This is a robotic hand. It uses Servo motors to perform a simple action of moving the fingers into a grasp.
We use 3 servo motors, one for the thumb and one for 2 fingers each and they move independently.
The Hand is 3D printed and the base is laser cut.
The base contains the electrical components.
Thumb - 1 Servo
Thumb + 2 Fingers - 2 Servos
All Fingers - 3 Servos