When the relay receives 12 volts of power the relay snaps from the nc position to the no position.
Dpdt relay connection diagram.
This is the diagram below to learn all the pin terminals of a double pole double throw dpdt relay.
Spdt relay dpdt relay relay is a electro mechanical switch used to control high power application through low power signal electronic circuits for an example a simple timer circuit working under 5v dc bias can not control high voltage light bulb by introducing relay component we can easily control light bulb.
Dpdt relay wiring diagram.
The 2 coil terminals is where the voltage is placed in order to energize the coil.
It has 2 terminals and 4 connectors and you can look at the dpdt relay as the equivalent of 2 single pole double throw spdt relays.
The polarity of the voltage does not matter.
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The red led and the dc fan now shut off and the green led and the dc motor now turn on and operate.
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Place the relay s rated coil voltage on these terminals.