Distansometer

Distance measuring device

It is a device used to  measure the distance between two objects or walls without practically touching them. Just place the device anywhere between the objects and the LCD screen displays distance measured.

Model :

Youtube: video

Prototype 01

 Circuit:


Components:

Code:

#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd_1(0);


int echo1 = 9;

int trig1 = 8;

int echo2 = 6;

int trig2 = 7;

float duration1, distance1;

float duration2, distance2;

int d = 10;  //d is Distance between two HC-SR04

int totalDistance = 0;

void setup()

{

  lcd_1.begin(16, 2);

  lcd_1.print("Distance:");

  pinMode(trig1, OUTPUT);

  pinMode(echo1, INPUT);

  pinMode(trig2, OUTPUT);

  pinMode(echo2, INPUT);

  Serial.begin(9600);

}


void loop()

{

  digitalWrite(trig1, LOW);

  delayMicroseconds(2);

  digitalWrite(trig1, HIGH);

  delayMicroseconds(10);

  digitalWrite(trig1, LOW);

  duration1 = pulseIn(echo1, HIGH);

  distance1 = (duration1*0.0343)/2;

  Serial.println(distance1);

  

  digitalWrite(trig2, LOW);

  delayMicroseconds(2);

  digitalWrite(trig2, HIGH);

  delayMicroseconds(10);

  digitalWrite(trig2, LOW);

  duration2 = pulseIn(echo2, HIGH);

  distance2 = (duration2*0.0343)/2;

  Serial.println(distance2);

  

  delay(10);

  

 totalDistance = distance1+distance2+d;

  

  Serial.print("Distance: ");

  Serial.println(totalDistance);

  

  lcd_1.setCursor(0, 1);

  lcd_1.print(totalDistance);

  lcd_1.print("cm");

  delay(10);

}

Prototype 02

 Circuit:

Same circuit connections accept a Switch
YouTube: Simulation

Code:

#include <Adafruit_LiquidCrystal.h>
Adafruit_LiquidCrystal lcd_1(0);

int Switch = 2;
int echo1 = 9;
int trig1 = 8;
int echo2 = 7;
int trig2 = 6;

float duration1, distance1;
float duration2, distance2;

int d = 10;  //d is Distance between two HC-SR04s
float totalDistance = 0;

void setup()
{
  lcd_1.begin(16, 2);
  lcd_1.print("Press button to");
  lcd_1.setCursor(0, 1);
  lcd_1.print("Measure distance");
  pinMode(Switch, INPUT);
  pinMode(trig1, OUTPUT);
  pinMode(echo1, INPUT);
  pinMode(trig2, OUTPUT);
  pinMode(echo2, INPUT);
  Serial.begin(9600);
}

void loop()
{
  if (digitalRead(Switch))
  {
    delay(50);
    digitalWrite(trig1, LOW);
    delayMicroseconds(2);
    digitalWrite(trig1, HIGH);
    delayMicroseconds(10);
    digitalWrite(trig1, LOW);
    duration1 = pulseIn(echo1, HIGH);
    distance1 = (duration1 * 0.0343) / 2;

    Serial.println(distance1);

    digitalWrite(trig2, LOW);
    delayMicroseconds(2);
    digitalWrite(trig2, HIGH);
    delayMicroseconds(10);
    digitalWrite(trig2, LOW);
    duration2 = pulseIn(echo2, HIGH);
    distance2 = (duration2 * 0.0343) / 2;

    Serial.println(distance2);

    totalDistance = distance1 + distance2 + d;

    Serial.print("Distance: ");
    Serial.println(totalDistance);

    lcd_1.begin(16, 2);
    lcd_1.print("Distance:");
    lcd_1.setCursor(0, 1);
    lcd_1.print(totalDistance);
    lcd_1.print("cm");
    delay(10);
  }
}

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