Can relay be used for DC?

Thanks for your quick answer! Those types of relays are rated for DC inductive loads but it scales the contact lifetime due to arcing.

What is a 12V relay used for?

In 12-volt automotive circuits, even small resistance amounts can cause significant voltage drop. Relays provide a solution by shortening the required length of the heavy-gauge, power-delivery wire from the battery or alternator to the load.

How can I make 12V relay module at home?

DIY Relay Module Making

1. Step 1: 12V Relay. Buying Link.
2. Step 2: PCB Board. I have used Dot PCB Board.
3. Step 3: Any PNP Transistor. Use any PNP Transistor Which Can Handle 20mA At least.
4. Step 4: PC817 Opto-Coupler.
5. Step 5: Resistor.
6. Step 6: PCB Mount Screw Terminal Block.
7. Step 7: Push Switch.
8. Step 8: Indicator LED.

What does a DC relay do?

A Electromechanical switch is called as Relay. It reacts as Automatic switch to control (just ON/OFF) large voltage load by using low voltage signal. We use DC (Direct Current) supply to Energize electromagnetic coil placed in relay so, it is referred as DC relay switch.

Are AC and DC relays interchangeable?

Putting dc on an ac coil should work fine but be prepared for the resistance to be low. In other words, If relay is rated at 24 volts ac don’t use 24 volts dc. In theory AC coils can be driven with DC as long as you limit the DC coil current to the level of the AC holding current (to keep the coil from overheating).

Will an AC relay work with DC?

In theory, then, AC can be used to operate a DC relay. Since alternating current decreases to zero every half-cycle (120 times per second for 60 cycle voltage), the relay armature tends to release every half-cycle.

How do you make a homemade relay?

Relay as a switch

1. Take all the material in front of you and then start working on it.
2. First take motor and then attach a wing to it of aluminium if it is not of alluminium then cover it with aluminum foil.
3. Attach a very low power spring to get the restoring torque or force.
4. Attach the motor wire to the signal wire.

How do you use a 12 volt relay?

Connect the relay’s common terminal to your battery supply, which could be the same supply providing power to the coil. Finally, connect the equipment’s power lead to the normally open terminal of your relay. When you use the relay, the contact will then put the voltage on your pin.