This control circuit using a low voltage switch was found in the September 1987 Radio Electronics magazine. The triac must be matched to the load and the mains voltage.
The integrated circuit used by SGS is not common today. The circuit is from the 1982 SGS linear...
This circuit from an old documentation includes the power supply for the 117 V power grid. It can be...
Connected to the output of an audio amplifier or radio this circuit indicates the level of the...