We found this circuit in an 80s Intersil documentation. Modern equivalent operating systems can be used. The potentiometer adjusts the detection level.
This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit...
Using a piezoelectric sensor of the time, this circuit was found in the February 1994 issue of...
The figure shows how to use an oscilloscope for diode test. The circuit presents the...