This circuit was found in an Electronics World of 1968. It can be applied to any modern triac and the diac can be any type. The load depends on the triac.
Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The...
This control for a heating element was found in an old documentation. The current in the element...
This circuit is from an American documentation of 1975. The FET may be the BF245 and the relay is of...