12v Dpdt Relay Wiring Diagram

By | March 25, 2023

12v Dpdt Relay Wiring Diagram

A 12v DPDT relay is a type of relay that has two normally open (NO) contacts and two normally closed (NC) contacts. This type of relay is often used to control two different circuits with a single switch. For example, you could use a 12v DPDT relay to control the headlights and the tail lights on a car. The following diagram shows the basic wiring for a 12v DPDT relay: ``` +12V | ---- SPST Switch | ---- Coil | ---- NO1 | ---- NC1 | ---- NO2 | ---- NC2 ``` In this diagram, the SPST switch is used to control the coil of the relay. When the switch is closed, the coil is energized and the contacts change state. This means that NO1 and NC1 will swap states, and NO2 and NC2 will swap states. For example, if NO1 is connected to a light bulb and NC1 is connected to ground, then when the switch is closed, the light bulb will turn on. If NO2 is connected to a second light bulb and NC2 is connected to ground, then when the switch is closed, the second light bulb will turn on. 12v DPDT relays are a versatile and easy-to-use way to control two different circuits with a single switch. They are commonly used in automotive applications, but they can also be used in a variety of other applications. ## How to Wire a 12v DPDT Relay Wiring a 12v DPDT relay is a simple process. The following steps will show you how to wire a relay to control two different circuits with a single switch: 1. Connect the positive terminal of the battery to the "+" terminal of the relay coil. 2. Connect the negative terminal of the battery to the "- " terminal of the relay coil. 3. Connect the switch to the "SPST" terminal of the relay. 4. Connect one of the "NO" terminals of the relay to the positive terminal of the first circuit. 5. Connect the other "NO" terminal of the relay to the negative terminal of the first circuit. 6. Connect one of the "NC" terminals of the relay to the positive terminal of the second circuit. 7. Connect the other "NC" terminal of the relay to the negative terminal of the second circuit. Once the relay is wired, you can use the switch to control the two different circuits. When the switch is closed, the relay will be energized and the contacts will change state. This will cause the first circuit to turn on and the second circuit to turn off. When the switch is open, the relay will be de-energized and the contacts will return to their original state. This will cause the first circuit to turn off and the second circuit to turn on. ## Applications for 12v DPDT Relays 12v DPDT relays are a versatile and easy-to-use control device that can be used in a variety of applications. Some common applications for 12v DPDT relays include: * Controlling headlights and tail lights on a car * Controlling the horn on a car * Controlling the windshield wipers on a car * Controlling the air conditioner on a car * Controlling the power windows on a car * Controlling the door locks on a car * Controlling the alarm system on a car * Controlling the lights on a boat * Controlling the power outlets on a boat * Controlling the fans on a boat * Controlling the bilge pump on a boat * Controlling the trolling motor on a boat These are just a few of the many applications for 12v DPDT relays. With their versatility and ease of use, 12v DPDT relays can be used to control just about anything you can think of. ## Conclusion 12v DPDT relays are a valuable tool for any DIYer or hobbyist. They are easy to use and can be used to control a wide variety of different circuits. If you are looking for a way to control two different circuits with a single switch, then a 12v DPDT relay is the perfect solution for you.


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