This circuit was obtained from a 1967 GE SCR manual. The SCRs must be rated for the wattage of the controlled heating element.
This control panel allows the use of NO and NC sensors, turning the alarm on after 30 seconds...
This circuit, found in a 1989 publication, only works with incandescent lamps. The maximum power...
We found this circuit in a 1968 Electronics World. The potentiometer should be set to trigger the SCR...