Here's a little tutorial video I took a couple of years ago when I ran across an inexpensive PC Server power supply and found it had 53A 12V rails. Many people have done videos on YouTube showing the smaller desktop versions of power supplies and how to use them for powering car audio gear. The benefit to using a server power supply is they are designed for continuous 24/7 use and are built much better than the standard PC power supplies.
That said, this particular power supply, the Delta DPS-1300BB puts out 12.4V and this is NOT enough to keep a 12V battery charged. I have people ask all the time if you can use a battery with this project and unless you are an electrical engineer and know how to use diodes and voltage regulators, I'd say no go on the battery for this project.
Here's what I used for the project:
- Delta DPS-1300BB Server Power Supply - $20-35 on eBay
- 12" Plastic Toolbox from Harbor Freight - $5
- 4GA to 8GA distribution blocks (x2) - $15 from Amazon
- 10-12GA OFC Power Wire - 8ft - $5
- 10-12GA spade connectors - $5
- Optional - 12V digital gauge - $20-80 depending on brand
- Tools required: Crimping tool, wire stripper, soldering iron, solder, drill, bits, Dremel, time and patience
Here is the video showing the process. It is 17 minutes long, sorry, but I wanted to show as many of the steps as possible. Again, this is not a replacement for a high quality Astron / Audio Authority / etc. power supply designed for car audio, but it works great for testing functionality or using small amps or other 12V gear.
Watch on YouTube in 1080P
or embedded below:
|+ YouTube Video|
I'm working on another project with a Dell PowerEdge 6650 server power supply which supplies over 100A and can be modified to adjust to 14V. The RC guys are using these to charge their Lithium batteries. Do a Google search for that power supply and RC Groups and you'll find a lot of info out there.