11.7V supply shouldn't be a problem because it can take up to 25V, but I'll try a heat sink and see if that helps.
On Wed, Mar 5, 2014 at 2:05 PM, Gerald Coley <ger...@beagleboard.org> wrote: > Because the regulator is going into thermal limit due to excessive heat > dissipation. Make the 11.7V supply say 8V and it will run longer. The hole > in the tab of the regulator is for the heat sink. > > Now, if the regulator is putting out 7V, then it could be the board. > > Gerald > > > On Wed, Mar 5, 2014 at 1:02 PM, Dorian Levy <dorianal...@gmail.com> wrote: > >> Because the IC can't provide the required current without a heat sink? Or >> because the BBB is going into thermal protection? A little insight into why >> you would expect that would be appreciated." >> On Mar 5, 2014 1:43 PM, "Gerald Coley" <ger...@beagleboard.org> wrote: >> >>> OK. Then what you are describing as your issue, i would expect to happen. >>> >>> Gerald >>> >>> >>> >>> On Wed, Mar 5, 2014 at 12:37 PM, Dorian Levy <dorianal...@gmail.com>wrote: >>> >>>> No heatsink 5V >>>> On Mar 5, 2014 11:13 AM, "Gerald Coley" <ger...@beagleboard.org> wrote: >>>> >>>>> Are you using a heatsink? Voltage? >>>>> >>>>> Gerald >>>>> >>>>> >>>>> >>>>> On Wed, Mar 5, 2014 at 10:07 AM, Dorian Levy <dorianal...@gmail.com>wrote: >>>>> >>>>>> Addicore 5V 1.5A Positive Voltage Regulator L7805CV >>>>>> >>>>>> >>>>>> On Wed, Mar 5, 2014 at 10:52 AM, Gerald Coley <ger...@beagleboard.org >>>>>> > wrote: >>>>>> >>>>>>> That particular regulator can have different pinouts. I have been >>>>>>> bitten before. So double check that based on the supplier. >>>>>>> >>>>>>> What voltage are you seeing on the output? I believe the best you >>>>>>> can get out of that regulator without a big heatsink is maybe 500mA >>>>>>> which >>>>>>> is borderline for the BBB. You are dropping 6.7V across the regulator. >>>>>>> >>>>>>> Gerald >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed, Mar 5, 2014 at 8:57 AM, Dorian Levy >>>>>>> <dorianal...@gmail.com>wrote: >>>>>>> >>>>>>>> On Mar 4, 2014 7:42 PM, "Gerald Coley" <ger...@beagleboard.org> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Can you share a schematic with me? I can't visualize what you are >>>>>>>>> doing. >>>>>>>>> >>>>>>>>> Gerald >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Tue, Mar 4, 2014 at 5:05 PM, Dorian Levy <dorianal...@gmail.com >>>>>>>>> > wrote: >>>>>>>>> >>>>>>>>>> I am building a robot that uses an 11.7V battery. I tried >>>>>>>>>> attaching a 5V regulator to the T5(+)/T8(-) (pins with the T6(SENSE) >>>>>>>>>> bridged to T5 and a 10K resistor between T8(TS) and ground. The >>>>>>>>>> board only >>>>>>>>>> stays on for about thirty seconds then shuts down. Is it because of >>>>>>>>>> the TS? >>>>>>>>>> What type of thermistor does it use? Or should I try to use the >>>>>>>>>> barrel jack >>>>>>>>>> since it's not directly connected to a battery? >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> 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. >>>>>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>>>>> >>>>>>>>> >>>>>>>>> -- >>>>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>>>> --- >>>>>>>>> You received this message because you are subscribed to a topic in >>>>>>>>> the Google Groups "BeagleBoard" group. >>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>> https://groups.google.com/d/topic/beagleboard/-Zb4VUlh5Mg/unsubscribe >>>>>>>>> . >>>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>>> to beagleboard+unsubscr...@googlegroups.com. >>>>>>>>> >>>>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>>>> >>>>>>>> -- >>>>>>>> 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. >>>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>> --- >>>>>>> You received this message because you are subscribed to a topic in >>>>>>> the Google Groups "BeagleBoard" group. >>>>>>> To unsubscribe from this topic, visit >>>>>>> https://groups.google.com/d/topic/beagleboard/-Zb4VUlh5Mg/unsubscribe >>>>>>> . >>>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>>> beagleboard+unsubscr...@googlegroups.com. >>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>> >>>>>> >>>>>> -- >>>>>> 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. >>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>> >>>>> >>>>> -- >>>>> For more options, visit http://beagleboard.org/discuss >>>>> --- >>>>> You received this message because you are subscribed to a topic in the >>>>> Google Groups "BeagleBoard" group. >>>>> To unsubscribe from this topic, visit >>>>> https://groups.google.com/d/topic/beagleboard/-Zb4VUlh5Mg/unsubscribe. >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> beagleboard+unsubscr...@googlegroups.com. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>> -- >>>> 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. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/-Zb4VUlh5Mg/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> beagleboard+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> -- >> 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. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/-Zb4VUlh5Mg/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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