Has somebody done this already? Indeed, I see two separate issues that would need to be addressed here.
The first, that of an external system applying power to the BBB IO when the BBB is not powered up, can often be addressed with external series resistors and schottky clamping diodes. The alternative is system power sequence control. The second, is that of power management. I am working on this right now for one of my projects. Requirements are: 1) a reservoir of power for the BBB to do it's shutdown housekeeping (battery or capacitor) 2) an external controller to manage power when it sees the input start to sag -- and control when it is allowed to power back up! 3) a working ACPID system, or alternatively a home-brew equivalent using interrupt IO. I'll post my solution when available. I'm using an external PIC micro-controller and a P-channel MOSFET. If my solution is attractive to others, the Motorola purists out there will certainly be able to use something like an MSP430 instead... Don On Thursday, May 25, 2017 at 4:11:35 PM UTC-4, RobertCNelson wrote: > > > > Sounds like someone needs to design-in a front end to handle that... ;) > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > -- 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/fb5b6a8c-6da3-4497-bcbf-80aae69ed593%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
