Jump to content

Recommended Posts

This is going to start out as just being copied directly over  from my thread on BitBuilt about the project.

Please login or register to see this link.

The xbox has some mildly odd power requirements. It uses the same 20 pin Molex MiniFit Jr connector that an ATX PSU output, however the pinout is completely different.
image.png.6d289d30fe3e6334739bcfbb0ffc4cff.png

As it stands, the typical solution is to use a PicoPSU, a small ATX PSU, a modify it to work with the original xbox.  PicoPSUs can be had for around $15, the power supplies for them can be had for around $10.  It's a very inexpensive solution.  Traditionally when this is done, the Power OK and Power On lines are ignored, the PSU is set to always on, and the wires are run all catywumpus to get to where they need to go.  While this solution works, it's definitely a hack, and I believe we can do better.

 

So what are the xbox's actual power requirements?

While I haven't actually cut up a power supply and tried to get the xbox to full load while measuring the current draw, I have a V1.1 PSU here that handily has the power requirements right on the label.

Max Output Power: 96W

DC Output:

+5V -- 13.2A

+3.3V -- 4.8A

+12V --1.2A

+3VSB -- 0.045A

I hope it's safe to assume that further revisions of the xbox had similar or lower power draw.  Regardless, this seems like a good starting point.

 

So, how do I plan to accomplish this?

With 4x LM2678 Regulators from Texas Instruments.

Please login or register to see this link.

Why 4 regulators for 3 voltages?

The LM2678 is a 5A regulator. I need 13.2A on the 5V line.  Having looked at the specs for the PicoPSUs that seem to work just fine, they're rated for 8A on the 5V line. This leads me to believe that 10A should suffice, so I'll need two regulators for 5V.

I'll also need a 12V regulator, as I plan to run this off of an easily obtainable laptop power supply rather than needing to source an 8A 12V supply.

I will also be designing a smaller footprint alternative that runs off of 12v for when space is of the highest concern.  I'll likely also break down the xbox's power requirements even further at some point to see if I can't design a PSU that allows for aggressive trimming, but that's much further down the road.
--------------------------------------------
image.png.5ad032363be971425ebc2dd38ef328fa.png
I've designed the first iteration of the 24v board, it's 60*32mm. Now that it's done, I don't like it for a variety of reasons. I'm going to try again, putting the low profile components on the backside of the board and the tall components on the topside of it. Maybe I'll be able to squish it down a bit more in the process.
--------------------------------------------

image.png.50f0cee6f3783ae35991538d20b3667f.png

There, that's a little better.
27.5*49.25 mm
--------------------------------------------

Oh, hey, I worked on this a bit.
I ditched the 12v regulator and changed it to 12v in. I also had to source different inductors, which are sadly larger, so the whole board got a couple of mm wider in the process.
image.png.c5b2784d85afbc13adba612a483e6a98.png

26.5mm*57.2mm

I think I'm gonna actually order this one, and see if it works.

--------------------------------------------

I've since looked at the most recent revision and noticed a couple of flaws in it. I've repaired those flaws, and I'm gonna sleep on it again, look at it with fresh eyes tomorrow, and probably order it.

Edited by ttsgeb
  • Like 2

Share this post


Link to post
Share on other sites

Interesting project, I'm using a pico psu (160XT) with atx to xbox adapter and due to the low amperage on the 5v line the xbox struggles to initially boot as there are a lot of capacitors that need charging. I resolved this slightly by removing 3 of the start up capacitors on a v1.0 xbox and while it works I'd prefer a much more professional and reliable solution 

Share this post


Link to post
Share on other sites
6 hours ago, ShinGoutetsu said:

Interesting project, I'm using a pico psu (160XT) with atx to xbox adapter and due to the low amperage on the 5v line the xbox struggles to initially boot as there are a lot of capacitors that need charging. I resolved this slightly by removing 3 of the start up capacitors on a v1.0 xbox and while it works I'd prefer a much more professional and reliable solution 

2 options

Use a bigger Pico (300watt) PSU or use a version 1.6 Xbox fitted with a 2.5 inch HDD using the 160XT

 

Cheers

SS Dave


Soft modding is like masturbating, It gets the job done but it's nothing like the real thing.

