The limit is based on typical applications and the current rating of the pin and the etch on the PCB. There are no electronics that could prevent you from pulling 100A form a supply if it can provide that much. However, I would expect the etch on the PCB to be fried if you did that with smoke along the way.
Gerald On Sat, Feb 22, 2014 at 6:14 PM, <[email protected]> wrote: > Not sure that is strictly true. Vdd_5v (p9_5/6) supports up to 1amp > current draw when the board is powered via the jack. I have been running > servos off that pin with a 5v usb phone backup battery providing 2.1 amps > plugged into the bbb jack for months with no issues. > > I agree that your solution is far superior in the general case, and good > practice for motors (especially cheap and noisy ones), but a small servo > can be run just fine off the BBB directly. > > Having said that, the external power for motors is definitely the > preferred route. One of the things the OP should check is the duty cycle > of the servo in addition to the current draw. If it is a larger servo, > then definitely put it on its own power loop. Otherwise for a micro or > hoppy servo you may just need to ensure that the duty cycle is set > correctly. 60 tends to work for most analog servo's. > > Tim > > -- > 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/groups/opt_out. > -- 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/groups/opt_out.
