Faraday Cage Explained
A Faraday Cage sometimes called a Faraday Shield is a type of enclosure that is used to create a protective barrier that blocks electromagnetic fields. It gained its name from its creator an English scientist called Michael Faraday who invented the cage in 1836.
A Faraday cage is made from conductive materials such as aluminum foil or steel mesh. You can easily create your own simple Faraday cage for very little cost. There’s every chance you already have the basic components you need lying around the home.
For instance a using metal bin or making a wooden frame and covering it with steel mesh. There are many DIY project tutorials available online that can help you with this.
We will go into more detail on the subject of DIY cages in future posts, but for now, a quick example of a simple DIY project is using an old shoe box and wrapping it in several layers of foil. Ensuring that exterior of the lid and box are fully wrapped to make a full conductive seal when closed to protect its contents.
How does a Faraday Cage Work?
The conductive material that a Faraday cage is made of distributes electric charges around the cages external structure thus creating an external barrier in the form of an electric field. This field protects the cages interior and its contents.
Faraday cages are used to protect sensitive electronic equipment from external radio frequencies and high levels of static and non-static electricity including EMP’s.
As a Prepper, you’ve probably already heard the term Electromagnetic pulse (EMP). EMP disturbances or attacks are short but very intense bursts, pulses of electromagnetic energy. The source of such a pulse can be from either a natural occurrence or a man-made one.
A few examples of what could cause an EMP pulse are:
- Close lightning strike
- Solar flare
- Nuclear electromagnetic pulse (NEMP)
- Powerline surges
Both man-made and natural and EMP sources can damage sensitive electronic equipment. There have also been reports that EMP weapons have been developed that would create the damaging effects of high-energy EMP.
Whatever SHTF scenario you are preparing for Faraday cages are an excellent way to effectively shield your electronic equipment from man-made or natural EMP occurrences.