Introduction to Physical Computing-Term I

CONCEPT : The basic concept of the project was to use the servo motor, ultrasonic sensor & sound sensor. With the ultrasonic sensor the distance of an object will be detected and the servo motor will rotate from 0 to 90 degree and the door opens .Then the sound sensor will detect the sound of a clap and will turn on the lights in the room. 

#include<Servo.h>

int trig=6;

int echo=5;

int dt=10;

Servo servo;

int distance,duration;

void setup() {

  // put your setup code here, to run once:

pinMode(trig,OUTPUT);

pinMode(echo,INPUT);

Serial.begin(9600);

servo.attach(11);

}

void loop() {

  // put your main code here, to run repeatedly:

calc_dis();

servo.write(0);

  if (distance < 50){

  servo.write(90);

  delay(3000);

   }

  else{

    servo.write(0);}

delay(3000);

}

void calc_dis()

{

 // int duration,distance;

  digitalWrite(trig, LOW);

  delayMicroseconds(2);

  digitalWrite(trig,HIGH);

  delay(dt);

  digitalWrite(trig,LOW);

  duration=pulseIn(echo,HIGH);

  distance = (duration/2) / 29.1;

  Serial.println(distance);

  Serial.println(“cm”);

//  return distance;

}

define sensorPin 7

define LED 13

int soundValue;
int lastSoundValue;
long lastNoiseTime = 0;
long currentNoiseTime = 0;
long lastLightChange = 0;
int ledStatus = LOW;

void setup() {
pinMode(sensorPin, INPUT);
pinMode(LED, OUTPUT);
Serial.begin(9600);
}

void loop() {
soundValue = digitalRead(sensorPin);
currentNoiseTime = millis();
if (soundValue == 1) { // if there is currently a noise
if (
(currentNoiseTime > lastNoiseTime + 200) && // to debounce a sound occurring in more than a loop cycle as a single noise
(lastSoundValue == 0) // if it was silent before
){ ledStatus = !ledStatus; digitalWrite(LED, ledStatus); lastLightChange = currentNoiseTime; } lastNoiseTime = currentNoiseTime;

}

lastSoundValue = soundValue;
Serial.print(soundValue);
}