This circuit was found in documentation from the 90s. The operational amplifier is NE5514, which is uncommon today. The configuration can be adapted to use modern components.
This traditional oscillator uses two complementary transistors to produce low frequency signals....
This oscillator produces a rectangular signal in the range of 100 Hz to 1k Hz but with the change of...
This electronic “windsock” is operated by a magnetic switching system. It was found in a Radio...