Arduino Security Alarm




About: i am gabriel ,from chennai,tamilnadu. I create new gadgets to change the Future

Hi, this is my new arduino security alarm project. I made it with simple materials. An ultra sonic sensor, a led,buzzer,breadboard and my arduino. IF any object move there, the will glow and the buzzer starts beeping.This helps from robbery.This always alert you and little useful in our life.

Step 1: Materials Required:

1.An arduino board

2.a Breadboard ultrasonic sensor(HC-SR04)

4.a Led

5.a buzzer

6.Jumper cables

Step 2: Connect the Ultrasonic Sensor to the Breadboard:

connect the trigger pin to the digital pin 13

connect the eco pin to the digital pin 12

connect vcc to 5v

connect the gnd to the gnd pin

Step 3: Connect the LED and the Buzzer :

connect the cathode of the led to the anode of the buzzer,so you get one +ve and one -ve.

connect the +ve ends of those to the digital pin 10.

connect the -ve ends of those to the digital pin gnd

so you get the led and buzzer to be triggered.

Step 4: Coding......

copy and paste the code to your IDE:(dont worry about the led1)

#define trigPin 13
#define echoPin 12

#define led 11

#define led2 10

void setup() {

Serial.begin (9600);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

pinMode(led, OUTPUT);

pinMode(led2, OUTPUT); }

void loop()

{ long duration, distance;

digitalWrite(trigPin, LOW);

// Added this line delayMicroseconds(2);

// Added this line digitalWrite(trigPin, HIGH);

// delayMicroseconds(1000);

- Removed this line delayMicroseconds(10);

// Added this line digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = (duration/2) / 29.1;

if (distance < 4) { // This is where the LED On/Off happens digitalWrite(led,HIGH); // When the Red condition is met, the Green LED should turn off digitalWrite(led2,LOW); } }

Step 5: You Are Done.



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    3 Discussions


    2 years ago

    Is this your code?


    2 years ago

    quiet useful..........Good