I am trying to power two continuous turn servos with a 9 volt battery pack. When plugged in the servos 'click' every second or so and do not rotate. When plugged into a computer or outlet, they work just fine. I have asked a friend of mine and he had the same issue with his setup, but did not have an answer. The setup is an arduino uno that runs wires to a bread board, that holds the two servos and two IR sensors. Any ideas?
What kind of 9v battery? I you mean those small rectangle one then I would be suprized if it could handle even one servo as such batteries have very low current capacity. You say you are powering the servos with a 9volt pack, is that directly? Almost all R/C servos have a operating voltage rating of 4.5 to 6.0 volts DC, above that could damage the servo.