This circuit uses an optical coupler called Raystor created by Raytheon in the 1960s. The circuit uses components from the era that can be changed. The current is low.
The power transistors of this 80's circuit should have at least 10 A current collector and mounted on...
The transmitter can be that of CB9574E. This receiver uses a PLL to directly trigger a sensitive relay....
Raytheon's used integrated circuit is uncommon today. However, the configuration is an example and can be...