This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of components of the era, but modern equivalents can be used.
This circuit is from a 1992 publication, but can be mounted very easily today. The circuit is...
This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the...
The circuit presented is an interface or shield for capacitance measurement as a PC. We found it...