Make your own tri-square measuring tool with these free plans. It can be made up to a meter in length.
A marking gauge is an essential tool for basic carpentry and joinery. Download this plan to make one for your shop.
This is a link to a Google 3D SketchUp drawing for a set-up gauge for measuring height. You will need the SketchUp software to download this drawing and its freely available online.
The router table in my shop gets lots of use. But it is always difficult to make fine adjustments to the fence. So I built this router table micro-adjuster by using spare parts I had around the shop.
In a short evening, you can turn a few scraps of wood into an accurate, easy-to-use layout tool. It is tough to beat a marking gauge for creating crisp, repeatable layout lines. Consisting of a beam, a sliding fence held in place by a small wedge, and a scribing point, this time-tested tool sets up quickly. Enlarged images of patterns are PDFs.
A pantograph is a handy instrument for copying line drawings or other pictures, and enlarging or reducing them in the process.
Dividing a circle laid out on a workpiece into equal parts does not have to involve tricky math or sophisticated tools. A circular saw blade will do the job at a protractor.
A harmonograph is a pendulum-based drawing board that produces beautiful curvaceous drawings. After you give the large hanging platform a gentle push, gravity works its magic while a pen records the results.