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 in multiple …
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 Does a Relay Work? A Complete Guide - Microchip USA
Aug 22, 2025 · Learn how relays work, their types, and applications in automation, safety, and electronics. Choose the right relay for your project with this guide.
Relay | Switching, Contacts, Circuitry | Britannica
Dec 20, 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. For example, in a …
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 current operates a relay.
Electrical Relays: How They Work and Their Applications
An electrical relay is an electrically operated switch that uses an electromagnet to control one or more sets of contacts. Relays allow a low-power signal to control a high-power circuit, providing isolation …
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.