This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
The basic configuration for a 4017 when used as a decade divider with one-of-ten decoded outputs...
This very low power circuit is based on the ICL7860. We found it in an Electronics Now from April...
This circuit is from an American manual from 1975. The transistors are types of the time, but...