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 Tesla coils. Instead, his coil uses a relay in ...

This setup allows the relay to safely control ... As the company explains, photorelays used in battery systems typically need to handle about twice the system voltage. For a 400V system, this ...

Pushing the start button activates a motor controller relay (or contactor, a powerful electromagnet). This allows power to ...