Circuit Diagram Of Contactor Relay. In relay logic circuits the contacts no and nc are used to indicate normally open or normally close relay circuit. When a relay contact is normally closed nc there is a closed contact when the relay is not energized.
The diagram above is the 5 pin relay wiring diagram. When a relay contact is normally closed nc there is a closed contact when the relay is not energized. We have connected transistor base to arduino pin a0 through a 1k resistor.
Relay and its symbol symbol of relay.
We have connected transistor base to arduino pin a0 through a 1k resistor. The diagram above shows how such a relay can be used to make a latching relay circuitthe circuit has two buttons one is a push to make which closes when pressed but is otherwise open and the other is a push to break which opens when pressed but is otherwise closed. Circuit diagram and working. We identified it from reliable source.