This is the traditional configuration of a standard lamp with a rectifier. Only incandescent lamp can be used and for the rectified version a 5 W lamp.
This circuit is from a publication by Newton C. Braga in the United States. The transistor can be...
This circuit is from an old publication from the 70s, but it can be implemented with modern diacs...
This circuit is recommended for alarm systems since it has a good output stage. The circuit is...