This circuit was found in an American 1980s documentation. It analyzes the exhaust gas of a vehicle using a special sensor. The indicator is a milliamperimeter.
We found this circuit in an old publication on oscilloscopes. Its purpose is to observe the Ie /...
This is another one of the many versions of electronic data that we have on this website. Once...
Found in documentation for radio amateurs of the 70's, this circuit generates signals from 18 to 24...