Minimalistic Time Switch

摘要

A time switch lets you save a considerable amount of energy by switching off equipment when it is not being used. However, time clocks from building merchants tend to be bulky and not especially easy to use. The circuit described here provides a distinctly larger set of features and is very compact, so it can easily be built into an existing piece of equipment. The hardware (Figure 1) can certainly be dubbed 'minimalistic'. The circuit consists of only 24 components, including the connectors and pushbutton switch. It is built around a Maxim DS1337 (IC2), which is a compact real-time clock IC in an SOIC-18 package.