We found this circuit in Radio Electronics from the 90s. The components are current. The sensor is a common general-purpose transistor. The connection to the sensor is made by twisted pair.
This circuit was found in the February 1994 issue of Electronics Now magazine. The circuit uses 6...
This circuit was found in a 1980s General Electric documentation. The circuit uses an operational of...
This circuit was found in documentation from the 1980s. The integrated circuit is from the time...