This circuit was found in the July 1998 issue of Electronis Now magazine. It is a traditional gated version of the 4049 and has its frequency controlled by R2.
Found in a 1990s American technical brochure, this circuit is intended for alarms that use as...
This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now...
Found in a 1965 General Electric documentation, this circuit is intended to control a 150 W lamp...