This circuit is suitable for the calibration of old analog oscilloscopes. It was found in documentation from the 1970s and could be useful if someone is recovering an oscilloscope of the time.
This circuit was found in an American 80's documentation. The operational may be a modern type...
This VFO (Variable Frequency Oscillator ) has the output frequency controlled by a potentiometer....
This circuit produces a warning signal with the programmed current that can reach 4 A. The circuit is...