Notes

using pir sensor:-
Circuit Components
Arduino UNO
16x2 LCD
PIR Sensor
Connecting wires
Bread board
1 k resistor
Power supply
Motor driver
CD case (DVD Troly)


code:-

#include <LiquidCrystal.h>
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

#define PIR_sensor 14
#define m11 0
#define m12 1

void setup()
{
lcd.begin(16, 2);
pinMode(m11, OUTPUT);
pinMode(m12, OUTPUT);
pinMode(PIR_sensor, INPUT);
lcd.print(" Automatic ");
lcd.setCursor(0,1);
lcd.print(" Door Opener ");
delay(3000);
lcd.clear();
lcd.print("CIRCUIT DEGEST ");
delay(2000);
}

void loop()
{
if(digitalRead(PIR_sensor))
{
lcd.setCursor(0,0);
lcd.print("Movement Detected");
lcd.setCursor(0, 1);
lcd.print(" Gate Opened ");
digitalWrite(m11, HIGH); // gate opening
digitalWrite(m12, LOW);
delay(1000);
digitalWrite(m11, LOW); // gate stop for a while
digitalWrite(m12, LOW);
delay(1000);
lcd.clear();
lcd.print(" Gate Closed ");
digitalWrite(m11, LOW); // gate closing
digitalWrite(m12, HIGH);
delay(1000);
digitalWrite(m11, LOW); // gate closed
digitalWrite(m12, LOW);
delay(1000);
}

else
{
lcd.setCursor(0,0);
lcd.print(" No Movement ");
lcd.setCursor(0,1);
lcd.print(" Gate Closed ");
digitalWrite(m11, LOW);
digitalWrite(m12, LOW);
}
}



Temperature recording using MLX90614 (GY906) Infrared temperature sensor
code:-

/* This code works with MLX90614 (GY906) and LCD ic screen
* It measures both ambient and object temperature in Celsius and display it on the screen
*/

#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <Adafruit_MLX90614.h>

#define I2C_ADDR 0x27 //I2C adress, you should use the code to scan the adress first (0x27) here
#define BACKLIGHT_PIN 3 // Declaring LCD Pins
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7

LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
Adafruit_MLX90614 mlx = Adafruit_MLX90614();

void setup() {

mlx.begin();
lcd.begin (16,2);
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH); //Lighting backlight
lcd.home ();

}

void loop() {
lcd.setCursor(0,0);
lcd.print("Ambient ");
lcd.print(mlx.readAmbientTempC());
lcd.print(" C");

lcd.setCursor(0,1);
lcd.print("Target ");
lcd.print(mlx.readObjectTempC());
lcd.print(" C");

delay(1000);

}