This dimmer for incandescent lamps using triac and an LF7237 IC was found in May 1985 Radio Electronics magazine. The circuit supports extension buttons.
We found this circuit in a 1980s documentation. The circuit uses general purpose transistors,...
This simple circuit for experimental LED sequencing is based on a multivibrator with transistors....
This circuit is from an American documentation from 1975. The circuit uses components of the time...