We found this circuit in a French documentation from the 80's. The components used are still common and the circuit can generate signals from 10 Hz to 100 kHz.
This circuit is from a 1977 timers Cookbook, but can still be easily assembled with the eventual 3130...
This circuit can be used to activate the lamp when it gets dark. We found the circuit in old...
This adjustable source was found in a 1979 documentation, but all components are still common...