Re: [beagleboard] Power - shutdown

> I think what I am leaning on doing is providing 5V directly to the VDD_5V > connector with a diode fused battery+external power through a controllable > regulator, and then using a tiny micro (most likely a PIC) to monitor power > loss and then trigger an interrupt on a pin to cause the

Re: [beagleboard] Power - shutdown

just use the bbb battery connector. it works fine then use a small micro for the watchdog/power monitoring my hardware does this and then after a power down cuts the battery with proper timing the bbb can stay up for ever On 5/3/2016 4:54 AM, Yiannis Papelis wrote: > Fair enough. > > I think what

Re: [beagleboard] Power - shutdown

Fair enough. I think what I am leaning on doing is providing 5V directly to the VDD_5V connector with a diode fused battery+external power through a controllable regulator, and then using a tiny micro (most likely a PIC) to monitor power loss and then trigger an interrupt on a pin to cause the

Re: [beagleboard] Power - shutdown

> > *Everyone keeps using the same sentence "you're asking for trouble" but > without any more details on why that is the case. I get the file system > corruption issue, just wanting to make sure there isn't anything else.* > I think Gerald already stated this, but I think it's worth repeating.

Re: [beagleboard] Power - shutdown

> > *Very much agree with you - even though I don't want to use a battery, it > seems more and more than a battery is a necessity for field use of the BBB, > which would explain the existing connector.* > Having a battery still does not solve two other problems. - Does not solve situations

Re: [beagleboard] Power - shutdown

On Mon, May 2, 2016 at 6:19 PM, William Hermans wrote: > Robert has had 1 or more Beagleboard's running a read only file system > since . . . What Robert ? 2011 ? But you can search this group, and find > him talking about them in a few different posts. > If you install an

Re: [beagleboard] Power - shutdown

Robert has had 1 or more Beagleboard's running a read only file system since . . . What Robert ? 2011 ? But you can search this group, and find him talking about them in a few different posts. On Mon, May 2, 2016 at 12:09 PM, Yiannis Papelis wrote: > Mike, > > Thanks for the

Re: [beagleboard] Power - shutdown

> > *As someone already posted, this is a bit more complicated than that, but > I get the idea.* > I did not see anyone other than you, I, and Gerald post on your discussion here. But I do not get every post to this group.. But, sure . . . it is not as simple as that because while the board is

Re: [beagleboard] Power - shutdown

Mike, Thanks for the suggestion, this seems like a viable alternative. On Monday, May 2, 2016 at 3:02:57 PM UTC-4, mjc wrote: > > On 05/02/2016 02:54 PM, Yiannis Papelis wrote: > > Very much agree with you - even though I don't want to use a battery, it > > seems more and more than a battery

Re: [beagleboard] Power - shutdown

On 05/02/2016 02:54 PM, Yiannis Papelis wrote: Very much agree with you - even though I don't want to use a battery, it seems more and more than a battery is a necessity for field use of the BBB, which would explain the existing connector. In my work, the solution was to use a read-only

Re: [beagleboard] Power - shutdown

As someone already posted, this is a bit more complicated than that, but I get the idea. On Monday, May 2, 2016 at 2:09:44 PM UTC-4, William Hermans wrote: > > *Use a super capacitor.* >> > > Ok, a little abstract . . . > > Use a super capacitor, and if using a console image . . . sudo apt-get

Re: [beagleboard] Power - shutdown

William, Thank you for following up - I appreciate the responses. On Monday, May 2, 2016 at 1:47:45 PM UTC-4, William Hermans wrote: > > *I have been building embedded systems for a while now and I am >> considering using the beaglebone (BBB) for an upcoming project, but I am >> confused by

Re: [beagleboard] Power - shutdown

Very much agree with you - even though I don't want to use a battery, it seems more and more than a battery is a necessity for field use of the BBB, which would explain the existing connector. On Monday, May 2, 2016 at 2:29:18 PM UTC-4, john3909 wrote: > > You cannot just use a supercap. You

Re: [beagleboard] Power - shutdown

Gerald, Thanks for following up - do you mean that if I don't have anything writing to the file system, I can simply yank the power? I naturally have seen the expansion header usage you listed in your response, is there something specific I should be looking at? On Monday, May 2, 2016 at

Re: [beagleboard] Power - shutdown

You cannot just use a supercap. You have to use a boost switching regulator to keep the voltage on the processor constant while the supercap discharges. This is a lot more complicated than you suggest. You also have to deal with the case of brown outs where the power is only off for fractions

Re: [beagleboard] Power - shutdown

> > *Use a super capacitor.* > Ok, a little abstract . . . Use a super capacitor, and if using a console image . . . sudo apt-get install acpid Then the board will automatically shutdown when 5V input goes missing. I'd make sure you pick a super cap that can sustain the beaglebone for ~30

Re: [beagleboard] Power - shutdown

> > *I have been building embedded systems for a while now and I am > considering using the beaglebone (BBB) for an upcoming project, but I am > confused by everything I read regarding the shutdown requirements. As an > embedded system the only way to turn it off is to simply shutdown the power >

Re: [beagleboard] Power - shutdown

On Mon, May 2, 2016 at 10:36 AM, Yiannis Papelis wrote: > I have been building embedded systems for a while now and I am considering > using the beaglebone (BBB) for an upcoming project, but I am confused by > everything I read regarding the shutdown requirements. As an

[beagleboard] Power - shutdown

I have been building embedded systems for a while now and I am considering using the beaglebone (BBB) for an upcoming project, but I am confused by everything I read regarding the shutdown requirements. As an embedded system the only way to turn it off is to simply shutdown the power with a