Also, it has been EONS since I've seen a netcom.com address. That's cool :).
On Fri, Feb 15, 2019 at 2:54 AM Dan Hammans <dan.hamm...@gmail.com> wrote: > You guys are great. I'm going out of town for the weekend so I've ordered > a couple of the parts suggested to give it a try. Should be here when I get > back. > > Thanks! > > Dan > > On Thu, Feb 14, 2019 at 1:20 PM Mala Dies <fun...@gmail.com> wrote: > >> Hello, >> >> While reviewing this info. you provided, an optocoupler might just work. >> I found a site that sells them but I also found on that site, some >> datasheet. See here for the datasheet: >> https://www.analog.com/media/en/technical-documentation/data-sheets/ADuM1200_1201.pdf >> . >> >> Seth >> >> P.S. I have not tried this conversion yet so my mind would say take time. >> Do not rush if possible. Oh and from what I understand, the optocoupler >> works by shutting off instead of transferring the signal any further. The >> DigiKey site has some and I found one that is unidirectional: >> https://www.digikey.com/product-detail/en/analog-devices-inc/ADUM1201AR/ADUM1201AR-ND/725709&?gclid=CjwKCAiAwJTjBRBhEiwA56V7q0A4N0DBiSwt5Wm4ahl6pdiosiiP-YLgdJr-Y9oH2wYF3XcMOvw7FBoCLmoQAvD_BwE. >> That datasheet above is the sheet for this link. >> >> On Wednesday, February 13, 2019 at 8:57:09 PM UTC-6, Dan Hammans wrote: >>> >>> I'm kind of at a standstill. I found a circuit design to use a >>> transistor to take a 3.3v input, and switch on the 5v for the GPS but then >>> while doing more reading someone said that was a really bad idea because >>> they weren't opto-isolated. I didn't really know what that was, but after >>> reading it makes a little more sense. If the transistor fails or is >>> otherwise damaged, it could end up feeding 5v into the 3.3v section of the >>> Beagleboard and fry it. >>> >>> I was looking for an opto-isolated transistor relay, found one but >>> haven't gotten one ordered yet to try it out. >>> >>> That's pretty much the status, I was going to try and talk to an >>> electrical engineer friend of mine to see what he thought of the situation. >>> What do you think? >>> >>> Thanks, >>> Dan >>> >>> On Wed, Feb 13, 2019 at 8:17 PM Mala Dies <fun...@gmail.com> wrote: >>> >>>> Hey Man, >>>> >>>> Seth here. Did you ever figure out the issue w/ setting up a GPIO pin >>>> to control the 5v for your GPS? >>>> >>>> Seth >>>> >>>> On Sunday, February 10, 2019 at 12:38:52 AM UTC-6, Dan Hammans wrote: >>>>> >>>>> No apologies needed, I'm just trying to figure this out. What I meant >>>>> was using a GPIO pin to trigger the relay/transistor which would then >>>>> switch on +5v. >>>>> >>>>> I'll take a look at the links above, appreciate your help! >>>>> >>>>> On Saturday, February 9, 2019 at 11:58:08 PM UTC-6, Mala Dies wrote: >>>>>> >>>>>> Sir, >>>>>> >>>>>> I just found a source for ideas: >>>>>> https://next-hack.com/index.php/2017/09/15/how-to-interface-a-5v-output-to-a-3-3v-input/. >>>>>> Adding a button and software could prove valuable. If anything, it may >>>>>> help >>>>>> a bit. >>>>>> >>>>>> Seth >>>>>> >>>>>> P.S. GPIO works for buttons, LEDs, and other circuitry. I am sure you >>>>>> know how to do things. I was trying to latch on to learn more. Sorry. >>>>>> >>>>>> On Saturday, February 9, 2019 at 11:19:47 PM UTC-6, Dan Hammans wrote: >>>>>>> >>>>>>> Hi Seth, I really appreciate the reply. >>>>>>> >>>>>>> I was afraid of that. My GPS module requires +5v. Is there another >>>>>>> +5v source on the board that is switched off when the board powers down? >>>>>>> What about the black power connector above the GPS UART port? >>>>>>> >>>>>>> Otherwise it looks like I will be building a resistor circuit and >>>>>>> triggering it from a GPIO pin. >>>>>>> >>>>>>> On Saturday, February 9, 2019 at 11:07:14 PM UTC-6, Mala Dies wrote: >>>>>>>> >>>>>>>> Sir, >>>>>>>> >>>>>>>> Seth here. I just got done dealing w/ someone on this subject. The >>>>>>>> 5v pin from the GPS connection cannot be "un"powered. It stays powered >>>>>>>> on >>>>>>>> while the board has power. >>>>>>>> >>>>>>>> Seth >>>>>>>> >>>>>>>> P.S. Try UART instead at 3.3v. This may help. >>>>>>>> >>>>>>>> On Saturday, February 9, 2019 at 2:58:12 AM UTC-6, Dan Hammans >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> I'm not sure that I understand the difference between the >>>>>>>>> Beagleboard forum and the Beaglebone forum, but thought I would try >>>>>>>>> posting >>>>>>>>> here as well. >>>>>>>>> >>>>>>>>> I have a Beaglebone Blue connected to a GPS module via the GPS >>>>>>>>> micro JST connector. I selected this one because it has +5v, which is >>>>>>>>> what >>>>>>>>> is needed for my GPS as opposed to 3.3v on the other UARTs. >>>>>>>>> >>>>>>>>> The GPS module works correctly, but my issue is I can't power it >>>>>>>>> down. It's been suggested that the 5v rail can't be shut down with the >>>>>>>>> battery connected, but that seems rather odd to me. The also suggested >>>>>>>>> solution was to use a transistor to switch 5v power via a 3.3v GPIO >>>>>>>>> pin. I >>>>>>>>> suppose that's a solution but not a very elegant one if the board can >>>>>>>>> be >>>>>>>>> somehow configured to power off the 5v rail. It seems like this >>>>>>>>> should be >>>>>>>>> possible, albiet not easily accessible. There doesn't seem to be >>>>>>>>> much/any >>>>>>>>> documentation available about this at all. >>>>>>>>> >>>>>>>>> I made a Youtube video showing what's going on; >>>>>>>>> https://www.youtube.com/watch?v=9xrXKRy97Yk >>>>>>>>> >>>>>>>>> Any suggestions appreciated, otherwise I think I'm going to have >>>>>>>>> to go down the path of the transistor relay... >>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>> 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...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/a081d618-f75a-4343-9fb1-501aec0421a8%40googlegroups.com >>>> <https://groups.google.com/d/msgid/beagleboard/a081d618-f75a-4343-9fb1-501aec0421a8%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >> 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. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/9d44d98c-b736-4706-9c9d-2bb917096bf6%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/9d44d98c-b736-4706-9c9d-2bb917096bf6%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAHabsPQW2vDUB9%2BvUWf0MFWeUApv3oyAdnM6LvAstbQMoZEJjw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
