On Thursday, February 26, 2015 at 1:33:01 AM UTC+1, Harvey White wrote: > > On Wed, 25 Feb 2015 15:51:21 -0800 (PST), you wrote: > > >Yes indeed, and that is a perfect way to shut down our baby. It's another > >way of pressing the power button. Thing is you need another 10 sec. of > >shutdown power (to cleanly shutdown). > > That's possible with a backup supply, NIMH/NICD with a resistor to > charge and a diode to prevent overcharge, if you have a cutoff when > the batteries reach 1.1 volts, you're fine. I'd suggest a 1 farad > capacitor, but the BBB wants several hundred mills when running, and I > suspect that's a bit much. > > Yeah 1 Farad is not enough to shutdown clean.
> > > >So I'm looking for the use case where somebody stupid (talking 'bout me) > >yanks the 5V and I still get a clean shutdown. We need external 'ups' > power > >for that last 10 sec. of shutdown. Now I keep 5V always on. Till power > >company screws up. 64 million dollar question: how many times can power > >company screw up before bbb screws up? > > Ok, comparator and you shut down (gracefully) when the DC power goes > away. Problem is to determine that (if you're also battery > powered.... this is good....) > reading ten times, no comprending. Do you no who you are? You aint what your not. And that al there is. > > > > >Question remains why I get a unclean shutdow with me (the stupid one) > >feeding 5v to otg usb with powerbar and getting clean shutdown when > >connected to regular pc. > > May have to do with how the power is actually disconnected, clean off > vs make/break/make/break by disconnecting > Ok. Could be. But it think it's hard & propably software. Don't believe in statistics on average. > > > > >Call me stupid but the correct answer awaits tickets for the next frank > >zappa concert! > > *or is that a *sears* poncho?* > > Harvey > > I guess: in serious leather! Thanks and sorry for zappian confusion, questions still stands: > > > >thx, > >Michiel > > -- 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.
