Hi, you need to ground your servo to both grounds. To the BBC ground and your power supply. You need a common ground to make everything work.
Roy 2014-10-15 2:29 GMT+02:00 <[email protected]>: > I believe you have misunderstood me :) > The servo is powered by an external power supply at 5VDC. The signal is > from an expansion header. The ground is the same expansion header's ground. > > On Tuesday, October 14, 2014 10:23:47 AM UTC-5, Gerald wrote: >> >> Please do not tie a 5VDC servo direct to the pins of the expansion header. >> >> http://www.elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Usage >> >> I doubt the servo, one that you have failed to define, can be driven by >> 6mA,which is the extent of the drive of the 3.3V pins on the board. >> >> >> >> Gerald >> >> >> On Mon, Oct 13, 2014 at 7:07 PM, <[email protected]> wrote: >> >>> Hi everybody. >>> I've got a Beaglebone Black Rev A6A here, and no matter what I do, I >>> can't get a servo running. I've tried Adafruit's nice BBIO.PWM library (to >>> no avail) and I've tried using Bonescript. I've grounded the servo to the >>> BBB, and run 5VDC in from a regulated Elenco supply to the servo. No matter >>> what I do, I can't get it to turn. If I ground the servo to the power >>> supply's COM, then it simply whines, no matter the duty cycle. If I ground >>> it to the bone, nothing happens. >>> >>> Thanks in advance. >>> >>> -- >>> 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.
