# Thread: From 12VDC to 12VAC

1. ## From 12VDC to 12VAC

Hello all,

Im tired of searching my answer on . Simply because I couldn't find any. So here is my question.

Ive tried to make a sound dock from my Computers Speaker installation. Its 2 speakers and 1 sub woofer. I want to connect an 12V Battery to it so I can take the instalation to my gym. The Only problem is that the Battery is 12VDC and the speaker installation works on 12VAC. I need an invertor but I can find any.

Anyone that can help me out with this one?

09

2. Are you sure it operates on 12v dc? Even if it plugs into the wall, if it is a power brick, it usually coverts the 120v ac down to 12v dc. LOok on the brick and read what it says the output is. It will most likely say something like 12vdc.

If so, you only have to cut the wire an connect the loper one to the proper terminal on the battery.

3. Well, first off all Im Dutch. I can understand most of the terms that are being used but not all of them.

The Electricity that comes out off the wall is AC. Ive readed it @ arround 13V. The Electricity that an 12V Battery gives is DC.

But if you are saying that I can cut the cable and connect it to a 12V Battery I could try that.

Maybe some Photos would help?

Thank you for the quick anwser

4. i never in my life seen anything that operates on 12v AC!!!!
do what bugbyte says

5. So you are saying that the electricity that comes out of the wall is AC and gets inverted to DC by the speaker itself?

So I can just go buy and 12V Car/Scooter Battery , Strip the cable and hook it up?

7. The electricity coming out of the wall is 230VAC, so how come you are only measuring 13V???

Answer - it is being converted.
If it is merely a transformer, it might be 12VAC.
If the transformer includes diodes, or its is a transformerless SMPS, then its output is almost certainly DC.

Measure the "13V wall output" on both AC and DC ranges, and swap the test-lead direction for both tests. WARNING - I do not mean test the wall outlet, but the output from whatever power supply you plugged into the wall outlet and measured the "13VAC".

Compare that to the same test on a 12V car battery.
Much difference?

If you load is AC, it's probably better finding its internal DC voltage....
Chances are it will work of a car battery anyhow, though possibly with reduced output.

8. Originally Posted by Jetforce2009
Hello all,

Im tired of searching my answer on . Simply because I couldn't find any. So here is my question.

Ive tried to make a sound dock from my Computers Speaker installation. Its 2 speakers and 1 sub woofer. I want to connect an 12V Battery to it so I can take the instalation to my gym. The Only problem is that the Battery is 12VDC and the speaker installation works on 12VAC. I need an invertor but I can find any.

Anyone that can help me out with this one?

09
okay the reason you wont find anything on google about 12VAC is the fact that nothing runs on 12VAC, as explained you have a "brick" that converts the AC to DC, your speakers more than likely run on 12VDC so my suggestion is cut the wire from the brick, connect the positive terminal of the battery to the wire with the white stripe, the negative to the black one and walla, you have power!

9. Originally Posted by Jetforce2009
Well, first off all Im Dutch. I can understand most of the terms that are being used but not all of them.

The Electricity that comes out off the wall is AC. Ive readed it @ arround 13V. The Electricity that an 12V Battery gives is DC.

But if you are saying that I can cut the cable and connect it to a 12V Battery I could try that.

Maybe some Photos would help?

Thank you for the quick anwser
1. If you live in the Netherlands, it is 230 volts AC from the wall. There is no 12 volts AC. The brick you are plugging in contains a transformer that converts the power to 12vdc.

2. Use a multimeter to measure the power at the end of the wire that plugs into the speakers. That is almost sure to be 12vdc.

3. If so, cut the wire and connect the + to the proper battery terminal and the ground to the proper battery terminal. I NEVER go by the wire color or striping. Always measure t with a digital multimeter to test it, first.

4. There are many tutorials on YouTube that explain how to use a multimeter. It is your best friend!

10. Originally Posted by Bugbyte
1. If you live in the Netherlands, it is 230 volts AC from the wall. There is no 12 volts AC. The brick you are plugging in contains a transformer that converts the power to 12vdc.

2. Use a multimeter to measure the power at the end of the wire that plugs into the speakers. That is almost sure to be 12vdc.

3. If so, cut the wire and connect the + to the proper battery terminal and the ground to the proper battery terminal. I NEVER go by the wire color or striping. Always measure t with a digital multimeter to test it, first.

4. There are many tutorials on YouTube that explain how to use a multimeter. It is your best friend!
very true, good call!

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