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+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5c67ffe0-c40d-464d-81e0-432b7fb4a310%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
