Tesla’s Spirit Radio uses a simple crystal radio circuit connected to a computer sound-in jack to generate spooky sounds from all kinds of electromagnetic sources. As you will see, it creeped the hell out of Tesla himself, according to Higher.
DIY: Building a Tesla Coil In 9 Easy Steps! - DIY: Building a Tesla Coil In 9 Easy Steps! “ With Halloween right around the corner, there’s no better time to build your very own Tesla Coil! Please read each of these points thoroughly before.