This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational equivalents can be used. The FET is a general-purpose type.
This circuit with the known PLL 567 can be found in other versions in this section and in this...
This circuit from a 1967 documentation generates 2.5 Hz signals depending on the capacitors used,...
This circuit uses CMOS integrated circuits and can operate with CMOS logic from 3 to 15 V or TTL...