Make Tripwire Security Alarm Using Arduino

Hey friends welcome back today in this tutorial I will show you how to Make Tripwire security Alarm using Arduino.

A tripwire is one of the most basic ways to set up a very simple security system. You cross a line across a pathway. Whenever someone walks through the beam, the buzzer alarm activate. This project is very simple to build since we won't have to modify any parts.

You can watch the tutorial and finished product right here - Make-arduino-laser

You can find all of my projects on https://www.diyprojectslab.com/

Thank You NextPCB

This project is successfully completed because of the help and support from NextPCB.

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Let's get started!

Components

Components

Arduino Nano (Amazon.com)

Buzzer (Amazon.com)

Battery Holder (Amazon.com)

Battery (Amazon.com)

Laser (Amazon.com)

LDR Sensor (Amazon.com)

wire (Amazon.com)

1 / 2

Circuit diagram

Here is the Schematics Diagram for this project. as you can see the circuit diagram is very easy and simple. follow circuit diagram and connect the all components.

1 / 3 • Assemble

Assemble

Plug our Buzzer into GND and Pin D8 of the Arduino.

The LDR will go into GND and Pin D2 of the Arduino.

I provided a image with all pins tagged to make things easier for you.

Programming

Programming

Connect the Arduino with your laptop or PC using usb cable and program your Arduino using the code provided in below.

First, download the Arduino sketch from here

//diyprojectslab.com
const int photo = 2;
const int Buzzer= 8;
void setup()
{
pinMode(Buzzer, OUTPUT);
digitalWrite(Buzzer, LOW);
pinMode(photo, INPUT_PULLUP);
}
void loop() {//if/else loop checks if photoresistor is high or low
if(digitalRead(photo)==HIGH){
digitalWrite(Buzzer, HIGH);
}else{
digitalWrite(Buzzer, LOW);
}

1 / 3 • testing

testing

Mount the Laser Pointer and the Alarm Circuit to Form a Single Beam Tripwire

The simplest way to set up your alarm is as a single beam tripwire. In this configuration the laser pointer is mounted to one side of the walk way and the alarm circuit is mounted to the other. For the tripwire to work, the laser pointer needs to be constantly on. The easiest way to accomplish this is by tightly wrapping a piece of tape around the button.

I hope You like this project

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