For the external source, if your BB loses power, then you'll be powering it up through the esd does in the pin connected to that external power source. It probably won't survive.
A general rule is to never apply voltage to a devices pin unless that device is powered up, unless it is in the devices design (rare). (typing with phone sucks) -- 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.
