We are always impressed with something so simple can actually be so complex. For example, what would you think goes into an analog computer? Of course, a “real” analog computer has opamps that can do ...

A strain gauge is used to measure the strain on an object. It is a very thin, flat coil of conductive wire. (Editor's note: strain “gauge” is often spelled as “gage”; why this is so, and which is ...

the Wheatstone bridge circuit, and giving rise to an output voltage proportional to the deformation. The ratio of the change in length to the gauge length is the average strain of the sample between ...