i-Ruler.ino

//A simple distance measuring device using Arduino UNO, an ultrasonic sensor and a LCD display.



#include <LiquidCrystal.h>
 
#define trigger A1   // pins of ultra sonic sensor
#define echo A2
 
LiquidCrystal lcd(13,12,8,7,4,2);
 
float time=0,distance=0;
 
void setup()
{
 lcd.begin(16,2);
 pinMode(trigger,OUTPUT);
 pinMode(echo,INPUT);
 lcd.print(" Ultra sonic");
 lcd.setCursor(0,1);
 lcd.print("Distance Meter");
 delay(2000);
 lcd.clear();
 lcd.print(" TEAM ADHARSH ");
 delay(2000);
}
 
void loop()
{
 lcd.clear();
 digitalWrite(trigger,LOW);
 delayMicroseconds(2);
 digitalWrite(trigger,HIGH);
 delayMicroseconds(10);
 digitalWrite(trigger,LOW);
 delayMicroseconds(2);
 time=pulseIn(echo,HIGH);
 distance=time*340/20000;
 lcd.clear();
 lcd.print("Distance:");
 lcd.print(distance);
 lcd.print("cm");
 lcd.setCursor(0,1);
 lcd.print("Distance:");
 lcd.print(distance/100);
 lcd.print("m");
 delay(1000);
}