Feetech scs15 smart control digital servo with metal gears and brackets feetech scs15 the scservo is a multipurpose uart bus robot servo designed for use with arduino requires ttlinker board the unit can work in both servo mode and wheel mode the servo mode can be wired together in robots to control limbs and set them at specific angles the wheel mode is intended for wheel type operations the scservo can give feedback on the values of position temperature load speed and input voltage