HomeMade Rat Trap Alarm System!!!




About: I'm just a prankster and love life hacks

Why spend hundreds of dollars on Security Systems? When You can make your own. Watch this Instructable to learn how you can make your very own Alarm System Using a Rat Trap.

Click Here For Instructional Video

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Step 1: Materials!!!

You will need the Following Items

*Rat Trap or Mouse Trap
*Battery Holder W/ Batteries
*Ring Terminal
*Two 12 in pieces of wire -( Length is up to you)

Total Cost- 12-15 dollars

Step 2: Make Alarm System!!!

*First Begin By Connecting the The Battery Holder with the Buzzer- Positive Wires Only
(Buzzer +) with (Battery Holder+)
*Strip The ends on the extensions and Connect them with The Negative Wires
(Buzzer-) with (Extension A) and (Battery Holder- With (Extension B)

*Refer to the Diagram Below

  • On the Snapper of the Rat Trap wrap around the bare end of one of the Extensions (extension A)
  • On The Other extension (Extension B) Attach the Ring Terminal And Glue it on the base of the edge.
(Make sure its Vertically below Extension A)

Step 3: Set Up Your Device

*Next to wall Near the Door you want to Protect, tape Both the Battery Holder and the Buzzer

*Activate The Rat Trap And Leave it Behind the Door....

Now you can feel more safer.

Step 4: Your Home Is Now Protected

When the Robber (thief) opens the door, the Rat Trap behind it will go off, once the door comes in contact with it.

Extension A and B will Come Together, Therefore activating the buzzer.
the loud Noise is bound to scare the Robber away and alert someone near by.

If you want to see the Full Results, Watch the Instructional Video Below.

Instructional Video

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    18 Discussions


    6 years ago

    I did my project by myself


    6 years ago

    And needed it for a project


    6 years ago

    Nice but my battier smoked

    mr. clean

    9 years ago on Introduction

    that is a very good idea simple too but i have 1 question why r u wearing rubber gloves in all the pics? trying not to leave finger prints lol.

    2 replies

    10 years ago on Step 1

    how did u guys make tat does it kill a rat????


    10 years ago on Step 4

    Your design is great in concept but has one major flaw. you failed to for something getting between your contacts, for example a real rat or feline pet.


    I used mouse traps to train my dogs to stay off the living room furniture. I showed them a "set" trap a couple of times, springing it each time (SNAP!) Believe it or not, they learned to tell the difference between a "set" trap and a "sprung" trap so they were not deterred if the "sprung" trap was placed on the cushion. I used "set" traps when I found this out. Got my wife a couple of times - ha ha. A nice loud alarm would probably be funny but might get me divorced.


    10 years ago on Introduction

    Cool tutorial, I bet this project would be ideal for pranks too. lol


    10 years ago on Introduction

    Good idea and instructions! The video really helped to see the execution of it too. Thanks!