Two or more servos serial or in a parallel circuit

hello,

i new forum , did research before posting here, regardless, how stupid question is, not find appropriate answer.

i want control two-three servos of type:
http://www.pollin.de/shop/dt/nja5otcxotk-/fundgrube/modellbau/servomotor_analog.html

the pwm signal comes arduino uno, problems start.
i want maximum torsional moment, need voltage of 7.2 v.
i know power in joule or newton meter volt*ampere, 15 kg/cm = 7.2v * if divide 7.2v (15kg/cm)/(7.2v)=i,
so = 208.3 ma. true particular force, load different while servos running. every servo has different load, changing during runtime without relation others.

i want connect servos 1 additional electric source. don't know how this.
when use parallel circuit voltage same, ampere added. needed force different, needed ampere different too, how shoudl balance this? or servo adjust needed amperes? means have source 7.2 v , maximum possible ampere load?

my brain fried thinking problem whole day now.
i apprecciate much.

and sorry bad english hope meaning understandable.

bye,
manuel

you can power servos 1 external (to arduino) source.  each servo draw current needs.  should have 1 amp per servo, if may run @ same time,  3 servos- 7.2v @ 3a power supply.  connect red wires form servos external supply v+, servo black (or brown) wires , v- of supply , arduino ground, , servo signal wires pwm pins.

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Two or more servos serial or in a parallel circuit

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