PS (forgot about this one) If i am powering the BBB through those pins and and i also plug in the usb to connect to the PC is there a problem?, is the power switched to the USB or does it remain on the pins like in the case where the USB and 5V Barrel are both connected?
2014-07-06 18:06 GMT+02:00 Cristian Mitu <[email protected]>: > Hello John, > > I have looked at the link you have sent and it is a good idea but i can > just hook up a multimeter and see the current consumption that way since i > don't have time to wait for the device to come. > > Anyway as a slightly different question: I have been looking into the > datasheet of the BBB and it says i can power the board thorugh the > expansion header but doesn't specify much else about that and the internet > isn't too clear on some details. So what i want to know is the following: > > - Are the pins i am supposed to power the beaglebone through pin 5 and 6 > on P9? ( i am asking this beacuse when i powered the board through the > barrel connector those pins outputted 5V ). > > - Is there a limit to how much power can be drawn through those pins, or > does it draw however much the BBB needs ( i am estimating that with wifi > and everything else it can get up to 600-700mA). The reference manual > states that those pins can dish out 1A for supplying any add-ons, is it the > same for when you supply power to them. On the board i am making the 5V > voltage regulator that supplies the BBB can handle 2A so i am covered on > that end. > > > 2014-07-05 21:49 GMT+02:00 John Syn <[email protected]>: > > >> From: Cristian Mitu <[email protected]> >> Reply-To: "[email protected]" <[email protected]> >> Date: Saturday, July 5, 2014 at 12:37 PM >> To: "[email protected]" <[email protected]> >> Subject: Re: [beagleboard] BeagleBone Black Current Consumption >> >> Ok now i see it specifies above the cnditions in which the test was done >> with practically everything connected. The only thing i need to know now is >> by how much the currentconcumtion rises while using wifi. Probably a litle >> bit over 500mA. >> >> http://www.hardkernel.com/main/products/prdt_info.php?g_code=G137361754360 >> >> If you don’t have a way to measure the current consumption, this device >> might be handy. >> >> >> >> >> 2014-07-05 20:29 GMT+02:00 Cristian Mitu <[email protected]>: >> >>> Oh yes i have seen that part, i wasn't sure beacuse it said TBD in the >>> table but now i see that that is only for the reset state only. And from >>> what i understand the USB's are limited to 500mA, and the kernel booting >>> peak is 460mA. But it doesn't specify for the other devices. >>> >>> >>> 2014-07-05 20:11 GMT+02:00 William Hermans <[email protected]>: >>> >>> Cristian, >>>> >>>> There is a table of power consumption conditions in the TRM for the >>>> Beaglebone black. 460 ish mA when everything like USB / ethernet / hdmi >>>> etc is used( if memory serves ) But do double check, as my memory for such >>>> things isnt always perfect. >>>> >>>> >>>> On Sat, Jul 5, 2014 at 10:42 AM, Cristian Mitu <[email protected]> >>>> wrote: >>>> >>>>> Hello, >>>>> >>>>> I need to know how much current does the beaglebone black need in two >>>>> situations: >>>>> >>>>> - worst case scenario - where everything is used (except extension >>>>> headers) >>>>> - specific setup - where i use the usb for wifi , data cable plugged >>>>> in and debuger at once. >>>>> >>>>> The data sheet says 1A is sufficient for powering the board but if i >>>>> have power hungry devices like the wifi more may be needed. >>>>> >>>>> Regards, >>>>> Cristian >>>>> >>>>> -- >>>>> 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 [email protected]. >>>>> >>>>> 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 a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/A9I79N2WyqM/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> 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 [email protected]. >> 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 a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/A9I79N2WyqM/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> 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. 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