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Relays

Relays are electrically operated switches that control the flow of current in electrical circuits. These devices allow low-power input signals to control high-power circuits and devices, and provide a safe means of isolation between the two. Relays are typically comprised of a simple coil that is energized by a small voltage, and a set of contacts that are mechanically linked to the coil via a spring. When the coil is energized, it generates a magnetic field that attracts the contacts and causes them to close, completing the circuit so that current flows through the high-power circuit.

You'll find relays in many different types of electrical systems. They can be used for tasks as simple as turning kitchen lights on and off, or for critical safety applications where a device must be disabled or shut down entirely when certain conditions are met.

Relays

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