic conc) Sensor 

  • User Input: air

Software

I connect the

1.  +ve wire of RGB LED (RED = PIN 4"unhealthy",GREEN = PIN 5"healthy",BLUE = PIN 6"moderat")

2.  -ve wire of RGB  LED to PIN GND on a GND of Breadboard, (Each LED PIN attach to resistor 220 ohm)

3. +ve wire of Buzzer to PIN 7  & -ve wire of Buzzer to PIN GND on a GND of Breadboard,

4. Terminal of Button to PIN 3 &the other terminal of Button to PIN GND on a GND of Breadboard,

5. GND of Breadboard to a GND of Arduino.

6.  I connect the MQ 135 sensor, VCC connects to the 5v pin& GND is connected to a GND of Arduino & DO connect To digital PIN 2 & Analog PIN A0.

I needed Simple Code to make the Lights turn to a different color and the buzzer go on according to the readings of VOCs sensor so:

// HERE IS THE EXPLANATION OF EACH PIN 

int sensorValue;

int digitalValue;

int RED = 4;     //  unhealthy LEVEL

int GREEN = 5;   // healthy LEVEL

int BLUE = 6;  // moderate LEVEL

int BUTTON = 3;  // ON/OFF SWITCH

int BUZZER = 7;  // SOUND OF unhealthy LEVEL

void setup() {

// HERE IS DECLARING OF INPUT & OUTPUT

  Serial.begin(9600);  // sets the serial port to 9600

  pinMode(RED, OUTPUT);

  pinMode(GREEN, OUTPUT);

  pinMode(BLUE, OUTPUT);

  pinMode(BUZZER, OUTPUT);

  pinMode(BUTTON, INPUT_PULLUP);

  pinMode(2, INPUT);

}

void loop() {

  BUTTON = digitalRead(3); 

  //Serial.println(BUTTON);

  //if (digitalRead(3) == LOW) {

  sensorValue = analogRead(A0);  // read analog input pin 0

  digitalValue = digitalRead(2);

  Serial.println(sensorValue, DEC);  // prints the value read

  Serial.println(digitalValue, DEC);

  Serial.print("Analog= ");

  if (digitalRead(3) == LOW) {// when I turn the switch on // HERE IS THE LOOP START WITH CHECKING IF THE BUTTON IS WORKING OR NOT

    if (sensorValue > 0 && sensorValue < 150) {// healthy level

      digitalWrite(BUZZER, LOW);

      digitalWrite(GREEN, HIGH);

      delay(100);

      digitalWrite(GREEN, LOW);

      delay(100);

    } else if (sensorValue > 151 && sensorValue < 170) { // moderate level

      digitalWrite(BUZZER, LOW);

      digitalWrite(BLUE, HIGH);

      delay(100);

      digitalWrite(BLUE, LOW);

    } else if (sensorValue > 171 && sensorValue < 400) { // unhealthy level

      digitalWrite(BUZZER, HIGH);

      delay(100);

      digitalWrite(BUZZER, LOW);

      digitalWrite(RED, HIGH);

      delay(100);

      digitalWrite(RED, LOW);

    }

    delay(100);  //Just here to slow down the output.

  } else if (BUTTON == HIGH) {// when I turn the switch OFF EVERY THING IS OFF

    digitalWrite(BUZZER, LOW);

  }

  //}

}

Connecting the circuit with the wooden box

Closing the wooden Box with nail & nuts and letting my nephews color it

the device wasn't working even though each code piece was tested and was functional, but then instructors reviewed and we walked line by line till we found a condition was written twice (duplicated) as shown the digital read (3) is repeated 2 times, so that was confusing the components and we removed the duplicated line then everything worked

here is the wrong Code

if (digitalRead(3) == LOW) {

  sensorValue = analogRead(A0);  // read analog input pin 0

  digitalValue = digitalRead(2);

  Serial.println(sensorValue, DEC);  // prints the value read

  Serial.println(digitalValue, DEC);

  Serial.print("Analog= ");

  if (digitalRead(3) == LOW) {

    if (sensorValue > 0 && sensorValue < 150) {

      digitalWrite(BUZZER, LOW);

      digitalWrite(GREEN, HIGH);

      delay(100);

      digitalWrite(GREEN, LOW);

      delay(100);

    } else if (sensorValue > 151 && sensorValue < 170) {

      digitalWrite(BUZZER, LOW);

      digitalWrite(BLUE, HIGH);

      delay(100);

      digitalWrite(BLUE, LOW);

    } else if (sensorValue > 171 && sensorValue < 400) {

      digitalWrite(BUZZER, HIGH);

      delay(100);

      digitalWrite(BUZZER, LOW);

      digitalWrite(RED, HIGH);

      delay(100);

      digitalWrite(RED, LOW);

    }

    delay(100);  //Just here to slow down the output.

  } else if (BUTTON == HIGH) {

    digitalWrite(BUZZER, LOW);

  }

  //}

}

After Solving the Problem

//if (digitalRead(3) == LOW) {

  sensorValue = analogRead(A0);  // read analog input pin 0

  digitalValue = digitalRead(2);

  Serial.println(sensorValue, DEC);  // prints the value read

  Serial.println(digitalValue, DEC);

  Serial.print("Analog= ");

  if (digitalRead(3) == LOW) {

    if (sensorValue > 0 && sensorValue < 150) {

      digitalWrite(BUZZER, LOW);

      digitalWrite(GREEN, HIGH);

      delay(100);

      digitalWrite(GREEN, LOW);

      delay(100);

    } else if (sensorValue > 151 && sensorValue < 170) {

      digitalWrite(BUZZER, LOW);

      digitalWrite(BLUE, HIGH);

      delay(100);

      digitalWrite(BLUE, LOW);

    } else if (sensorValue > 171 && sensorValue < 400) {

      digitalWrite(BUZZER, HIGH);

      delay(100);

      digitalWrite(BUZZER, LOW);

      digitalWrite(RED, HIGH);

      delay(100);

      digitalWrite(RED, LOW);

    }

    delay(100);  //Just here to slow down the output.

  } else if (BUTTON == HIGH) {

    digitalWrite(BUZZER, LOW);

  }

  //}

}

I Got another challenge connecting RGB with resistors and Jumpers but jumpers keep Disconnecting Easily, so I decided to solder the resistors with RGB to make them all one part

• reading of the value of the VOCs Level on the Screen.

• sending sms to phone by Bluetooth.