This circuit for old flashes with xenon lamps was found in a Radio Electronics magazine from June 1966. The sensor is a photoelectric cell from the time. Power is supplied by a 9 V battery.
The transformer for this project found in a 1986 documentation is an output type, found on old...
This circuit was found in a Popular Electronics from the 90's. It can be implemented with...
This basic configuration can be found in a lot of articles on this site. In this case, the relay...