[arm-allstar] Reboot after few minutes

[Doug Crompton]

Tony,

 Agreed. The problem with the car adapters is two fold. One is that they
are a non-adjustable fixed voltage output and right at or slightly less
than 5V at load. When you go through the reverse voltage protector and the
polyfuse on the Pi 3B+ the voltage could drop to lower than the trip point
for low voltage detect. The other problem is reliability. We have seen
several failures but there are so many Chinese sellers it is hard to figure
which ones are good and which ones are not. There is also no way to tell
exactly what is inside. There is no way to remove the epoxy. There are so
hard even cutting them in a band saw is difficult to do and doesn't really
tell you anything. I use wall warts here mostly bought from Microcenter for
the Pi. If I was going to use a discrete supply I would go for one of the
open board buck converters with adjustable output rated at 3A. Use a
digital meter to set it to 5.2V when plugging into the .

Here is an example of the open board -

https://www.amazon.com/eBoot-Converter-Voltage-Adjustable-Step-up/dp/B06XWSV89D/ref=pd_sim_23_3/131-3949763-5412550

And a fancy one with a readout for voltage in and out and current -

https://www.amazon.com/Converter-DROK-Buck-Boost-Adjustable-Regulator/dp/B0789QVKKF/ref=pd_day0_hl_23_3/131-3949763-5412550


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Sat, Mar 9, 2019 at 1:02 AM "Tony Ross via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> 5V is one thing, sufficient amperage is another ... we need both, as
> it's a very common electrical problem. Usually >2.1A on an RPi is
> sufficient, unless greater current is needed for USB devices in which
> case a powered USB hub comes in useful.
>
> On 3/8/19 8:11 AM, "Dennis Ramos via ARM-allstar" wrote:
> > Hi David, Seems it is regularly, I powered it on gpio pin with 5v, using
> dc to dc, buck converter from 12v.
> >
> > On the log, just the normal sending registration for node....
> > Then suddenly it reboots, I have dvswitch apps connected locally, it
> beeps once it already disconnected.
> >
> > Regards
> >
> > Dennis
> >
> > Sent from my iPad
> >
> >> On 8 Mar 2019, at 15:56, Doug Crompton via ARM-allstar <
> arm-allstar at hamvoip.org> wrote:
> >>
> >> Well obviously that is not normal and I would have no idea what is
> going on
> >> either without some more information.
> >>
> >> What are the lights on the Pi doing when this happens?
> >>
> >> If you login to the Linux prompt are you getting any messages?
> >>
> >> What Pi version? Has it been updated?
> >>
> >> Any other information you can give would be helpful.
> >>
> >>
> >> *73 Doug*
> >>
> >> *WA3DSP*
> >>
> >> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> >>
> >> On Fri, Mar 8, 2019 at 10:46 AM "Dennis Ramos via ARM-allstar" <
> >> arm-allstar at hamvoip.org> wrote:
> >>
> >>> Hello guys, just wonder if you help me with my allstar, I just notice
> that
> >>> the server rebooted itself after a few minutes. I have no idea what is
> >>> going on.
> >>>
> >>> Any help is highly appreciated
> >>>
> >>> 73 de m0tfg
> >>>
> >>>
> >>> Sent from my iPad
> >>> _______________________________________________
> >>>
> >>> ARM-allstar mailing list
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> >>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >>>
> >>> Visit the BBB and RPi2/3 web page - http://hamvoip.org
> >>>
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> >>
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> >
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> >
>
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