This high-power shield is isolated from the control. The circuit was found in the June 1995 Electronics Now magazine. The Triac must be equipped with a heat sink.
In fact, this circuit found in a 1960 transistor manual from Sylvania, simply turns on a lamp when...
This circuit was found in a 1980s documentation but can be easily assembled even today by the...
This circuit with a 4046 PLL was found in the December 1989 issue of Radio Electronics magazine. The...