Relay is an electrical switch that can control circuits, with coil, spring, and contact as its parts.

The Types and Importance of Relays in Electrical Technology

In every polar change (positive-negative-positive, etc.), the direction of the current will change as well.

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Electric motors consist of a fixed stator and a rotating rotor, and can be either DC or AC motors. They have evolved to become smaller, lighter

SMD welding is a technology used to solder electronic components. SMD resistors have different value codes.

PLC is an automation device used for control in production lines or machine operations. It is resistant to electrical noise and mechanical shocks.