How to Build Your Own Faraday Cage

You need a secured enclosure for blocking out the negative effects of electromagnetic interference (EMI) or for protecting your expensive electronic devices from electromagnetic pulse (EMP). Try doing what Michael Faraday did in the 1830s, and make your own Faraday cage. The reason could be ensuring safety of your devices or taking time off and […]



You need a secured enclosure for blocking out the negative effects of electromagnetic interference (EMI) or for protecting your expensive electronic devices from electromagnetic pulse (EMP). Try doing what Michael Faraday did in the 1830s, and make your own Faraday cage. The reason could be ensuring safety of your devices or taking time off and unplugging yourself from the 21st century electronic communication. A Faraday cage is a shielded enclosure that offers you an escape from electromagnetic fields and their interference. Generally, people ask professional help in designing and implementing these enclosures. But, for simple or small requirements, you can give DIY a try.

What Do You Need To Build The Faraday Container?

You need a couple of things to design the protective enclosure. You can find most of the items in departmental stores. So, get your notebook and take down the following list of items:

  • Aluminum foil
  • Plastic bags
  • Pieces of cloth
  • Cardboard boxes of preferred size
  • The items you need to store in the cage

Buy a considerable amount of aluminum foil, as you need it to wrap the devices multiple times. For plastic bags, you don’t need to be picky, any would work fine. You can re-purpose your old T-shirts and use them for cloth. Using a small cardboard box as the container would be best for the first timers, as it would prevent both mistakes and waste of resources. Lastly, gather the items you need to put in the container.

How to Make The Container?

Although the DIY process is comparatively simple, protecting complex industrial or sensitive materials calls for professional help. Follow these steps for making your own at-home Faraday cage:

  • Start with wrapping the electronic devices with pieces of cloths and keep the edges carefully covered so that they do not tear the cardboard box.
  • After clothing your electronic device, put it in a plastic bag or wrap it with plastic.
  • Now use the foil to wrap the item multiple times. The more the aluminum layers covering the item, the better will be the protection.
  • Now put the items in the container or cardboard box safely and cover it with aluminum foil. Do it twice and keep the container above the ground level.

Ta-da! Your very own Faraday Cage is done. However, as you may have guessed, it is in a very crude form, and you cannot count on it for protecting super-sensitive stuffs.

Developing Faraday cages on a larger scale that shoulder huge responsibility in blocking or reflecting EMI or EMF, is a fairly complex process. It is best to consult a professional if you need help on a more advanced level. In today’s world, shielded enclosures have become mandatory. In fact, most equipment you see such as the cell phone in your pocket or the laptop on your desk, come with proper shielding mechanisms. Many argue that a refrigerator or microwave oven can work as a Faraday cage, but it is still just a theory.

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