The purpose of this pouch is to prevent access to your phone and its data (e.g. location) if and when you so choose. Before placing your phone in the pouch, be sure to put it in airplane mode as the phone will drain its battery trying to find a signal.
If you think you may need a Faraday cage and you don’t want to spend too much time or money and you want it to look nice in your den or home office then this is the project for you. You can use your Faraday cage to store some of your electronic devices when they are not in use and protect them against the effects of a solar storm:
or an electromagnetic pulse from an exoatmospheric nuclear detonation:
If you do not have one already, you will need
Step 1: WHY DO WE NEED IT AND HOW IT WORKS
In technical terms, the "FARADAY PHONE POUCH" is a Faraday cage. At its most basic, a Faraday cage is simply a conductive enclosure. The physical structure of the enclosure determines how effective it is at absorbing electric charge or attenuating RF signals. We're interested in the RF blocking aspects of the Faraday cage, so we'll need to figure out what kind of material we can use.
Most modern cell phones and other personal gadgetry contain a variety of radios that operate up to 2.4 gigahertz, the exception being 802.11ac for Wi-Fi which operates at 5 gigahertz. Let's use this higher measurement as our goal to ensure even greater success at attenuating the lower frequencies. In order to properly block a 5 GHz signal, we'll need to figure out the wavelength and how tight our enclosure needs to be, which we can do with the following equations:
λ = c / f
x = λ / 10
λ = wavelength in meters
c = velocity of light in meters per second
f = frequency in Hertz
x = maximum diameter in metersof any holes in the surface of our Faraday cage
Plugging everything in gives us:
λ = 299,792,458 / 5,000,000,000
λ = 0.0599584916 m
x = 0.0599584916 / 10
x = 0.00599584916 m (~6 mm)
In order to block a 5 GHz signal from entering or leaving our box, we'll need to make sure there are no holes or gaps greater than 6 mm in diameter.
Step 2: Whats Needed
Step 3: Take a Paper
1. Measure the width, height, and depth of your phone (+ case, if you have one).
2. Add 1" to your phone width measurement and 2" to your phone height measurement.
3. Leave an inch or two above the phone so the top can be folded over like an envelope.
Step 4: THE MAIN THING
Step 5: Once Again
Step 6: 3 Pouches Ready
Step 7: Combine Em All
put the foil pouch in the white paper pouch
Step 8: MAKE THEM ALL FIX
Step 9: FARADAY CAGE PHONE POUCH READY
Alternatively, you can use velcro, a safety pin, or any other means to hold down the top flap.
And here's the Wikipedia blurb on Faraday Cages, an excellent source if you want to learn more!
Step 10: A BIGGER POUCH FOR TABLET
For additional information about building, testing and installing Faraday cages, click the link below and check out the videos:
Step 11: Some More Easy Faraday Cages
Place phone inside the Faraday Cage pouch whenever you want to cut off all radio signals coming in and out of your phone.
Curious as to how this works? Awesome! In super simple terms, a Faraday Cage "traps" radio waves in the wires that make up the cage.
In the event of a nuclear strike an EMP or Electromagnetic pulse is released frying all circuits near the area. This inscrutable have taught you how to build a Faraday cage pouch . A Faraday cage is that protects all electrical items placed in it. I'm sure there are better ways to build a Faraday cage but this is a cheap version.
I'm quite happy with the mechanism and the effectiveness of the box (I've successfully failed to call myself during every test!). If you plan on making your own Faraday cage, let me know and show off your work in the comments!
CHALLENGE YOU TO FIND FARADAY CAGE EASIER AND CHEAPER THAN MINE