Team Wyarioick:

Published May 9, 2017

Laser Trip Wire

We got our inspiration from a project on hackster.io and challenged ourselves to recreate it.

BeginnerShowcase (no instructions)1 hour1,369

Things used in this project

Hardware components

Arduino UNO

Solderless Breadboard Half Size

Resistor 10k ohm

Jumper wires (generic)

Photo resistor

Laser Pointer

SparkFun Pushbutton switch 12mm

Buzzer

Software apps and online services

Arduino IDE

Story

Our project is mainly supposed to be a gag item in some ways. You can use it for practical purposes too! Our laser trip wire is mainly what it sounds like, a trip wire, with lasers! We have a added a little spin on it by having an alarm go off when the laser is tripped. We decided to make this project because we wanted to use an item that wasn't included with the arduino kit. I happened to have a laser pointer on me the day we were brainstorming, we later landed on the idea of using it for a trip wire. It works quite simply, all you have to do is turn on the laser (and put the strap over the button so it stays on), make sure it's lined up with the photo sensor, and you're good to go! As long as there is something not blocking the laser from reaching the photo sensor, you should have a functional trip wire. But.... if you want to guard something with it, you sure will know when someone (or something) is trying to take your things!

Code

code for alarm

int btn;
int d4 = 294;
int photo;

void setup() {
  // put your setup code here, to run once:
  pinMode(7, INPUT);
  pinMode(2, OUTPUT);
  pinMode(8, INPUT);
  pinMode(9, OUTPUT);
  pinMode(3, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  btn = digitalRead(8);
  if(btn == LOW)
  {
    digitalWrite(9, HIGH);
    delay(500);
    photo = analogRead(0);
    Serial.println(photo);
   while(photo > 700)
    { 
    photo = analogRead(0);
    Serial.println(photo);
    }
  
   
    tone(3, d4);
    delay(500); 
    noTone(3);
    delay(50);
     tone(3, d4);
    delay(500); 
    noTone(3);
    delay(50);
     tone(3, d4);
    delay(500); 
    noTone(3);
    delay(50);
     tone(3, d4);
    delay(500); 
    noTone(3);
    delay(50);
   //add more beeps if you want
    
  }

}

Credits

user768408731

1 project • 0 followers

Contact

Thanks to Nick Perry and Mario DiMatteo.

Comments

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Laser Trip Wire

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

fritzing schematic

fritzing schematic

Code

code for alarm

Credits

user768408731

Comments

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Laser Trip Wire

Laser Trip Wire

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

fritzing schematic

fritzing schematic

Code

code for alarm

Credits

user768408731

Comments

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