QuantumOverload
Posts: 4
Joined: Tue Oct 10, 2017 2:00 am

Xbox 360 PSU

Thu Feb 22, 2018 12:16 am

Hello,

I've got a question about using an Xbox 360 PSU as Pi3 PSU.
Some background info why I want to use a 360 PSU to power a Pi3.
I'm planning on working on modifying a faulty Playstation 2 into a gaming station with a Pi3 and RetroPi.
I've got several Xbox 360 PSU's lying about here I've picked up for free.
The plan is to connect a DVD drive and a 500gb HDD to the Pi.
These require a bit more power than the Pi can supply.
The idea is to use the 5v-1A line, from the Xbox 360 PSU, to power the Pi and use the 12v line to power the HDD and DVD drive.
The won't have any other peripherals attached to it besides two USB gamepads via an USB hub,

I've got a step-down converter(12v to 5v) to supply the HDD, and DVD drive, with their own 5v that is separated from the 5v-1A line going to the Pi.
The 12v line has enough Amps to power the HDD and the DVD drive with enough left for the step-down converter.

Now my question would be would it be possible to power the Pi this way or would it be wiser to have a separate power supply, standard micro-usb PSU, for the Pi?

I hope I made some sense here with my background information.

Thank you for reading and any advice is welcome.

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topguy
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Location: Trondheim, Norway

Re: Xbox 360 PSU

Thu Feb 22, 2018 11:44 am

Most power suppiies sold for Pi3 is 2.5A so using a 1A would be pushing your luck.

BlackKnight_UK
Posts: 87
Joined: Mon Jan 02, 2017 10:51 am

Re: Xbox 360 PSU

Thu Feb 22, 2018 11:51 am

topguy wrote:
Thu Feb 22, 2018 11:44 am
Most power suppiies sold for Pi3 is 2.5A so using a 1A would be pushing your luck.
That's what I was thinking, I'm sure somewhere I read that that was the recommended minimum.

fruitoftheloom
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Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: Xbox 360 PSU

Thu Feb 22, 2018 12:23 pm

BlackKnight_UK wrote:
Thu Feb 22, 2018 11:51 am
topguy wrote:
Thu Feb 22, 2018 11:44 am
Most power suppiies sold for Pi3 is 2.5A so using a 1A would be pushing your luck.
That's what I was thinking, I'm sure somewhere I read that that was the recommended minimum.

Why not read the FAQ instead of somewhere ????

https://www.raspberrypi.org/help/faqs/#topPower

https://www.raspberrypi.org/products/ra ... er-supply/
Last edited by fruitoftheloom on Thu Feb 22, 2018 12:49 pm, edited 1 time in total.
Retired disgracefully.....

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rados-dataplicity
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Location: UK
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Re: Xbox 360 PSU

Thu Feb 22, 2018 12:25 pm

Definitely get a separate PSU ;)
I tinker around with Raspberry Pis daily and make sure that people can easily access theirs remotely.

Community outreach @ dataplicity.com

QuantumOverload
Posts: 4
Joined: Tue Oct 10, 2017 2:00 am

Re: Xbox 360 PSU

Thu Feb 22, 2018 1:24 pm

Thank you for the replies.

The power supply specs for the Pi3 are quite handy and made me change my mind about using the 5v-1A line for the Pi3.
There's a main reason why I want to use an Xbox 360 PSU for this project.
I rather not have 3, or 4, power supply inputs in the back of the Playstation 2 casing.

The Xbox 360 PSU has enough Amps on the 12v line to power all the devices, including the Pi3, and can easily be modified to fit the Playstation 2.
Remove the connector but leave the cable strain relief on it, add a molex connector to the wires and connect it to a custom made PCB.
The Xbox360 PSU outputs 12A to 16A on the 12v line, depending on which PSU you have, and that should be more than enough Amps for everything.
I could add a secondary step-down converter on the 12v line that outputs 5v-3A.

Again thank you for the help.

texy
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Re: Xbox 360 PSU

Thu Feb 22, 2018 1:27 pm

What is the rating of 360 PSU 12V line? If there is plenty of spare 'juice', then maybe consider a UBEC, eg
https://www.modmypi.com/raspberry-pi/po ... -converter

Texy
Various male/female 40- and 26-way GPIO header for sale here ( IDEAL FOR YOUR PiZero ):
https://www.raspberrypi.org/forums/viewtopic.php?f=93&t=147682#p971555

QuantumOverload
Posts: 4
Joined: Tue Oct 10, 2017 2:00 am

Re: Xbox 360 PSU

Thu Feb 22, 2018 1:49 pm

texy wrote:
Thu Feb 22, 2018 1:27 pm
What is the rating of 360 PSU 12V line? If there is plenty of spare 'juice', then maybe consider a UBEC, eg
https://www.modmypi.com/raspberry-pi/po ... -converter

Texy
Texy,

Right now all the 360 PSU's I've got a stored in our spare room in a box I don't have easy access to.
I know they are all for the older Xbox 360 models.
I found this article with the specs listed in step 1.
From the top of my head I have the Xeon/Zepher type PSU's here.

https://www.ifixit.com/Teardown/Xbox+36 ... down/19729

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Imperf3kt
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Location: Australia

Re: Xbox 360 PSU

Thu Feb 22, 2018 9:31 pm

Part of me wants to curse you for frankensteining rival brands, part of me says great idea and the rest of me says hooray for recycling.


Anyway, I'm not sure how much processing power RetroPi wants (my install recently was a disaster) but I can confirm the Pi3b WILL run on 1A while gaming. Plug in only a keyboard and mouse or gamepad and it should be fine.

I'd personally aim for 1.5A minimum, but give it a try at least before shelving the idea.

Also, are you absolutely sure your xbox360's output 12v and 5v? My own xbox360 says 18v
55:55:44:44:4C
52:4C:52:42:41

QuantumOverload
Posts: 4
Joined: Tue Oct 10, 2017 2:00 am

Re: Xbox 360 PSU

Thu Feb 22, 2018 11:04 pm

Imperf3kt wrote:
Thu Feb 22, 2018 9:31 pm
Part of me wants to curse you for frankensteining rival brands, part of me says great idea and the rest of me says hooray for recycling.


Anyway, I'm not sure how much processing power RetroPi wants (my install recently was a disaster) but I can confirm the Pi3b WILL run on 1A while gaming. Plug in only a keyboard and mouse or gamepad and it should be fine.

I'd personally aim for 1.5A minimum, but give it a try at least before shelving the idea.

Also, are you absolutely sure your xbox360's output 12v and 5v? My own xbox360 says 18v
I'm pretty sure about the output voltages and somewhat sure about the Amps, but I do need to dig out the box with the PSU's in them so I can take a photo of them.
As it being a Frankenstein I can only say (when it works).
It's alive...ALIVE! :P
If I have the time tomorrow I'll try to find the box with the PSU's in them.

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