Re: [beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

Hello Again Dan,

Seth here. I am currently working on a Flying BBBlue, too. At least, I 
thought this is what you were working on. I have arducopter on my BBBlue, 
some .service files to boot some specific commands, and I am trying to pair 
a receiver as of now. 

...

If you are not using the BBBlue for flying, sorry for elongating my post. 
But if you are using the BBBlue to fly, we may be able to use each other. 
Who knows? 

Seth

P.S. The only steps I need to take to complete my project is to pair the 
transmitter and receiver and then I need to power my ESCs. I guess I need 
to calibrate the ESCs, too. Anyway, good flying and if you have time when 
you return, shoot a post to let me know about the BBBlue excursion. 

On Friday, February 15, 2019 at 2:55:51 AM UTC-6, Dan Hammans wrote:
>
> 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  > 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 > 
>> 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  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.

Re: [beagleboard] Re: Beaglebone Blue +5v won't shut down

[Dan Hammans]

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  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  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  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 

Re: [beagleboard] Re: Beaglebone Blue +5v won't shut down

[Dan Hammans]

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  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  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
 

Re: [beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

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 > 
> 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...
>>>
>>>
>>> -- 
>> 

Re: [beagleboard] Re: Beaglebone Blue +5v won't shut down

[Dan Hammans]

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  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
> ---
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> 
> .
> For more options, visit https://groups.google.com/d/optout.
>

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For 

[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

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...
>
>
>

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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Dan Hammans]

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...




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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

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...
>>>
>>>
>>>

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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

Hello,

Seth here, again. I know this may seem odd but that is how the board was 
produced. They may make another one at some point. Who knows? For now, a 
button could work. That would take some extra oomph, though. If you want, I 
can try to help on this matter. 

Seth

P.S. If you have any electrical set up you want to share on your idea, I 
can try to alter the schematic or think of another way. 

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...
>>>
>>>
>>>

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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

Hey Mr. Dan,

Seth here. Yep. That 5v only stays on. That black connector is rated at 5v 
and 3.3v. It does not power off either. See here:

[image: Power.JPG]
Seth

P.S. From what this fellow told me, those two connectors are used for power 
but that neither powers down if power is still applied to the board.

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...
>>>
>>>
>>>

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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Dan Hammans]

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...
>>
>>
>>

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[beagleboard] Re: Beaglebone Blue +5v won't shut down

[Mala Dies]

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...
>
>
>

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