This fast Schmitt trigger operates at frequencies from 10 Hz to 100 Hz, with very short rise time. The circuit is from an American documentation from 1968.
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...