From alexander.chemeris at gmail.com Thu Sep 29 22:06:09 2011 From: alexander.chemeris at gmail.com (Alexander Chemeris) Date: Fri, 30 Sep 2011 02:06:09 +0400 Subject: UmTRX aka OpenBTS HW update Message-ID: Hi Jean-Samuel, Harald, Holger, I've been quite for a while, so I want to make an update about the state of our hardware. On the FPGA development side we've been stuck for ~3 weeks, because somethings happened with the power controller on our Xilinx SP-605 board and we've been waiting for TI's USB-TO-GPIO to flash this controller. And now we're still dealing with this problem. On the hardware side things are much better. We have "Release Candidate" of schematics and working on PCB layout. We estimate that layout will be finished in a week if we don't decide to change something too much. In attachment you could find the latest versions of schematics in PDF and Altium Designer formats, 3D view (pre-alpha version), list of FPGA I/O and BOM. I would very much appreciate any comments, questions, concerns and ideas about schematics, controls placement, debug facilities, etc. It's much, much better to find bugs and satisfy all requests now, then when we get PCBs printed. Following the idea of Jean-Samuel we're trying to fit the PCB into 5.25" form-factor to be able to use various standard enclosures and even mount the board into a standard PC cases instead of a CD-ROM drive :) Right now estimated board size is 135?170mm, which perfectly fits into 5.25" case. Meantime I've created Google Code project to host our development: http://code.google.com/p/umtrx/ It's empty yet, I plan to gradually fill it with information. I'm happy to grant member rights for the project to any of you who is willing to contribute to descriptions, code (not there yet), etc. Just drop me an e-mail when you feel you need those rights. -- Regards, Alexander Chemeris. -------------- next part -------------- A non-text attachment was scrubbed... Name: UmTRXv1g.zip Type: application/zip Size: 708308 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: UmTRXv1g.pdf Type: application/pdf Size: 3284449 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 3D.jpg Type: image/jpeg Size: 94006 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 3D_annotated.jpg Type: image/jpeg Size: 105339 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 3D_zoom.jpg Type: image/jpeg Size: 145236 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FPGA IO(3).xls Type: application/vnd.ms-excel Size: 9216 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FreeGSM_BOMv1r.xls Type: application/vnd.ms-excel Size: 43008 bytes Desc: not available URL: