From: Sean Luke <sean@cs...> - 2005-03-10 16:58:15
While V_BATT=5v is fine for the gumstix, it's not usabale for servos.
They need 6v to operate properly. Please set V_BATT to 6v.
On Mar 10, 2005, at 11:47 AM,
> V_BATT (which is output from one of the 5219's) would be 5v in your
> schematic, which is acceptable for both the gumstix and the Vin for
> the 5255 which generates the 3.3v Vcc.
From: Dave Hylands <dhylands@gm...> - 2005-03-10 18:28:57
On Thu, 10 Mar 2005 11:57:59 -0500, Sean Luke <sean@...> wrote:
> While V_BATT=5v is fine for the gumstix, it's not usabale for servos.
> They need 6v to operate properly. Please set V_BATT to 6v.
I think you're confusing the various power connections.
V_BATT doesn't go to the servos. It's only used for the gumstix
itself. The name is a bit confusing, but it existed before the
Robostix so it's still used as the voltage that goes to the gumstix
Either V_ROBOBATT or V_MOTOR (depends on how you've got things
jumpered) can be used to drive the servos. You can have seperate
batteries for V_MOTOR than you use for V_ROBOTBATT, or you can use the
same battery for both.
Just an aside, but servos also typically run with 4.8v to 6v, and I
routinely take mine up to 9v. So far the only one I've fried, is when
my mini-sumo Marauder got turned on while in my toolbox. On of the
wheels jammed, and the motor wound up melting the plastic on the
casing - Whoops.
Vancouver, BC, Canada