Unijunction SCR Trigger (CB21469E)

This unusual unijunction transistor SCR firing circuit was found in a General Electric documentation from the 1960s.

Home Security System (CB4868E)
This control panel allows the use of NO and NC sensors, turning the alarm on after 30 seconds...
Lamp Cruiser effect (CB17321E)
This circuit, found in a 1989 publication, only works with incandescent lamps. The maximum power...
Battery Charger (CB6394E)
We found this circuit in a 1968 Electronics World. The potentiometer should be set to trigger the SCR...