This zero-crossing circuit was found in the 1989 Radio Electronics Experimenter. The Triac must be controlled according to the load.
The slope of an object causes the sensor, a mercury switch to be triggered. The circuit activates...
This circuit with 5 times gain was found in European documentation from the 1980s. The input and...
Found in a 90s Linear Technology documentation, this circuit uses an operating system of the time....