In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
The circuit presented is from an old magazine having been translated and published in a national...
With this name, we found this electronic stethoscope with a coal microphone in a 1957 Raytheon...
This circuit should be placed between a turntable and recorder or playback media from the input to...