I run some wire around a large neodymium magnet. Here is the other video I mentioned: https://www.youtube.com/watch?v=YledrMyoqgs Excellent video on the subject by Matthias Wandel: https://www.youtube.com/watch?v=G2XECoY3TKs Help me make videos by donating here: https://www.patreon.com/CodysLab Shorting out the contacts: https://www.youtube.com/watch?v=W91LtHWemdA