How to Make Distance Meter
  Instagram Facebook YouTube Code :-  /* Code Started Distance metre using by ultrasonic sensor Crated By Technical idEas YouTube Channel Link :-  https://youtube.com/channel/UCCJyR_wnt3SxhErsSUP9Wrw */ #include <LiquidCrystal.h> #define trigger 5 #define echo 6   const int rs = 7, en = 9, d4 = 10, d5 = 11, d6 = 12, d7 = 13; LiquidCrystal lcd(rs, en, d4, d5, d6, d7);   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(" Technical idEas");    delay(2000);     }   void loop()     {      lcd.clear();      digitalWrite(trigger,LOW); ...