Servo Hand

this a robotic hand made of Styrofoam that can bend its fingers by means of servos

Supplies

Elastics, sanding block, exacto knife, paper clip, needle, pliers, fishing line, Styrofoam, marker, hot glue

Step 1: Draw Shapes

measure each of your finger's length and width of your palm and fingers with the ruler and use them to create crude shapes on a slate of Styrofoam with those dimensions.

Step 2: Shape Fingers

carefully cut those shapes out of the Styrofoam and use an exacto knife to cut of all corners of the fingers so it looks like an octagon.

Step 3: Sanding

sand down those edges to make a cylinder and then sand the tip to make a rounded end then sand the edges of the palm to make them slightly rounded as well.

Step 4: Make Fingers Bend

cut each finger into three parts horizontally and then cut the ends of those parts until the finger can bend at about a 90 degree angle

Step 5: Connect Fingers to Palm

use the needle to thread fishing line through the 3 parts of each finger an then thread the fishing line diagonally through

the palm where each respective finger goes. then use paper clips to hold the fishing line down on the

Step 6: Make Fingers Retract

after all the fingers have been attached cut the elastics to connect the pats of the fingers and glue them to the build I recommend using pliers to hold the elastics in place while the glue dries

Step 7: Hook Up Servos

tie the end of the fishing line to the servos to pull the fingers into a bent position

Step 8: Use Arduino

Use an Arduino to make the servos retract so you can orient the hand in any way you want