# How to Create a Battery-Operated +/- 15 Volt Power Supply for Op Amps?

• nbo10
In summary, a voltage regulator can be used to distribute the appropriate voltage for a battery operated +/- 15 volt power supply. For a 100ma output, a DC-DC converter such as the MT2-1215WI from Digi-Key can be used. This option may be more costly, but it will save time and the datasheet provides instructions on how to connect and use the converter.
nbo10
I need a battery operated +/- 15 volt power supply. I'm going to use it to run a couple op amps. Any help with a circuit? Thanks

You can use a voltage regulator to distribute the appropriate voltage using a power distribution circuit, from your main voltage source.

If you only need 100ma output something like this would do:
http://parts.digikey.com/1/parts/734756-dc-dc-converter-12-15v-mt2-1215wi.html

dc-dc works best.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=590047;keywords=dc-dc%20converter

it cost a little but will save you the time to keep your project moving. Datasheet shows how you can connect things and output and which pins

## 1. What is a +/- 15 volt battery supply?

A +/- 15 volt battery supply is a type of power supply that provides both positive and negative voltages. It typically consists of two separate batteries, one with a positive voltage and one with a negative voltage, that are connected together to create a dual voltage supply.

## 2. What is the purpose of a +/- 15 volt battery supply?

A +/- 15 volt battery supply is commonly used in electronic circuits and devices that require both positive and negative voltages. It is often used in audio equipment, amplifiers, and other sensitive electronic devices.

## 3. How does a +/- 15 volt battery supply work?

The two batteries in a +/- 15 volt battery supply are connected together in series, with the positive terminal of one battery connected to the negative terminal of the other. This creates a voltage difference of 30 volts between the two batteries. By tapping into the middle of this series connection, a voltage of +/- 15 volts can be obtained.

## 4. What are the advantages of using a +/- 15 volt battery supply?

One of the main advantages of using a +/- 15 volt battery supply is its ability to provide both positive and negative voltages in a single unit. This eliminates the need for multiple power supplies and makes it easier to power electronic circuits and devices. Additionally, a battery supply is typically more stable and reliable compared to other types of power supplies.

## 5. How can I ensure the safety of using a +/- 15 volt battery supply?

It is important to follow the manufacturer's instructions and safety precautions when using a +/- 15 volt battery supply. This may include using the correct type and size of batteries, proper connections, and ensuring the supply is not overloaded. It is also important to regularly check the batteries and replace them when needed to prevent any potential hazards.

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