Relay - Wikipedia
A relay is an electrically operated switch. It has a set of input terminals for one or more control signals, and a set of operating contact terminals. The switch may have any number of contacts …
What Is Relay? How Relay Works? - Electronics Hub
Sep 11, 2024 · Instead of mechanical operation, a relay deploys an electrical signal to drive an electromagnet, which in turn engages or breaks (connects or disconnects) another circuit.
How Relays Work - HowStuffWorks
May 17, 2024 · Powered by electromagnets, a relay is simply a mechanical switch, and you'll find them all over a typical house or car. Find out what these simple components are doing in all …
How Electrical Relays Work - Circuit Basics
A relay is an electromagnetic switch that opens and closes circuits electromechanically or electronically. A relatively small electric current that can turn on or off a much larger electric …
Relay | Switching, Contacts, Circuitry | Britannica
Sep 30, 2025 · relay, in electricity, electromagnetic device for remote or automatic control of current in one (relay) circuit, using the variation in current in another (energizing) circuit.
What is Relay? - GeeksforGeeks
Jul 23, 2025 · What Is A Relay? A simple electromagnetic switch is a relay that can be used to make or break an electrical connection. Basically, the relay is just like a mechanical switch, but …
How a Relay Works and How to Use It in Circuits
Mar 8, 2024 · Learn how a relay works and how you can use it to turn on/off high-power devices with tiny signals. Includes practical circuit examples.