Introduction: DIY $200 Robotic Hand - Arduino Project

I designed and built this robotic hand and the controller for less than $200.  The fingers and thumb are controlled by servo motors.  The first video shows the hand in action.  The second video shows how to make the hand. 

Here is Part 2: DIY $200 Robotic Hand Part 2: The Controller

Visit my website for an Arduino sketch to test the hand:

Parts you will need:
1 bicycle chain
1 spool SpiderWire fishing line (It's made with Dyneema, and I used 3 strands of 65 pound test line, which I made into a rope for each finger)
see my video for making rope with this fishing line:
1 Arduino  (I used the Uno R3)
1 Maker Shield (Maker Shed)
1 mini breadboard (Maker Shed)
4 servo motors
1 AA battery pack for 6 AAs
14 extension springs  (A 200pc. Spring Assortment from Harbor Freight Tools had all the springs I needed for the hand and the controller.  You can vary the length and spring wire diameter to adjust fingers)
11 #6-32 x 1/2" L machine screws (most hardware from Home Depot)
15 #6-32 x 3/4" L machine screws
3  #6-32 x 1 1/4" L machine screws
1  #6-32 x 1 1/2" L machine screw
2  #10-24 x 1 1/4" L machine screws (Stove Bolt Assortment from Harbor Freight Tools)
4  machine screws that will fit into the holes on the servo's horn. (~0.075" diameter)
6  2" L x 1/2" ID x 15/16" OD   #10-24 eye bolts (Eye Bolt Assortment from Harbor Freight Tools)
41 #6-32 nuts
17 #10-24 nuts
14 washers 1/2" OD
8 washers 3/8" OD
5 rubber washers 1/2" OD 1/8" thick
6 tapered rubber feet
3  1/2" snap studs  (Fabric Store)
1 small sheet of lexan 1/8" (.1" actual) (Home Depot)
4 tie down brackets (Home Depot)

Epilog Challenge V

Participated in the
Epilog Challenge V