Share this post


Link to post
Share on other sites

Unfortunately size wise the higher wattage pico psu's are too big for my xbox mini so I'm currently limited to the 160XT. I am using a 2.5" hdd already, as I said it works it's just not as perfect as I would like. The board I am using has 128mb ram so I'd rather use that than a v1.6 board

Share this post


Link to post
Share on other sites

Well, you said "Professional" and while that certainly doesn't describe me, it made me reconsider the hack that probably wouldn't work that I was going to try to get this working, so I went back to the drawing board and started over.  Instead of trying to put two switching regulators in parallel for the 5v line, I'm going the proper route and designing it with a controller and mosfets per the suggestion of TI's WEBENCH Power Designer application.  I'm still going to have to do some tweaking to make their suggested circuit into something I can reasonably hope to assemble, however.  As an added benefit, my new 5v circuit will definitely support the power requirements of the xbox, and won't be prone to the same issues that the 160xt apparently has.

  • Like 1

Share this post


Link to post
Share on other sites

Please login or register to see this attachment.

I've gotten the new schematic thrown together, next up is assigning footprints to everything and laying out the board.
I'm definitely considering a PCB assembly service for this one, that's something like 35 components, most of them 0603, and I really don't want to have to put it together.

Share this post


Link to post
Share on other sites

That reminds me of the version 1.6 PSU.

You really should assemble the 1st/prototype yourself that way if there is a problem you can sort it out.

 

Cheers

SS Dave


Soft modding is like masturbating, It gets the job done but it's nothing like the real thing.

 

Share this post


Link to post
Share on other sites

The difference between this and the 1.6 PSU is that this is, so far, smaller than a thumb drive.
I've gotten the 5v circuit laid out now.
Please login or register to see this attachment.
11mm*40mm
The 3v3 and 12v circuits are going on the backside, the power jack on the left and the outputs on the right.  Should come out to something like 12*60mm, or 1/2"*2 1/4".

  • Like 2

Share this post


Link to post
Share on other sites

I was going to update the post, but apparently we're only allowed to edit for a few minutes.
Please login or register to see this attachment.
I've gotten the whole circuit laid out now. We're once again at the "Sleep on it" stage where I take a nap and then decide how I feel before ordering anything.
20.5mm*56.5mm, or slightly smaller than the fan cutout in the motherboard.

Edited by ttsgeb
  • Like 1

Share this post


Link to post
Share on other sites

Well, I just ordered everything I need for the first build. $76. I really hope this works.

Future boards will be under $30/each if this design works out, but that's with me assembling them, so there's quite a bit of time involved there.

If it works, I plan to open source it so that anyone that's feeling daring enough can make their own. I'll probably also offer a few for sale, but they won't be cheap. I'm expecting to charge around $100, but ultimately it depends on what I can get them made for.

  • Like 2

Share this post


Link to post
Share on other sites

Sounds good and I am sure that they will sell.  

 

Cheers

SS Dave


Soft modding is like masturbating, It gets the job done but it's nothing like the real thing.

Share this post


Link to post
Share on other sites

Boards came in today
IMG_20200605_080552.jpg?width=974&height=1298
IMG_20200605_095201.jpg?width=974&height=1298
Assembled and tested, the 3v3 line works as expected, but the 5v line doesn't work at all. I'm assuming it's due to a poorly aligned chip that I didn't notice until after I plugged it in. I re-aligned the chip and the problem got worse. I'm pretty sure that chip is fried.
I also ran into a problem with the power jack, apparently either I read the datasheet wrong, or the datasheet was wrong.  Either way, I had to solder a pigtail jack on to get power to the board.

Share this post


Link to post
Share on other sites
4 hours ago, ttsgeb said:

Boards came in today
Please login or register to see this link.
Please login or register to see this link.
Assembled and tested, the 3v3 line works as expected, but the 5v line doesn't work at all. I'm assuming it's due to a poorly aligned chip that I didn't notice until after I plugged it in. I re-aligned the chip and the problem got worse. I'm pretty sure that chip is fried.
I also ran into a problem with the power jack, apparently either I read the datasheet wrong, or the datasheet was wrong.  Either way, I had to solder a pigtail jack on to get power to the board.

That sucks. Hopefully it is just a fried chip, and not a board issue. But I guess that's part of the whole process of designing a board like that.

When all is said and done, what will you call the first released board revision?

Share this post


Link to post
Share on other sites

Idk. Bob has a nice ring to it.

I'll be ordering a replacement chip and a components kit to build a second one tonight. Hopefully this time next week, I'll have a working board.

Share this post


Link to post
Share on other sites
1 hour ago, ttsgeb said:

Idk. Bob has a nice ring to it.

I'll be ordering a replacement chip and a components kit to build a second one tonight. Hopefully this time next week, I'll have a working board.

I like that idea. First revision "Rev Bob". Definitely something that would be memorable.

I look forward to the update for the next attempt.

