Using the 741 this basic circuit was found in the November 1973 Radio Electronics magazine. The power supply must be symmetrical. The components can be recalculated for other frequencies.
This circuit was found in a 90’s 303 Circuits. The components are from the period and the heating...
This circuit was found in a 1987 magazine. It consists of an oscillator controlled by the...
This circuit was obtained in a 90s American documentation. The integrated circuit used is uncommon...