Do you have any information, including a wiring diagram, that can help me wire my Lionel No. 450 Operating Signal Bridge ...

Achieve max electric fuel pump output and safety using a relay ... SPDT version like this one (Hella PN 007794301, $6.38 at Summit) can control both normally open and normally closed circuits ...

Why feedback is important in system control? Systems approach: input (sensors like thermostats), process (microcontrollers), output (actuators like heaters). Feedback ensures accuracy and stability.