Share this post


Link to post
Share on other sites
On 6/5/2020 at 7:58 PM, ttsgeb said:

I'll be ordering a replacement chip and a components kit to build a second one tonight. Hopefully this time next week, I'll have a working board.

Any luck with the new parts?

Share this post


Link to post
Share on other sites

No luck with the new part, I'm going to try just building the 5v circuit on the second board and see how that turns out, but I'm not holding my breath.  I just wish I could track down what I've done wrong.

Share this post


Link to post
Share on other sites

What is the 5 volt doing ?

 

Cheers

SS Dave


Soft modding is like masturbating, It gets the job done but it's nothing like the real thing.

 

Share this post


Link to post
Share on other sites

Have you tried powering it up with a load on the 5 volt?

 

Cheers

SS Dave


Soft modding is like masturbating, It gets the job done but it's nothing like the real thing.

Share this post


Link to post
Share on other sites

The datasheet said nothing about no-load shutoff, and I didn't build that into the circuit, but I gave it a try anyway.
No change. I'm still seeing nothing from the 5v and perfect behavior from 3v3. I'll make sure to have a load connected on my second build before powering it up, though.

Share this post


Link to post
Share on other sites
7 minutes ago, ttsgeb said:

The datasheet said nothing about no-load shutoff, and I didn't build that into the circuit, but I gave it a try anyway.
No change. I'm still seeing nothing from the 5v and perfect behavior from 3v3. I'll make sure to have a load connected on my second build before powering it up, though.

What part did you use for the 5v circuit?

Share this post


Link to post
Share on other sites
31 minutes ago, ttsgeb said:

The datasheet said nothing about no-load shutoff, and I didn't build that into the circuit, but I gave it a try anyway.
No change. I'm still seeing nothing from the 5v and perfect behavior from 3v3. I'll make sure to have a load connected on my second build before powering it up, though.

Do you have an oscilloscope available to you so that you can see what the 5v line looks like?

Share this post


Link to post
Share on other sites

I have one of these kicking about somewhere that I can track down tonight and try to get a scan of what's going on, but I suspect it'll be more of nothing.
Please login or register to see this link.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By slashguns04
      Hello
      i have all the xbox iso classes of 7,641.760gb
      I tried to extract them with quix and c-xbox tool but it does not extract them, I can extract the iso only with the xbox image browser, but it does extract one at a time, is there any program that extracts multiple iso at the same time? thank you
    • By ProggerPete
      I bought a new OLED65B9PTA tv but am having issues connecting the XBOX to it.  I can hear audio but don't see any video.
      The tv has a 3.5mm socket labeled 'AV1' and an adapter cable that goes from white/red/yellow TCA sockets to a 3.5mm plug and that's what I've connected to.
      When digging for info I found Please login or register to see this link.  which says 'Unlike many of Samsung's sets, this one actually has an analog video input for legacy (non-HDMI) devices, although it no longer supports analog component video.'
      I'm not very clued up on exactly what the different outputs are.  Is the xbox output analog component video and that's why I'm not seeing anything?
      I double checked plugging into my old TV and the XBox itself definitely still works.
      I'll appreciate any tips you might have.
      Cheers,
      Pete
       
    • By N163LPH03N1X
      Hey Guys,

      I got a list of stuff Odd and Ends here that needs to go.
      Xbox, Dreamcast, GameCube stuff.

      I only have a limited supply of it.
      Once its gone its gone for good.

      I accept PayPal, please direct message me if you want to buy something
      and ill give you a shipping rate based on your address, super easy.
       
      Used Debug Shelled, upgraded 128mb Ram v1.0 Xbox -$350CAD


      Original Xbox Debug Kit Shell. Motherboard Rev. 1.0. 128mb ram upgraded board (Not Original Debug Board). Delta 1.0 NTSC PSU. TSOP Ind-Bios. Thompson DVD drive. 8gb stock hard drive. Software Details: Original Microsoft Dashboard Commentary: Missing its original Debug hardware (but can be converted with the right knowledge with current parts) The Motherboard used in this console is in immaculate condition. Clock cap was removed and CPU caps replaced. Original 1.0 fan heat sink was removed and replaced with a 1.1/1.6 heat sink. CPU and GPU was re-pasted. Some scrapes to the bottom of the shell and small scratches and one  small stress crack on top shell. Rubber Feet Missing. [Added my own custom rubber feet]. Shielding Intact.
      New IcedCube Gamecube Shell, Metallic Blue -$300CAD


      Details: Full GameCube Shell Replacement Never been mounted or used. Brand New In-Box Condition (other than taking it out for Photos). Hard to Find IcedCube Shells. Comes with all Stickers and parts. Perfect Combo with Qoob Pro or Viper. New/Opened SEGA DreamCast GDEMU Pro v5.56 [Black] + SD Extender -$80CAD

