This circuit appeared in the September 1973 issue of Radio Electronics magazine and was recommended for a synthesizer project. The circuit is for audio signals and has control inputs.
This circuit was found in a 80s American documentation. The zener diodes determine the points of...
This circuit is from an old manual, but can be easily assembled as the integrated one is still...
In fact, the 556 consists of a double 555, which can be replaced by these integrated ones. The...