Input-Output Coincidence

Albert Hodo. Tangible UI, Fall 22

Prompt: Create and Input and Output device with the Arduino. You can use the piezo speakers or any other device.

Components Used

1. Bread Board
2. RGB LED’s
3. Active Buzzer
4. Origami Folded Paper
5. MQ2 Gas Sensor (to simulate Co2 sensor)
6. Jump Wires
7. Arduino Uno

Process

I used the Gas sensor to simulate the Co2 sensor to read the presence of gas in the room. I then mde the buzer beep when there was the presence of gas in the room. I also used the RGB as ambient light and made it a bright orange when the buzzer beeps.

Code

#include <Wire.h>
#include <Adafruit_Sensor.h>

int redpin = 11; //select the pin for the red LED 
int bluepin =10; // select the pin for the blue LED
int greenpin =9;// select the pin for the green LED 
int val;
int buzzPin =3; //Connect Buzzer on Digital Pin3
unsigned i=0;
int redVal   = 255; 
int greenVal = 1;   
int blueVal  = 1;
int lightVal=0;

void setup() {
  Serial.begin(9600);
  pinMode(redpin, OUTPUT);
  pinMode(bluepin, OUTPUT);
  pinMode(greenpin, OUTPUT);
  pinMode(buzzPin, OUTPUT);
}
void loop(){

int gasVal;
gasVal=analogRead(A2);//Read Gas value from analog 0
//gasVal = gasV*5.00/1023.00;
//int RS = ((5.00*10000)/gasVal) - 10000;
//int ratio= RS/20000;
//int alcohol= ratio*3616.1 -2.675;
i += 1;
  if (i < 255) {
    redVal   -= 1; // Red down
    greenVal += 1; // Green up
    blueVal   = 1; // Blue low
  } else if (i < 509) {
    redVal    = 1; // Red low
    greenVal -= 1; // Green down
    blueVal  += 1; // Blue up
  } else if (i < 763) {
    redVal  += 1; // Red up
    greenVal = 1; // Green low
    blueVal -= 1; // Blue down
  } else {
    i = 0;
  }
if(gasVal>122){//22
  analogWrite(redpin,   255);
  analogWrite(greenpin, 0); 
  analogWrite(bluepin,  0);
  
  digitalWrite(buzzPin, HIGH);
  delay(500);
  digitalWrite(buzzPin, LOW);
  delay(500);
}
  else{
    analogWrite(redpin,   redVal);
    analogWrite(greenpin, greenVal); 
    analogWrite(bluepin,  blueVal);

    }
Serial.print("Gas level is: ");   
Serial.println(gasVal,DEC);//Print the value to serial port
//delay(100);
}

Demo