This circuit for heating elements was taken from a 1966 General Electric manual. The SCRs are load-according, and the sensor is 1 ohm.
When the 24 V battery voltage drops below 18 V, this circuit cuts off its discharge. The circuit...
This circuit uses the flip-flops from the previous circuit to implement a 3-digit binary counter. The...
This circuit, suggested by Philips Components, uses as a base a voltage comparator of the type...