This zero-crossing switch circuit was found in documentation from the 1990s. GE's PA424 is the main element of the circuit, uncommon today.
We found this circuit in the April 1975 Radio Electronics magazine. The circuit has a latch and...
We found this sophisticated home alarm in a 1994 documentation. The circuit supports sensors of...
This circuit was found in the 1991 Electronics Experimenter's Handbook. It activates a relay when...