This zero-crossing switch circuit was found in documentation from the 1990s. GE's PA424 is the main element of the circuit, uncommon today.
This circuit was found in a Hands On Electronics with the suggested application an optical link for...
This circuit is from an Electronics World of 1967. The circuit slows down the activation of a...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...