It needs to be steady at 5V. 4V is not going to work very well. You can try adding some bulk capacitance across the connections. Maybe 10uF to 20uF and add a 0.1uF as well..
Gerald On Thu, Feb 9, 2017 at 3:30 PM, felipe robles <electrofe...@gmail.com> wrote: > > <https://lh3.googleusercontent.com/-JEmDAWK-Rgc/WJzfPlDrkQI/AAAAAAAAKHI/_iT3bhBTQ4ctMziopdZwB6440ozQnCY-QCLcB/s1600/BBGW_power.jpg> > > > <https://lh3.googleusercontent.com/-JEmDAWK-Rgc/WJzfPlDrkQI/AAAAAAAAKHI/_iT3bhBTQ4ctMziopdZwB6440ozQnCY-QCLcB/s1600/BBGW_power.jpg> > Hello Gerald. > > DC-DC converter is stable at five volts in almost time, but there are some > events that looks like this picture. (voltage is under 4 volts.) > > > > > > El jueves, 9 de febrero de 2017, 17:32:15 (UTC-3), Gerald escribió: >> >> Is it exactly 5V? How much ripple is there on the 5V supply? What is the >> power source for the DC DC converter? >> >> Gerald >> >> >> On Thu, Feb 9, 2017 at 2:21 PM, felipe robles <electr...@gmail.com> >> wrote: >> >>> Hello Wulf >>> >>> My beaglebone is powering in P9_5 and P9_6 pins from DC DC converter >>> that supplies 5V from battery (charger controller). >>> >>> >>> El jueves, 9 de febrero de 2017, 17:09:59 (UTC-3), Wulf Man escribió: >>> >>>> looks like a power glitch. how are you powering this? >>>> >>>> On 2/9/2017 12:08 PM, felipe robles wrote: >>>> >>>> Hello folks >>>> >>>> My name is Felipe and I looking for solution or some hint to my newest >>>> problem. >>>> I got a BBGW running BeagleBoard.org Debian Image 2016-11-06. My >>>> project is get many measurements from differents sensors like conductivity, >>>> dissolved oxygen, and others. and put this values into web server using >>>> mobile broadband. The problem is that system is shuting down. I looking in >>>> log files I don't get many information. the most relevant information that >>>> i got is in /var/log/auth.log and says. >>>> >>>> Feb 9 11:06:01 beaglebone CRON[1050]: pam_unix(cron:session): session >>>> opened for user root by (uid=0) >>>> Feb 9 11:06:03 beaglebone CRON[1050]: pam_unix(cron:session): session >>>> closed for user root >>>> Feb 9 11:07:33 beaglebone login[574]: pam_unix(login:auth): check pass >>>> ; user unknown >>>> Feb 9 11:07:33 beaglebone login[574]: pam_unix(login:auth): >>>> authentication failure; logname=LOGIN uid=0 euid=0 tty=/dev/ttyGS0 >>>> ruser= rhost= >>>> Feb 9 11:07:36 beaglebone login[574]: FAILED LOGIN (1) on >>>> '/dev/ttyGS0' FOR 'UNKNOWN', Authentication failure >>>> Feb 9 11:08:01 beaglebone sshd[1107]: Accepted password for debian >>>> from 192.168.7.1 port 37207 ssh2 >>>> Feb 9 11:09:01 beaglebone CRON[1153]: pam_unix(cron:session): session >>>> opened for user root by (uid=0) >>>> Feb 9 11:09:03 beaglebone CRON[1153]: pam_unix(cron:session): session >>>> closed for user root >>>> Feb 9 11:09:23 beaglebone systemd-logind[357]: Power key pressed. >>>> Feb 9 11:09:23 beaglebone systemd-logind[357]: Powering Off... >>>> Feb 9 11:09:23 beaglebone systemd-logind[357]: System is powering down >>>> . >>>> >>>> >>>> >>>> my system have a beaglebone green wireless, 1 PCB that feed >>>> beaglebone from charger controller that connect to battery and power >>>> supply. >>>> >>>> Thanks for your attention >>>> Regards >>>> Felipe >>>> -- >>>> 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...@googlegroups.com. >>>> To view this discussion on the web visit https://groups.google.com/d/ms >>>> gid/beagleboard/ccec63ab-0ada-4b22-9a28-630c6e480a2c%40googlegroups.com >>>> <https://groups.google.com/d/msgid/beagleboard/ccec63ab-0ada-4b22-9a28-630c6e480a2c%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>> 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...@googlegroups.com. >>> To view this discussion on the web visit https://groups.google.com/d/ms >>> gid/beagleboard/551508dd-f5d2-4c8a-a6ba-8b056a3ae8c8%40googlegroups.com >>> <https://groups.google.com/d/msgid/beagleboard/551508dd-f5d2-4c8a-a6ba-8b056a3ae8c8%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Gerald >> >> ger...@beagleboard.org >> http://beagleboard.org/ >> gco...@emprodesign.com >> >> -- > 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/5b6a6a23-295c-41b0-9ba6-dad139f7712d%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/5b6a6a23-295c-41b0-9ba6-dad139f7712d%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Gerald ger...@beagleboard.org http://beagleboard.org/ gcol...@emprodesign.com -- 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/CAHK_S%2BfbeTKsW4yBaKqPPnzx89pjpCzPvm%2B3K4u3kQW9tj47yg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
