Working with the previous circuits, this circuit resets after 1 second. The circuit is from Radio Electronics magazine, August 1984. The time can be changed.
This simple MW radio was found in a 1975 publication, but it can be mounted with BC548...
This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now...
This circuit from a 1967 documentation generates 2.5 Hz signals depending on the capacitors used,...