Voltage reference (CB20820E)

This circuit was found in documentation from the 1980s. The circuit can be designed based on modern components.

Two Transistors Schmitt Trigger (CB19895E)
This Schmitt trigger was found in old documentation. The transistors can be of the general-purpose type like...
Tone Decoder 567 (CB5069E)
This circuit can be used with previous transmitters to decode a signal transmitted via power grid....
SCR Alarm oscillator (CB6114E)
This circuit was suggested by General Electric in a 1965 documentation. The circuit can be...