12v powered 24v dual rail power supply for amp

[Keav]

Hello, i am new here and wasn't able to find what i am searching for in the posts. I would want to know how to make a simple 12v battery powered to 24v-0v-24v power supply. I have some parts at home that came from a old kenwood car amplifier and a couple of arduinos. I am pretty sure that it is possible to make something working out of it.

Here is a video showing a exemple of what a would like to do

YouTube

If someone can give me at least a electronic diagram it would be of good help

 

[JonSnell Electronic]

Search for Buck Convertors.
This will give you the idea. Buck Converters


http://www.ti.com/power-management/...ck-converter-integrated-switch/overview.html#

 

[Keav]

Thank you for your reply but it does not talk in detail about dual rails

 

[FauxFrench]

Hello, i am new here and wasn't able to find what i am searching for in the posts. I would want to know how to make a simple 12v battery powered to 24v-0v-24v power supply. I have some parts at home that came from a old kenwood car amplifier and a couple of arduinos. I am pretty sure that it is possible to make something working out of it.

Here is a video showing a exemple of what a would like to do

YouTube

If someone can give me at least a electronic diagram it would be of good help

To transform 12V into +/-24V power requires a switch mode converter design. I get the feeling you are rather new to power supply designs.
Building an SMPS but the simplest Boost and Buck converters is not as simple as making a linear regulator work. Further, the components used in an SMPS are particular and not something you find in a scrapped amplifier or some Arduino's. In particular the choke/transformer needs to be designed well and is nothing found elsewhere.
You find few members here designing their own SMPS and those who do are pretty experienced. My advise, use DIY converters unless you really want to put time into a thorough study of how they work.
Sorry for the negative reply.

 

[t-minik]

I use that thing to get +/-12v from a single 9v and it woks really well :
Aiyima HIFI Low Noise Single Voltage To Positive Negative Power Output Regulated Power Supply For AMP Decoder -in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group

You can only get +/- 18v.
I personally just added some cap multiplier on output.

 

[Elvee]

You can have a look at this:
Boostor, an ideal companion for a Circlophone on the move
Certainly not cutting-edge technology, but plain and effective if you can content yourself with unregulated rails, and an efficiency that was excellent by the 20th century standards....

 

[kodabmx]

Something like this? Negative Voltage Dual DC12V -12V Power Supply Module 5-12V to +-12V For Amplifier | eBay

EDIT: I just saw that you need +-24V. This does +-12V. I'll leave it here in case it helps someone else.

 

[FauxFrench]

As DIY-modules they exist:
20W + 5V 6V 9V 10V 12V 15V 24V Positive & Negative Dual Output Power Supply DC DC Step up Boost Buck Converter module-in Inverters & Converters from Home Improvement on Aliexpress.com | Alibaba Group
+ 5V 6V 9V 12V 15V 24V Positive & Negative Dual Output power supply DC DC Step up Boost Converter module-in Inverters & Converters from Home Improvement on Aliexpress.com | Alibaba Group
Aiyima For Amplifier Audio Speaker Power Supply Board DC12V/24V To Dual 15V Converter Board DC Dual DC Transformer Board-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
If you really want to construct it yourself, start studying "flyback" converters with bifilar wound double secondary winding and the datasheets for flyback ICs.

 

[gman76]

I’m planning to build a supply based on the LTC1871 (see pg 32 of the datasheet) that is powered from a 12v wall transformer. The circuit shows +/-12v out but I simulated the circuit and it’s good up to +/-40v. It supports 400mA loads.