This circuit for heating elements was taken from a 1966 General Electric manual. The SCRs are load-according, and the sensor is 1 ohm.
This speed or priority switch set uses two LED indicators and two SCRs in a common configuration. The...
Found in a 90s American documentation, this circuit is used in vehicles with contact breaker. The...
This circuit for activating a relay was found in a Radio Electronics magazine from August 1962. The...