This circuit works like a solid-state contactor. We find it in General Electric documentation from 1965. SCRs can be modern equivalents according to the controlled load.
Using a CA3130, we found this circuit in an English publication from 1977. The circuit must use a...
We found this circuit in a 1980 documentation. The flasher uses 3 transistors in the configuration of an...
This circuit was found in General Electric's 1965 documentation. It appears elsewhere on the site....