This simple bridge circuit can be used for impedance or resistance measurement using a high impedance earphone as an indicator. The circuit is from an American 80's documentation.
MXT1665T-A Family from Microchip Brings the User Experience of Multi-Touch HMI into the VehicleCHANDLER,...
This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The...
This unusual configuration, due to the component it uses, was found in an old European...