This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The setting shows your use of the trigger line.
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
This circuit is from a factory manual from the 80s. The circuit can be implemented with more...
This circuit for the logic control of the 555 in a power supply was found in the October 1989...