An EMF detector will help you find invisible electromagnetic fields, and you can make an inexpensive one for under ten dollars. This will only detect the presence of a field, you will need other tools to be able to measure its strength.
Make a Emf
An EMF detector lets you pick up on electromagnetic fields, a useful tool if you're into amateur ghosthunting. To make this, you will need some wire, a resistor, and an LED. You will also need an Arduino to use as a controller.
Welcome back, my nascent hackers! In the conclusion of the Mr. Robot television series, Elliot and fsociety successfully completed their mission of encrypting all of Evil Corp's data with AES-128 encryption and destroying the key. Now that all of the data on Evil Corp's serv ...more
Just about every household gadget we own runs on 1.5 volt batteries of one size or another. Wouldn't it be great if you could reuse all of those dead AA, AAA, and D batteries after they've passed on? It turns out you can make a simple circuit called a "Joule Thief" to reanimat ...more
Hello again fellow hackers. First of all, sorry that this Opinion Tuesday came a week late, but I couldn't make it home in time last week due to the terror attacks in Brussels. I'm safe and sound, though! Today, I'm reviewing an interesting article that happened some time ago ...more