If you do not use it properly, it will be damaged. That applies to every electronic circuit ever designed. I would have stopped using the circuitry after the second try.
I would be happy to look at your circuit and see if I can identify what the issue might be. Gerald On Fri, Jul 17, 2015 at 10:27 PM, <rosenbloo...@gmail.com> wrote: > I now have 4 damaged or dead BBBs. On this last board (Element 14), I had > only a stepper motor driver board connected (Pololu DRV8834), and nothing > else. The DRV8834 was initially drawing power from the VDD5v on the BBB. > The BBB "blacked out" twice while nothing was happening and while connected > to both a 5V regulated power supply (Adafruit) and USB power. I was worried > that the DRV8834 was drawing too much power (although I have found it uses > < 200 mA @ 5V), so I used a separate power supply for the DRB8834. Only the > logic of the DRV8834 was hooked up to the BBB - nothing that would supply > power and no analog inputs. The third blackout also occurred without an > obvious precipitant - again with both power sources connected (USB and > barrel plug). Now the power LED flashes briefly when either USB or barrel > plug power (Adafruit power source for BBB) is connected to the BBB. It will > not sustain the power button nor boot up. > > This seems to be a repetitive theme on this forum. I am losing faith in > the BBB ever functioning in a real world environment if it is this fragile. > Is there any way to protect the BBB processor (or whatever is blowing) with > external circuitry or power? > > Appreciate any help. I'm now out over $200 with these boards and I cannot > identify anything that should be damaging them. Considering changing to > another system at this point. Although I am impressed with the capability > of the BBB, I would not call it a robust system. > > Help! > > > > On Thursday, June 11, 2015 at 9:08:39 PM UTC-4, Gerald wrote: >> >> The flashing LED indicates excess current is being drawn by the >> processor. This can be related to damaged I/O pins or power supplies that >> are not well regulated.. >> >> Gerald >> >> >> On Thu, Jun 11, 2015 at 4:38 PM, <ahad...@gmail.com> wrote: >> >>> I have the same issue, already 3 boards has died. >>> any solution, i tried to use optoisolator/pwm and noting. the BBB is a >>> bad board. >>> >>> >>> >>> Le mercredi 25 février 2015 18:03:24 UTC+1, mdtsa...@gmail.com a écrit : >>>> >>>> Identical problem this morning: BBB boots fine when powered by USB, >>>> but not when powered by a 2.0 mA rated 5.0 V DC power supply (nicked from >>>> some other device). BBB power LED blinks continuously. This power supply >>>> has worked with this BBB in the past. >>>> >>>> Mike. >>>> >>>> On Friday, January 23, 2015 at 8:44:59 PM UTC-8, 1127...@gmail.com >>>> wrote: >>>>> >>>>> I had a similar problem- my power LED would just continue blinking >>>>> when connected to a 5V power source. This meant there was something wrong. >>>>> First, I checked if my BBB was still alive. To find that, I connected my >>>>> board to a computer via USB. Surprisingly, this time power LED turned on >>>>> normally. Then to make sure that everything was properly, I ran some >>>>> program as given in the BB website >>>>> http://beagleboard.org/getting-started. I was happy to see, the >>>>> programs on the website worked just fine on my board. Thus, I was able to >>>>> conclude that strangely, my BBB board didn't like 5V external power >>>>> source! >>>>> >>>>> On Friday, November 22, 2013 at 6:41:41 AM UTC-8, Bert Lindner wrote: >>>>>> >>>>>> >>>>>> Just had a 5V powered Beaglebone Black seemingly die on me. First the >>>>>> power led kept blinking, then after removing the (BB Toys CAN) cape the >>>>>> power led would flash just once after applying power. Looking back in >>>>>> previous threads this seemed to mean I killed the board somehow; there >>>>>> was >>>>>> also a GPS module attached to one of the UARTs and a probably power >>>>>> hungry >>>>>> USB wlan stick that I'm trying to get to work, so a power hungry setup. >>>>>> >>>>>> I was ready to declare it dead, it remained just flashing once after >>>>>> repeatedly unplugging and reattaching the power supply. >>>>>> >>>>>> However I noticed the single power led flash would also happen if I >>>>>> pressed the power button (leaving the 5V plug in). Doing that repeatedly >>>>>> seems to have revived the board, will see if new problems occur. For now >>>>>> it >>>>>> behaves normally. >>>>>> >>>>>> Is this expected behaviour? >>>>>> >>>>>> Best, >>>>>> >>>>>> -Bert >>>>>> >>>>>> -- >>> 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. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Gerald >> >> ger...@beagleboard.org >> http://beagleboard.org/ >> > -- > 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/d/optout. > -- Gerald ger...@beagleboard.org http://beagleboard.org/ -- 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/d/optout.
