DIY Hacks & How To’s: Laser Tripwire

DIY Hacks & How To’s: Laser Tripwire

No security system is complete without lasers. We have all seen movies where the main character has to get past a high tech security system and there is always a room full of lasers somewhere.

So in this project, I show you how to build a laser tripwire alarm. All you need is a cheap laser point, a couple of mirrors, and a few dollars of electrical parts. With this you can cover an entire house with an array of light beams. If any one of them is crossed it sets off your alarm. And unlike in the movies, these lasers are practically invisible.

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Comments

Lingua Veritatis says:

I want to build a wire trap game for my kids so the laser need to be visible in the dark but not too dangerous for the eyes. Any suggestions for a laser pointer?

Zack Zuniga says:

Add a strobe light and bigger sirens and make it outdoor compatible/weather proof

Vandana Mavi says:

what are the components in the circuit diagram. they are numbered but i cant figure them out

John Sanford says:

like macgyver

Syafiq Ahmad says:

nice project

Amaey Paradkar says:

Value of R1 resistor?

Harshit Yashwardhan says:

What is the requirements

Adam Lentz says:

on this episode of make shit I'll never actually make:

Jacob Harrington says:

English please

Benito Pozos says:

just finished testing it! Thanks bro, really enjoyed putting it together.

mazombieme says:

Place a turret behind it

Abbey says:

Me at 2:00 am: watching a video on how to make a fucking laser trip wire alarm

Synoot says:

This isn't science fiction anymore, because it never was.

Mori Ono says:

omg the audio

The Redstone Channel says:

i made it and it stoped my house from being robbed becuase i set it up to call 911 thanks

No1sonuk says:

If you're going to use an arduino at all, you might as well bypass the 555 and use an analogue input to monitor the LDR.

Manesh CS says:

Simply awesome 🙂

Drake_Stonehold says:

Managed to hook it up to a car battery, overkill anyone?

Alex Jamieson says:

run it all off a 5VDC power supply

Julio Alonso says:

Having the current issue:

Once Resistor values are calculated, I am having an issue turning off the alarm with the laser. – Constant sound.

Any troubleshooting ideas?

Jasmine Chelton says:

how do ya turn it off

Eldrerol says:

Something cool would be to get and app or something on your phone and have it send an alert to your phone every time the "low" power was recieved in the circuit, so every time some one interupted the beam your phone would be alerted

Supachai Abusali says:

where can i get the source code for this?

longsitedave says:

Does anyone know How to connect this to a circuit which is in monostable mode which has a timed output, such that once the lasers has been interfered with, the buzzer goes off for as long as the times output

Cameron Crosby says:

As soon as i turn it on, it beaps

Alexander Petsopoulos says:

In the picture with the breadboard what are the 4 wires coming off the far left breadboard connected to

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