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Found 10 results

  1. This is going to start out as just being copied directly over from my thread on BitBuilt about the project. https://bitbuilt.net/forums/index.php?threads/xboxpsu.3387/ 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. 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. http://www.ti.com/product/LM2678 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. -------------------------------------------- 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. -------------------------------------------- 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. 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.
  2. This is a copy of portions of my thread over at BitBuilt https://bitbuilt.net/forums/index.php?threads/xboxdvi.3304/ As some of you may know, the original xbox is really lacking in video output modes for the modern era. It is only capable of analog video out, and doesn't even support VGA through that. Early versions of the xbox use a CX25871 as the video encoder, which can take a variety of digital inputs and in turn outputs analog video. https://html.alldatasheet.com/html-pdf/153349/CONEXANT/CX25871/384/1/CX25871.html My suspicion is that the xbox uses the highest quality of these potential inputs, RGB24. If that turns out to be the case, I should be able to use the Texas Instruments TFP410 to turn these signals into DVI https://www.ti.com/product/TFP410 End goal is to have a board with a BOM of under $20 that I can then install in my absurd stack of xboxen. The catch: This is my first circuit design project and my first PCB design project, so I'm starting out way over my head. Wish me luck, I guess. -------------------------------------------------- I've since found that my initial assumptions were incorrect, and I've made it to my second prototype. It still has issues, but I'll find out soon enough if I'm on the right track. --------------------------------------------------
  3. After several attempts at an refurbished WD 1TB SATA HDD, Kingwin ADP-06 adapter and 80 wire IDE cable, I threw those all into closet storage and went for the best instead. A brand new Samsung EVO 500GB SSD, Startech adapter and a Rontech 80 wire IDE cable...and an 80mm Noctua. Results are pretty cool to own:
  4. Hey all! I recently completed and posted on a few Facebook groups a little project which I recently finished and one of your members recommend me come here and share it with you all, so here goes! The whole thing started when I decided I wanted to build a PC into an Xbox. I've done a little bit of modding here and there in the past, but nothing to this extent. Sadly I didn't make a build log as I went along, but here is the finished product for you to enjoy! The spec: Intel i5-7400 Processor running at 3.0 GHz Zotac 4GB 1050 Ti Graphics Card 16GB DDR4 Crucial Memory running at 2400 MHz MSi H110i PRO LGA1151 Mini-ITX Motherboard 250GB Samsung NVMe SSD 2TB Seagate Barracude Storage HDD 300w Game Max Power Supply It's got a custom water cooled loop in there too, and boots to Windows desktop in 13 seconds! Enjoy! shoe.
  5. So I’m working on a portable Xbox briefcase thing. I have an arcade switch on the outside of the briefcase to turn on the tv and the Xbox at the same time. The Xbox is deconstructed and laid out like a test bench computer inside the briefcase and I was wondering if I could bypass with a jumper to have the Xbox turn on with power or does it need to be a momentary switch? I appreciate any help
  6. Has anybody encountered this issue before? I transferred the first pgr to my hard drive via ftp and initially it work great however when i reached the second stage races the game hard locks my xbox on the loading screen as the races is loading up ??
  7. Hi is there anyone on here that will help me with a project that has a 3d printer and knows how to make small curcit boards and such pm me if you know how if you help me i have a reward for whoever can $$$
  8. i recently came across a x3cp console locally for a great bargain since then i noticed some ppl trying to source replacements for some of the x3cp pcbs so I thought I might have a squizz and see if i could help the og scene out currently waiting for delivery on the pcbs from jlcpcb but i will release the gerbers here and on the facee page once they are tested and hopefully confirmed working any questions feel free to ask
  9. Well, a few days ago one original xbox fell in my hands, it has lot of problems but I wanted to mod it to the max and so, I found this forum looking for help. Thank you all in advance!
  10. Hey, just seeing if there is anyone here located in/around Cambridge in the UK. I have an original (untouched) XBOX and would like to talk to someone about upgrading it. I know I can have this sent off in the post but don't feel comfortable doing that. I'd be willing to compensate someone for their time spent doing this, and there would be no rush. If it's something that you'd like to do or have any ideas please let me know. I'd be thinking along the lines of: - A good clean - HDD upgrade - Paint job - Hard/Soft/TSOP mod - Anything that could help with video displaying on modern TV - Fan replacement (a quieter one) - Wifi adapter Thanks for reading!

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Board startup date: April 23, 2017 12:45:48
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