This circuit is designed to analyze the distortion of an audio signal. We found it in an article in the October 1988 Radio Electronics magazine that teaches how to use it.
This circuit was found in the October 1987 Radio Electronics magazine. The triac must be matched to...
Other settings like this can be found on this website. This makes use of old operational...
This circuit was found in a Radio Escuela Gráfica magazine from Argentina published in the 70's....