A Wheatstone bridge is one of those handy circuits that has plenty of uses in both AC and DC measurements. We probably see them most often in a strain gauge.

half-bridge or full-bridge Wheatstone bridge circuits. Pictured here are tension bars with strain gauges built into them for measuring strain. The one with only one strain gauge is a quarter-bridge.

This includes a deep dive into the piezoresistive effect and how a Wheatstone bridge is used ... in an unusual bridge circuit. Finally, we teach you about how touch screens used in kiosks, PC's and ...