If you’re looking for a 1-second time reference, you’d probably just grab a GPS module off the shelf and use the 1PPS output. As demonstrated by [InazumaDenki], though, an old quartz clock module can ...

Of all the projects you can build in your workshop, one of the easiest is a wall clock. You can buy quartz clockworks and hands in kits for about $6 at many places -- home centers, woodworking stores, ...