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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/a081d618-f75a-4343-9fb1-501aec0421a8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
