# 12 Volt DC Connected to 120 Volt AC

• John1397
In summary, in this conversation, John is warning against a dangerous idea of using a diode to connect 12 volts DC to 120 volt AC, as it could cause the battery to explode. He also advises against attempting such experiments without proper knowledge and safety precautions. Additionally, he discusses the use of a switch and two relays to control the flow of voltage.
John1397
12 volts DC will travel thru a Diode connected to 120 volt AC , but will it put any load on the battery?

John

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• 12volt To 120 Volt.jpg
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Well, when the AC voltage drops below 12v and then goes into the negative part of its cycle, it will pull current out of the battery, theoretically an infinite amount assuming ideal sources, thereby causing the battery to explode. Don't try this at home, kids !

This is not a good idea. During the negative cycle of the AC (the + and- are reversed) and current will flow from the + of the battery through the diode- in fact, as soon as the AC terminal voltage drops below +11.4 volts or so and the current will eventually be so high that it will knacker the battery, melt the wires , blow a fuse.
Don't touch mains voltages or big batteries until you can answer this sort of question yourself, without asking anyone. Be safe.

One switch and two relays should work as the yellow line should carry 12 volts when power is off and carry 120 volts when switch on?

John

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• 12 volt To 120 Volt.jpg
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John1397 said:
12 volts DC will travel thru a Diode connected to 120 volt AC , but will it put any load on the battery?

John

John1397 said:
One switch and two relays should work as the yellow line should carry 12 volts when power is off and carry 120 volts when switch on?

John

Wow, crazy dangerous. Thread is closed.

1 person

## 1. What is the difference between 12 Volt DC and 120 Volt AC?

12 Volt DC (direct current) is a type of electrical current that flows in one direction, while 120 Volt AC (alternating current) is a type of electrical current that alternates its direction of flow. DC is typically used for low voltage applications such as batteries, while AC is used for high voltage applications such as household electricity.

## 2. Can I connect a 12 Volt DC device to a 120 Volt AC outlet?

No, it is not safe to connect a 12 Volt DC device directly to a 120 Volt AC outlet. The voltage difference is too high and can cause damage to the device and potentially start a fire. A converter or transformer should be used to safely convert the voltage from AC to DC.

## 3. What is the purpose of connecting 12 Volt DC to 120 Volt AC?

The purpose of connecting 12 Volt DC to 120 Volt AC is to convert the voltage from DC to AC. This is often done for devices that require a higher voltage to operate, such as small appliances or electronics.

## 4. How do I convert 12 Volt DC to 120 Volt AC?

To convert 12 Volt DC to 120 Volt AC, you will need a converter or transformer. These devices can be purchased at most electronics or hardware stores. Be sure to follow the manufacturer's instructions carefully to ensure safe and proper use.

## 5. Are there any safety precautions I should take when connecting 12 Volt DC to 120 Volt AC?

Yes, it is important to follow safety precautions when dealing with electricity. Always use a properly rated converter or transformer, and make sure all connections are secure. It is also recommended to have a qualified electrician inspect the wiring and connections to ensure they meet safety standards. Never attempt to connect 12 Volt DC to 120 Volt AC without proper knowledge and precautions.

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