       
      GDEMU PRO Optical Drive Simulation Board for SEGA Dreamcast DC VA1 SD Extension
      GDEMU is a SD card based replacement for the optical drive in Dreamcast console. GD-ROM / CD-ROM drives inevitably wear out and fail – as do all mechanical devices – and since the console is no longer being manufactured it’s nearly impossible to source spare parts. This project was meant to provide a “once and for all” solution, since it doesn’t have any moving parts. 
      Features
      Replace your faulty GDROM Drive with a Solid State Optical Drive Emulation Board.
      Easy to install, the original optical drive seat can be removed and replaced with GDEMU, no welding, no modification to the machine board.
      Only suitable for VA1 motherboard DC Game machine, otherwise will damage GDEMU and do not plug in or pull with electricity
      100% compatible with game, perfect running original GDI image, and compatible with CDI image.
      Note: please don't upgrade the firmware, it is the latest firmware version, and it will be permanently bricked if you upgrade the firmware.
      Package Contents
      1 x GDEMU PRO Optical Drive Board
      1 x SD Card Extension Cable
      New Sick Mods Xerc CME Bundle [OG Xbox] -$60CAD


      Quanity Left: 2
      Install Tutorial: 
      Please login or register to see this link.
      Installation Video: 
      Please login or register to see this link.
      Preview Video: 
      Please login or register to see this link.
      Features
      Power Console On and Off via Xbox remote.
      Eject or close DVD tray on the fly with remote.
      Audio LED pulsation, LED's pulse to the sound of your Xbox.
      Remote configuration, setup and configure the buttons the way you want.
      LED chaser Mode, toggle through modes changes the LED chase patterns with remote.
      Speed up or Slow down led sequence.
      SmartXX OS boot Support
      Connects to MS DVD Dongle internally for menu browsing with remote (Perfect for XBMC media)
      N64 Freaks Xerc 2XE  [OG Xbox] Used - $20CAD/ New -$25CAD


      New Quantity 3 Left
      Used Quantity: 4 Left
      The XERC 2 XE is a small device which allows you to turn your Xbox on and off with your remote control. You can also eject and emulate long and short power presses.
      The XERC can be configured to work with many different remotes, and you can change the button setup at any time without opening your Xbox. It also includes a bonus LED Fader feature on the status light. The IR Receiver is included.
      Features
           Pulse fading Xbox Eject/PowerLED
      Power Console On and Off via Xbox remote.
      Eject or close DVD tray on the fly with remote.
      Remote configuration, setup and configure the buttons the way you want.
      SmartXX OS boot Support
      Connects to MS DVD Dongle internally for menu browsing with remote (Perfect for XBMC media)
      New PulseVU 2X  [OG Xbox] - $25CAD

      Quantity: 2 Left
      This device pulses any LEDs you connect to it with the beat of the music coming from your console. It can also has all the features of the SICKmods Fader and works on the original "Fat" Xbox360's Ring-of-Light. This device works with up to 150+ LEDs.

      17 different modes allow you to set your LEDs to the VU mode, fader, dim, solid on, off, or any combination of those. Change modes easily by using an existing button on your console, rather than opening your console each time or installing another switch. A Quick Disable feature lets you quickly turn off your LEDs and then quickly turn them back on at a later time.
      This works best on 1.6 revision Xbox motherboards due to their standby power always being active.
       
      Face Plate LED Bars [OG Xbox]Colors: [Blue Black Green] - $10CAD

       
      Blue quantity: 11
      Black quantity: 8
      Green quantity: 10
      This device is used inside the OG Xbox's front face plate to allow under glow in front of the Xbox.
      Soldering is required to install up to 11 LEDs per bar with Resistors in Series or Parallel.
      Bars will need to be rigged up to a 5V source coming from the Xbox.
      Two Bars = 1 Set/1 Xbox for $10 CAD. Comes in Blue Black or Green PCBs.
      2TB SATA Hard Drive [OG Xbox] Lineberry Build - $250

      2 Terrabyte filled Xbox Hard Drive Ready to go into an Original Xbox with a IDE to SATA adapter
      [Not Included] Xbox drive Includes a full library of Xbox Games, Homebrew, Emulators & roms,
      Dynamically setup by LineBerry XBMC4Gamers Dashboard.
      Note: Drive is Unlocked and will need a modchip or Tsop to use.

      Please Message me for Inquires
      N163LPH03N1X

       

Board Life Status


Board startup date: April 23, 2017 12:45:48
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.