• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
emergency preparedness

Simply Preparing

Survival blog for disaster and emergency preparedness.

  • Home
  • About Simply Preparing
  • Beginning Prepping
  • Simple & Inexpensive Prepper Projects

Faraday Cage Fail

October 25, 2012 By Prepared Mom

We may earn money or products from the companies mentioned or linked to in this post, including Amazon Affiliate links

This week I tried to build a Faraday Cage. I failed. So instead of this post being about how to build a safe place to keep your electronics, it is now about how I failed at it.

For those of you wondering what the heck I am talking about…A Faraday Cage is a shield that blocks external electric fields. Regardless of its name, it has nothing to do with a LOST character. Why would one need to build a Faraday Cage you ask? The theory is that if an EMP (ElectroMagnetic Pulse) were to occur, all electronic equipment in its area would be destroyed. Placing electronics inside a Faraday Cage protects them from the damage of the pulse. It’s the same reason your cell phone often doesn’t work in an elevator. Pulses can be caused by several things but the prevailing thoughts are that an EMP would come in the form of either a terrorist attack or a solar flare.

EMP bags can be purchased to protect your equipment or you can follow one of the hundreds of youtube videos that claim to help you DIY your own.

I was under the impression all you needed was a steel or other metal container, foam, and cloth to wrap the items in. So I started with my supplies gathered. I was attempting to store away one NOAA radio, an old cell phone, batteries and some AA universal battery chargers for the phone and radio.

Items gathered for DIY Faraday Cage Project
Items gathered for DIY Faraday Cage Project

I had this cute tin I had purchased awhile back from Home Goods. Bonus, no one would realize it right?

Decorative aluminum tin for Faraday Cage
Home Goods- $6. Pretty cage material, huh?
green craft foam to act as insulator in faraday cage
You need to insulate the electronics inside from coming in contact with the metal container. I used 1/2 crafters foam I had around in the garage from an old project.
foam liner for faraday cage
Next I lined the entire tin with the foam and shaped it to fit inside.
electronics wrapped for faraday cage
I wrapped each electronic separately with an old towel and put 3 packs of 4 AA batteries in with them and a few battery chargers that fit the electronics.
Finished Faraday Project
I finished it all up and was quite proud of myself. Who said prepping couldn’t be fashionable?

And then I go the bright idea to test it. I opened it back up and put my cell phone and called it. I was pretty embarrassed to find that I could hear my cell phone ringing. Yikes. It clearly wasn’t blocking the signal. So ,what went wrong? I have a couple theories.

  1. The tin I was using may not be aluminum, steel or thick enough.
  2. I may need to duct tape the lid completely which would ruin my decorator look.
  3. The foam inside wasn’t thick enough.

I will be continuing to test different ways to do this and would love to hear your theories (besides me just being an idiot) as to what I did wrong in the comments. I will post the results so that you can also build one when I get it right. Until then, I think I will investgate the ready made ones and see if that just maybe a prep worth paying for!

 

 

 

 

Filed Under: Alternate Uses Tagged With: DIY Preps, faraday cage, yuppy prepping

Reader Interactions

Comments

  1. The Reluctant Prepper says

    January 17, 2013 at 6:40 am

    You might try using metal tape (available at the hardware store) to see the lid. One piece all the way around.

    Keep trying!

    TRP

  2. Lux says

    February 12, 2013 at 4:53 pm

    Here is the instructable for a Faraday cage that is easy to make (modify) and will look good in the house. It also doubles as a file cabinet

    http://www.instructables.com/id/Stylish-Two-Drawer-Faraday-Cage/?ALLSTEPS

    • Prepared Mom says

      February 14, 2013 at 8:48 am

      Thanks! I’ll try and let you know how it turns out

  3. Freedom Preppers says

    February 24, 2013 at 6:25 pm

    Try something heavier, like a galvanized trash can & lid. Also, wrap each individual item in heavy duty aluminum file 3-4 times. Your foam padding is good. Make sure it does not interfere with a good seal of your lid.

    • Prepared Mom says

      February 24, 2013 at 7:15 pm

      That is what I am thinking. I need to get a heavy trash can. Thanks

  4. jeff says

    April 8, 2013 at 10:14 pm

    hi there it sounds like you need to ground your faraday cage. i would try that. also in a successful emp attack the cell towers probly wont function any more might be better off with radio equipment

  5. Team says

    May 20, 2021 at 5:03 pm

    Fantastic web site. A lot of useful info here. I’m sending it to
    a few pals ans also sharing in delicious. And obviously, thanks to your
    sweat!

Primary Sidebar

Simple & Inexpensive Preps

WHAT Is A Boil Water Notice How Can You Survive It_

How To Survive A Boil Notice

A boil notice is issued when a municipal water provider detects dangerous pathogens and microorganisms in the water that can make us sick.  Other … [Read More...] about How To Survive A Boil Notice

Privacy Policy and Cookies

This site uses cookies. Please read our Privacy Policy so you fully understand how we use them.

Affiliate Disclosure

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

Emergency Planning Basics

Calculating Drinking Water Storage Needs
Breaking Down Prepping Into Small Chunks
Family Emergency Plan Series

Food Storage

Ham and Cheese Egg Muffin Recipe

Ham and Cheese Egg Muffin Recipe

We are grab and go breakfast people at our house.   Since my kids were little,  the best way to make sure everyone  got a good breakfast was to have ready made items stashed away in the freezer. Luckily, this Sausage and Cheese Egg Muffin Recipe is super easy to make in bulk.  Consequently, the only […]

Surviving In Style

Why There Must Be An Israeli Bandage In Every Emergency Kit

An Israeli Bandage In Every Emergency Kit

The Israeli Bandage  was created by the Israeli Defense Force to save lives during combat. The pressure applicator on an Israeli Bandage exerts 30 … [Read More...] about An Israeli Bandage In Every Emergency Kit

Alternate Uses

Diatomaceous Earth Uses

Diatomaceous Earth Uses And Benefits

Have you ever heard of diatomaceous earth?  No?  Then today is your lucky day.  Read on to discover  diatomaceous earth uses to benefit your home, … [Read More...] about Diatomaceous Earth Uses And Benefits

Why Worry About Preparing?

Preparedness for a disaster makes a lot of sense. With recent and predicted events like Hurricane Sandy, The Colorado Wildfires, Fiscal Cliffs, and rising food and gas costs just in 2012 there is no denying that things are changing in our world. Whether or not you believe "The End of the World As We Know It" is near there are plenty of everyday things to worry about: loss of a job, health emergency, local weather events to name a few.

I find that I worry less about the big "what if's" out there the more emergency planning my family does to deal with the unexpected. I will share the survival tips and tricks I have learned while on this preparedness journey and hope that you join in with lots of comments. We all have a lot to learn from one another.

Now, lets get started prepping! Pick a post and start reading. At the end of every post the blog randomly selects three more survival posts for you to check out. Set aside 10 minutes a day to build your preppers knowledge base. We can never be done learning or prepping, right?

Things To Know

  • Advertising
  • Privacy Policies

Copyright © 2025 Indigo Ink, LLC: Simply Preparing Disaster and Emergency Preparedness · WordPress · Log in