This wide range timer was found in the July 1994 issue of Electronics Now magazine. The circuit drives a relay and is powered by the relay voltage.
This two-transistor circuit was found in American documentation from the 1990s. The circuit can use...
This traditional version of a double time constant dimmer using triac is from the 90s...
This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose...