Cat 4 relays can maintain normal operation in case of multiple ... Contact orientation refers to the switch's position when a relay coil is not energized. As its name implies, a normally open (NO) ...

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.

Reed relays are electromechanical relays that consist of a reed switch wrapped in a metal coil. They are comprised of at least two overlapping blades, or reeds, which are sealed within a gas-filled ...