This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational equivalents can be used. The FET is a general-purpose type.
We found this circuit with SCRs and unijunction in a Radio Electronics magazine from June 1969. The...
This circuit was obtained in an old documentation, receiving the medium wave range. L1 has 20 + 60...
You can program the 4018 in other ways, as shown in the figure. In this 7 divider configuration, for...