During a SHTF situation, or even prolonged grid down scenario, your home or property may be vulnerable to break-ins by intruders wanting to get a hold of your supplies. Protecting your home during a grid down may be tricky, as having no power means your alarm systems will be out of order, so it is vital you have another means of alerting yourself to intruders.
This guide will show you how to make a DIY perimeter alarm system which is guaranteed to startle intruders, and alert you as soon as possible.
DIY – How to Make a Perimeter Alarm
The reality of a grid down event is like nothing you have ever experienced before. Imagine having to keep constant watch throughout the night on your property in fear of looters coming for your food and other critical supplies. Sleepless nights will soon catch up on you, making you feel down, tired, and even sick.
A home security system is crucial in a grid down or SHTF event in order to allow you to get some rest. You can build an alarm system which is simple, yet effective for less than $20!
- Cardboard Tube (Plastic is better)
- Air Hron
- Stort Stick
- Fishing Line
- Duct Tape
Now that you know the materials you are going to need to build you perimeter alarm, it’s time to get stuck into it, and build the alarm system.
You are going to need to create your perimeter alarm post. Wrap your fishing line (trip wire) around the post, I used 12lb breaking strain line. Be sure to leave plenty of spare trip wire on the trailing end to ensure that your trip wire can reach the tie off point.
Insert the airhorn into the cardboard tube, and cut it down to size. This step is not essential, but using the cardboard tube means you will not have to dig a new hole every time you need to replace the air horn.
Dig a pit just deep enough for your air horn to neatly fit in. Make sure you have some natural brush or debris in the area to help conceal the air horn.
You will want to bury the alarm about half way from the top, and tightly pack the dirt around it so that there is no chance of it moving.
The next step of the DIY perimeter alarm is to remove the air horn from the tube, and attach a strip of duct tape to the side of the can. Roll a second piece of duct tape up into a ball shape. About the size of a grape is enough. Then, place it on the trigger of the air horn.
Now, fold the duct tape over the trigger, with the ball of tape in place, and secure it, like shown below.
Now, it’s time to setup your post, trip wire and dead fall.
Insert the post into the ground, only inserting a maximum of 1.3 of the overall post. Do this in front of your air horn pit. If you insert too much of the post into the ground, you risk the post not pulling out, and the alarm not triggering.
Place your deadfall on the post (stone). The deadfall mush be heavy enough to be able to push the button on the air horn, and make it sound.
Once the deadfall has been put in place, cover it with some debris or natural brush to camouflage it.
Now to tie off the trip wire for your DIY perimeter alarm system. Tie off the loose end of your trip wire (fishing line) to a fixed object, such as a tree or fence post. Be sure to keep it 3-5 inches above ground level to ensure intruders don’t step over it without triggering it.
Now that you have all this done, that should be your bug out location, or home a little more secure.