dht 11/22

 

https://arduinogetstarted.com/tutorials/

servo and led

 // C++ code

//

#include <Servo.h>

int angle = 0;

int i = 0;

Servo servo_9;

void setup()

{

  pinMode(5, OUTPUT);

  servo_9.attach(9, 500, 2500);

  pinMode(4, OUTPUT);

  angle = 0;

}

void loop()

{

  while (angle < 180) {

    angle += 1;

    digitalWrite(5, HIGH);

    servo_9.write(angle);

  }

  delay(2000); // Wait for 2000 millisecond(s)

  if (angle == 180) {

    digitalWrite(5, LOW);

  }

  while (angle > 0) {

    angle += -1;

    digitalWrite(4, HIGH);

    servo_9.write(angle);

  }

  delay(2000); // Wait for 2000 millisecond(s)

  digitalWrite(4, LOW);

}

ldr and lcd

// C++ code

//

#include <LiquidCrystal_I2C.h>

int ldr_light = 0;

int darkness = 0;

LiquidCrystal_I2C lcd_2(0x27, 16, 2);

void setup()

{

  lcd_2.init();

  lcd_2.clear();        

  lcd_2.backlight();

  pinMode(A0, INPUT);

  pinMode(7, OUTPUT);

  darkness = 650;

}

void loop()

{

  ldr_light = analogRead(A0);

  lcd_2.setCursor(1,0);

  lcd_2.print("Is it dark ?");

  lcd_2.setCursor(1,1);

  lcd_2.print("darkness=");

  lcd_2.print(ldr_light);

  if (ldr_light < darkness) {

    digitalWrite(7, HIGH);

  } else {

    digitalWrite(7, LOW);

  }

  delay(1000); // Wait for 1000 millisecond(s)

  lcd_2.clear();

}

https://www.build-electronic-circuits.com/arduino-light-sensor/
 

7os ΔΙΑΓΩΝΙΣΜΟΣ ΑΝΟΙΧΤΩΝ ΤΕΧΝΟΛΟΓΙΩΝ ΕΕΛΛΑΚ

 smart dustbin

solar tracker