Instead, his coil uses a relay in place of a spark gap. [Teodor] built his coil using leftover components from his old school, making good use of some parts that might have otherwise been thrown away.

On the other hand, relays are typically large, expensive, slow, require significant power, add a large coil of wire to the circuit (this can introduce a lot of noise), and have mechanical parts ...

In 2022, the global Small Electromagnetic Relay market achieved a valuation of US$ million. Over the forecast period until 2029, driven by increasing demand across various applications, the market is ...