From: evilwulfie <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Friday, November 14, 2014 at 5:48 AM To: "[email protected]" <[email protected]> Subject: Re: [beagleboard] Labolatory power supply fails to power up BeagleBone Black
> > > As Gerald has said before, check the ramp up of the power supply. > Some of the lab supplys have slow ramp ups. > Yes they are very stable and VERY good regulation but > the BBB design requires a fast ramp up supply. It could also be that he has current limit set too low. Set the current limit to 2A or more. It would be helpful if we could see an oscilloscope capture of the startup waveform. Regards, John > > > > > On 11/14/2014 3:03 AM, bremenpl wrote: > > >> >> Hello there, >> I have a very strange problem with powering up BeagleBone Black (rev C).... >> When i try to power it up from some cheap AC adapter it works fine, but when >> I connect to to my labolatory power supply the power LED on board is lid for >> a second and then doesnt power up the MCU and turns off intead. I have >> connected both supplys to osciloscope and they are both stable, the >> laboratory one even more. Why is the power controller on the BeagleBone Black >> refusing to power up the MCU when powered from lab supply? I have no idea >> what is this about. I would aprichiate any help. >> >> -- >> 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 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 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.
