Unlike most Tesla coils, [Teodor]’s design is able to run with a fairly low input voltage because it doesn’t use a static spark gap like most ... component of his circuit, the relay, is ...

Tesla coils ... eliminates that noisy spark gap. That’s one less source of broadband RF noise and the audible racket these produce. You can buy ready-wound secondary coils from the usual CN ...

Explore the power of wireless energy as you build your own ‘baby Tesla coil’ (or Slayer Exciter) using Lego Technic! This experiment may not be a traditional spark-gap Tesla coil, but it demonstrates ...