This zero-crossing switch circuit was found in documentation from the 1990s. GE's PA424 is the main element of the circuit, uncommon today.
The circuit shown in the figure is suggested by Texas Instruments (www.ti.com) and makes use of...
This circuit, from an American documentation from 1975, can be assembled with modern transistors such as...
This circuit was found in a Radio Electronics magazine from November 1992. The components are from...