This power supply was found in a RCA publication from the 1970s. The circuit uses transistors from that time. Modern equivalent transistors can be used.
A recreational application of the 4018 is shown in the figure in which we have electronic dice....
The integrated circuits used in this configuration are not common today. The circuit is from the...
This circuit was obtained in the magazine Eletronica Prática 9 of 1977. The Italian magazine no...