A timer switch is designed to turn power off/on at a preset time to control different electrical circuits in your home, commercial or industrial settings. Timer switches use internal components, such as gears or springs and levers, to function as timers. The primary goal of timer switches is to conserve energy and save money by eliminating the need to leave electrical circuits or equipment running continuously. Timer switches come in two types: mechanical and electronic. Mechanical timer switches are analog devices that use a clockwork mechanism to control when power is turned on and off. On the other hand, electronic timer switches are digital devices that operate using an internal clock and microprocessor, controlling when power is turned on and off with accuracy.