It does not need an isolated power supply. UL would not be happy about that.
Gerald From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On Behalf Of William A. Mills Sent: Monday, September 4, 2017 5:56 AM To: beagleboard <beagleboard@googlegroups.com> Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update? OK, I know I am asking lots of questions. Sorry but ... Does the X15 RevC need an **isolated** power supply? If not, did any rev? ---- The TI GPEVM says that you need an "isolated" power supply. [1] I don't see any such statement on the X15 wiki or UG. [2] I bought the power supply recommended by the Digikey website which is VEC65US12. This is one of the recommendations of the eLInux x15 wiki page. With the power supply disconnected, I measure continuity from the AC ground plug to the outside barrel of the 12V connector. To me this means it is not isolated. Is my definition of isolated correct? [1] http://processors.wiki.ti.com/index.php/AM572x_GP_EVM_Hardware_Setup [2] http://elinux.org/Beagleboard:BeagleBoard-X15 ---- I would be happy to update the eLinux wiki with your answers to these questions if I am allowed. On Sun, Sep 3, 2017 at 7:27 PM, Gerald Coley <gcol...@emprodesign.com<mailto:gcol...@emprodesign.com>> wrote: The market picks it. We typically use what we can buy. It can change from one production build to the next. This happens all the time on the Hardware world. That is why the SW has to be ready to handle all of them. Gerald From: beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com> [mailto:beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com>] On Behalf Of William A. Mills Sent: Sunday, September 3, 2017 3:32 PM To: beagleboard <beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com>> Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update? Thanks Gerald. I did find the change sheet after a bit. When you have alternatives like the Kingston vs Micron for eMMC and DDR parts, who picks which one is used? The manufacturer (PTI)? Can it change from one production run to another? Or do you dictate when that happens and potentially give it a new RevC3 etc? Thanks, Bill On Sun, Sep 3, 2017 at 2:00 PM, Gerald Coley <gcol...@emprodesign.com<mailto:gcol...@emprodesign.com>> wrote: The BOM has a revision page with the changes for each revision. We addd some new par tnumbers for some alternate sources due to some obsolete parts a while back. But that was it. Nothing in the design itself changed. From: beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com> [mailto:beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com>] On Behalf Of William A. Mills Sent: Sunday, September 3, 2017 12:11 PM To: beagleboard <beagleboard@googlegroups.com<mailto:beagleboard@googlegroups.com>> Subject: Re: [beagleboard] BB-X15 Rev C Schematics & ewiki update? Gerald, Thanks. If that is all it is, then no hurry on the Rev C schematics. Jason can just put a note on the wiki &| the github files stating as much. I am currently trying to diff the BOMs. diff is useless so it looks like I will have to write a script. Thanks, Bill -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com<mailto:beagleboard+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CACgK%2BxnCg6ZCbzWwEs1pL6j8Nq599skMx6FVdiv9y%3Dg5YszVQQ%40mail.gmail.com<https://groups.google.com/d/msgid/beagleboard/CACgK%2BxnCg6ZCbzWwEs1pL6j8Nq599skMx6FVdiv9y%3Dg5YszVQQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. 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