How does a time-delay switch work?

A time-delay switch operates by incorporating a timing mechanism, usually an electronic timer or relay, that controls when the electrical circuit is completed. When the switch is activated, the timer begins counting down for a predetermined period. Once the countdown reaches zero, the switch allows current to flow, turning on the connected device. This feature is often used for lights, fans, or other appliances to prevent them from being left on unintentionally.