> > > Can you say more about this "IT kit"? I'm wondering if it was trying to > draw excessive current. The board itself can work off of USB power just as > well as the power jack, depending on what external hardware is connected. > basically it was just to say that I'm using a 5V / 2A quality source. It's from an IT development kit.
> Does the power LED come on? > The power led flash fast one time. unfortunately the board is dead :| I made some mistakes and I believe there was some leakage of some peripherals to the GPIOs while the bord was off or early in the power on sequence, since I had an cape powered by the VDD_5V and not by the SYS_5V. Another problem i detected was a incorrent resistor calculation for a transistor that drains between 5ma and 6ma when my limit should be 4ma. It was switch to a BJT or FET transistor with current drain in the order of micro or nano apameres, so I hope to eliminate this problem. Em segunda-feira, 11 de março de 2019 18:31:56 UTC-3, Rogério Lucas escreveu: > > Hello everyone, > > I need help and would be grateful for any help to understand what happened > with a unit of my BBB wireless. I'm not looking for RMA, but only to > understand what might have caused the board to burn. > > It happened the following: > The board was plugged into an LCD and connected to a 5V - 2A power supply > (it came from an IT kit with an am335x) and also connected with a USB cable > on my Macbook; > I had been using this board with no problem, and last night I execute a > halt on the command line and went to sleep. In the morning I instead of > unplugging the USB cable I just turned off the power supplying the 5V > source and forgot to disconnect the USB cable, so I stayed for some time > connected only by the USB port, but as I was in halt and nothing happened, > so I turned on the 5V source again and then the board did not call anymore. > > I had plans to create a custom version of the board with a onboard LCD > input, a DAC and a few more components, but I'm scared to now. I'm in the > middle of a very big project, i do not know what direction I should take > now. I'm afraid to continue with the platform as the basis for my project. > > I do not know if there was a problem in the power source during the night, > I'm very worried because the board just short circuit without using it, I'd > be very happy if I knew I did something wrong, but it's not the case. > > I would also like recommendations to project a Surge Protection Device. > Any help is welcome. > > Thanks in advance! > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/0cfab8ba-279f-432b-b696-d382ef3e218a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
