We found this circuit in the February 1987 issue of Radio Electronics magazine. It is based on an integrated RCA triac trigger available at the time. The circuit powers 4 incandescent lamps.
This circuit was obtained in a Maxim documentation from the 90's. The circuit applies to...
Used in satellite TV receptions in the 1980s, this circuit was found in the March 1980 issue of...
We found this circuit in the April 2013 issue of Electronics Now. Any JFET can be used. Note the...