There are several applications at home or industry for long delay timers (ON or OFF delay). Time delays on the order of seconds can be generated using 555 timer circuits, provided the timing capacitor ...

Delay Circuit: A network designed to delay the transmission of a signal by a defined period, essential for timing adjustments in high-speed electronic circuits.

Just about anything can be made with a 555 Timer, and every circuit is fun to build, which I show in my book “ Essential 555 IC: Design, Configure, and Create Clever Circuits.” ...