I have got a SainSmart 6 DOF robot (https://www.sainsmart.com/collections/robotics-cnc/products/6-axis-desktop-robotic-arm-assembled)
To play it safe, I ordered the shield from Sainsmart (https://www.sainsmart.com/collections/shields/products/sensor-proto-shield-for-arduino)
When I look at the schematics of the shield (http://s3.amazonaws.com/s3.image.smart/download/101-20-102/Schematic%20diagram.png), it does not show any active components (like transistors).
This lends me to believe that the pins of the arduino are directly supplying the control signal to the servos. Is this acceptable? OR do you need drivers?
The motors as specified by Sainsmart are MG966R and SG90