What need EMP protection for, are the electronics that will be vital to us in the aftermath of an emp, as we will find ourselves in a world that is very similar to what we had in the 18th century. We will no longer have any sources of electricity available to us. Even if we did, most of the electrically powered things would be ruined by emp.
So which items would be of good use to us in a post emp world? Since we would be left in the dark about the state of our local community, our country and the rest of the world, a handheld dynamo driven fm/am radio would be useful in order to listen for possible governmental broadcasts or other broadcasters who might still be operating.
A handheld set of radios would also come in handy to listen for and communicate with others who might still be in possession of functioning radio equipment. This will also be useful for coordination work in your local community later on.
To charge the batteries of your handheld radio, a portable solar powered battery charger would be very useful, so make sure to add this to your list of things that will need emp protection.
Ignition plugs for your chainsaw (if you have one) might also be good to protect from emp as a chainsaw can help you to produce firewood for cold winters. A chainsaw has relatively low fuel consumption, so it would be a help to you for at least a couple of years.
Some people also emp protect older diesel trucks by doing some minor adjustments to the wiring in the cars, but we will not be covering this topic here.
Building your own emp protection box is very easy and cheap! All you need is either a metal box or canister which provides a tight seal and a few rubber bags.
A metal container will absorb and disperse the magnetic currents, keeping them from entering the inside of the container. This concept is quite old and is also known as a faraday cage. A faraday cage is a tight metal structure which will prevent electrical currents from entering the inside of the cage, simply by transferring the currents around its surface.
If you already have a metal canister then you can test it simply by putting a radio inside it and putting on the lid. If the channel you are tuned into disappears then you have a container that is emp proof.
The next step is to prevent contact with the container and the things that you put in it. Remember that the charge from an emp will travel in the canister material, so any conductive material that is in contact with the canister will be influenced by the charge as well. A simple way to cut of this circuit is to put your electronic devices into two nonconductive rubber bags and seal them. This way the current in the container shell will not transfer into your electronics.
Another tip is to always keep a USB stick at hand, and keep copies of your digital pictures, homemovies etc on this. Keep this stick in your box and you won,´t be running the risk of losing one of the most important things in your life and you will never know if an EMP blast is just local, or if society might be able to bounce back up after some years in the dark.