This circuit, which can be used to indicate the movement of an object, was found in NASA documentation. The circuit uses a sensor made with liquid in a container as shown in the figure.
This small circuit for the medium or short-wave range, depending on the coil, was found in a...
Found in Electronics Engineering, this sophisticated circuit makes use of components that are...
Found in an Elektor from the 90s, this circuit simulates a rotary switch that provides a BCD...