Robotic Hand

This is how to make a robotic hand using only cheap materials.

We made this project for a STEM Math and Tech project.

Supplies

For the robotic hand you will need:

Materials Needed: Ruler, Marker

To trace the hand you will need to;

Trace a hand for the finger lengths and widths, length and width of the palm
From the lengths and widths of the fingers , draw them onto your piece of foam into accurately sized rectangles
Divide the fingers into three parts like knuckles

Materials Needed: Sandpaper, Rubber bands, Pointed rod, Wire, Paper clips, Marker, Foam, Hot glue

To create the foam hand you will need to;

Round the fingers we made with a piece of sandpaper
Using rubber bands tie the fingers together, leave some space in between each finger
Using a pointed rod, create holes throughout the finger
Through these holes, feed a wire through to the top of the finger, create a knot at the top to keep the wire tight and stable
Using the lengths and widths of your palm, trace it onto the remaining foam and cut that out
On the palm, use paper clips to make loops for all 5 fingers
Attach the fingers to the palm by getting the access wire at the bottom of the fingers and feeding it through the paper clip loops you made
At the beginning of the forearm, make five more paper clip loops in line with each other
Finally, pull more wire through the last five loops with enough to attach to the servos

Materials Needed: Servos, Foam, Marker, Hot glue

To connect the servos to the hand you will have to;

Cut a piece of foam to mount the servos
Trace 5 servos on to the foam
Connect the servos onto the foam by using hot glue
Finally, take the access wire you fed through the loops and attach it to the servos

Materials Needed: Arduino,Servos

Orange Input - Signal Input

Red Input - Power Input (VCC)

Brown Input - Ground Input(GND)

All servo motors power and ground connect to the motor shield
The signal inputs of all servo motors are connected to the Arduino Digital PWM 3-5-6-9-10
Connect the arduino board to your computer or laptop

Materials Needed: Computer

To begin coding the servos;

Add the servo library into your code
Define the servos by naming them as each finger
Add each servo that you just defined into the code with each pin they are connected to
Make commands using each servo and changing the value between 0-180 degrees, 0 being closed finger and 180 being fully open
add your commands to the loop
run the code while connected to your Arduino