This article describes how to build and operate a LED gauge. Having this handy gauge makes checking the alignment on a variety of tools--table saw, band saw, jointer, miter saw--a snap. A parts list is included in this article. (Contains 1 figure and 8 photos.)

The Technology Department at Appalachian State University runs a metals lab to introduce students to basic metalworking processes. Many of the students have never worked with metal before. The class objectives call for teaching students metal properties, processing, and design problem solving. The average student is a 20-year-old junior whom…