This circuit with 1W of output was found in a Mullard manual from 1960. The consumption is low and germanium transistors of the time are used.
This is perhaps the first PIC project to appear in a publication. The article is from Radio...
From a 90s Popular Electronics, this circuit emits pulsating signals for different types of...
This circuit for effects on music synthesizers was found in the May 1983 issue of Radio...