This circuit from General Electric was found in a 1967 documentation. The SCR is of the time, as are the transistors, but equivalents can be used.
In fact, it is a night light system that automatically turns on the outside lights when it gets...
This is one of many twin-T oscillator configurations that can be found in this section and on this...
Found in 1965 General Electric documentation this circuit applies to a LASCR used as an optical...