ky-008 Laser Tripwire Security Alarm

lapilipinas (66)in #utopian-io • 8 years ago (edited)

Introduction

This tutorial is an open source arduino project that teaches how to make Arduino LDR sensor Laser Tripwire Security Alarm using keyes ky-008 laser module, light sensor module and buzzer this project is very useful for school and indoor activities.

What Will I Learn?

how to make laser tripwire alarm system

how connect laser module and ldr for security alarm

how to program a code on arduino Desktop IDE

how to connect all the components connection using diagram

HARDWARE

Step 1: Gather all the Requirements

Requirements

keyes - 008 laser module
piezo buzzer
Light sensor module
resistor
1 Led
2 Breadboard /
jumper wires
Type B usb cable
Arduino UNO R3 board
PC

Difficulty

Basic

Tutorial Contents

Step 2: Build the circuit

Experimental Procedures

The arduino UNO R3

has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button. 32k Flash Memory,

source

codes and programs can be uploaded on to it from the easy Arduino computer program. which makes it a very easy way to get started working with embedded electronics. The name R3 is the third, and latest version of Arduino Uno Board

LDR Module

image

the LDr or light dependent resistor is device that is able to detect ambient and light intensity, it provides maximum possible contact area with the two metal films, the cadium sulfur track is used as the photoconductor it contains electrons when light is not contacted with it. As soon as light falls on the sensor, the electrons are liberated and the conductivity of the material increases. it has set of 2 legs, the positive leg in no particular position is connected to 22ok ohms resistor.

connection to arduino

Resistor 22ok ohms attach to LDR one leg
The Black wire attach to LDR other (empty) leg → Arduino Gnd
The Blue wire attach to LDR and resistor same column → Arduino A0
The Red wire attach to resistor empty leg → Arduino 5V

laser Diode module

image

The laser ky- 008 module it resistor appears to be related to a control input and it's too high value (10K) to be a simple series resistor this laser we will use the laser 2-wire connections, current control is external, usually in the form of a current-limiting series resistor of small value which is the signal pin and the GND to circulate the current flow on the module.

connection to arduino

Black wire to arduino GND
Sensor wire to arduino digital pin 7
piezo and LEd

The LED has 2 sets of leg the short one is the common cathode and the long leg will be the VCC, on this procedure place the led on the breadboard vertical rail or on the middle rail, on the long leg connect the 22ok ohms resistor then to digital pin 12 on the arduino. the long short leg should be conncted to GNd pin. the piezo buzzer is a typo mini speaker that produces beeping sound perfect for alarm ringtone, it converts electric power to produce sound. the short leg of the buzz is the common ground, the long is the vcc.

connection to arduino'

Buzzer + to pin 11 on Arduino
Buzzer - to GND on Arduino
Led + to pin 12 on arduino
Led - to pin GND on Arduino

SOFTWARE

Step 3: Dowload the Software and Libraries

If you’re ready to get started, click on the link below then select the version with your operating system.
Dowload the arduino Desktop IDE: https://www.arduino.cc/en/Main/Software
When the download is finished, un-zip it and open up the Arduino folder to confirm that click yes, there are some files and sub-folders inside. The file structure is important so don’t be moving any files around unless you really know what you’re doing.

Step 4: Include libraries to arduino IDE

Once installed the Arduino desktop IDE. open the software then locate the SKETCH tab at the top of the software, navigate ADD ZIP LIBRARY >> then look for the downloaded libraries in the download folder. SELECT the zip file then wait for the process. include all the libraries fo liquidcrystal display.

Step 5: Programming

source code

const int ledPin = 12;
const int buzzerPin = 11;
const int ldrPin = A0;
const int laserPin = 7;
void setup () {
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
pinMode(buzzerPin, OUTPUT);
pinMode(ldrPin, INPUT);
pinMode( laserPin , OUTPUT);
digitalWrite( laserPin , HIGH);
}
void loop() {
int ldrStatus = analogRead(ldrPin);
if (ldrStatus < 700) {
tone(buzzerPin, 100);
digitalWrite(ledPin, HIGH);
delay(100);
noTone(buzzerPin);
digitalWrite(ledPin, LOW);
delay(100);
Serial.println(" ALARM ACTIVATED ");
}
else {
noTone(buzzerPin);
digitalWrite(ledPin, LOW);
Serial.println("ALARM DEACTIVATED");
}
Serial.println( ldrStatus );
//delay(10);
}

Now, you can see if i remove the object that blocks the laser that passes through the LDR the alarm system should activated and the buzzer starts beeping. if you have important things that need to secure use tripwire laser security alarm.