Following this trend, [Miro Pavleski] built a digital weighing scale with an analog display that not only looks neat, but also serves as a good demonstration of the way that modern scales work.

If that physical property is weight, you can use what is known as a load cell. [DegrawSt] uses four 50 kg load cells to create a bathroom scale using an Arduino.

Recently used at Purbeck School’s Science Fair, the Scale Wind Tunnel uses two single point load cells and Intuitive2-L digital indicators enabling students to evaluate, amend and improve their LEGO ...