13.紅外線測距儀

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3f,16,2);   // 若LCD 無法啟用，請將0X3F 改為0X27

int x;

float V, Distance ;

void setup() {

Serial.begin(9600);

  lcd.init();                     

  lcd.backlight(); 

  lcd.clear();

}

void loop() {

x = analogRead(A0);

V = x*5.000000/1023.000000 ;

Distance = 60.374*pow(V , -1.16); //GP2Y0A02YK0F (20150)

//Distance = 29.988*pow(V , -1.173); //GP2Y0A21YK (1080)

//Distance = 12.08*pow(V , -1.058);  //GP2YA41SK0F (0430)

lcd.setCursor(0,0);

lcd.print("A0=");

lcd.print(Distance);

lcd.print("    ");

delay(100);

}