This high sensitivity sensor was found in a 1967 General Electric SCR manual. The circuit admits equivalents by triggering a load according to the used SCR.
We found this circuit in the April 2013 issue of Electronics Now. Any JFET can be used. Note the...
Found in a 1967 publication by General Electric, this control is intended for motors up to 2 A...
We find this circuit in an American 1980s documentation. It triggers an alarm in the event of a...