$100 Exoskeleton Arm (ExoArm)

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Introduction: $100 Exoskeleton Arm (ExoArm)

About: I've been working with robotics, programming and have been making things for 6 years now. My biggest achievement would be a drone that I made and programmed. I also entered the Hackaday 2017 prize with a che...

ExoArm is a relatively cheap, simple and yet powerful exo-arm design that will allow for a easy usage, which is especially important for elderly and other people who need this kind of help in everyday life.

P.S. (in the middle) I've entered Invention Challenge and I would be very grateful if you could take a second of your time to vote for this project. The button is on the top of this Instructable. Thanks!

The development of this project is beginning to focus itself more on the control of the arm, then the design itself. So, maybe the n.1 goal will be to make controlling the ExoArm as cheap and as intuitive as possible, before even starting to think about design and back support.

Processing will is done with an Arduino, so the code will be fairly easy to understand and modify when wanted. Current prototype will feature an motor on the elbow, but in further designs we will also implement a shoulder actuator. The ExoArm will have back support (sometime in the near future), so that all the weight will be evenly distributed to your body. Lifting capacity will be around max 10kg or 22 pounds.

Please keep in mind that this is still an project in development and will therefore be regularly updated here .

Also I would like to express my gratitude to MegunoLink Pro , because this is probably the most AWESOME serial interface for Arduino. It saved me tons of time because it has built-in plotting features, interface builders,...

Let's kick it off with HARDWARE. These are the parts I'm currently using:

  • Strain Gauge with Load Cell Amplifier
  • Aluminum 4 x 30 x at least 2000mm
  • Arduino Uno/Nano
  • VNH2SP30 motor driver
  • Car Windshield Wiper Motor
  • Long wires
  • Potentiometer
  • Li-Po battery 3S 5500mAh
  • Dad's hand held lawnmower thing that you put around your body and suspend the lawnmower on
  • Screws and nuts. M4 and M6
  • Duct tape
  • Zipties
  • Rope
  • Wooden plates (will soon be replaced by plastic plates)
  • Heat shrink tube
  • Belts to fasten ExoArm to your arm

Of course you'll also need:

  • Drill
  • Dremel tool
  • Saw
  • Rivet tool
  • and pretty much the whole workshop

Step 1: This Will Be Updated Soon!

First of all, this won't be "how to make" tutorial, because I already made a video and also, there really is no universal way of going about making one. Each person has unique arm size, each windshield wiper motor has different dimensions... you get the idea.

I'm currently under huge time lack due to exams, and will try to get back at it as soon as possible. Thanks for understanding!

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    18 Discussions

    0
    DarkRubyMoon
    DarkRubyMoon

    3 years ago

    That is fantastic! I've been thinking of trying to build one myself but i don't think i have the skills. If you ever consider selling one, contact me.

    0
    Tex Workshop
    Tex Workshop

    Reply 3 years ago

    Thanks! What do you mean by selling one? Like manufacturing, or just the one?

    0
    DarkRubyMoon
    DarkRubyMoon

    Reply 7 months ago

    I am just starting to work on designing one for myself. i have limited mobility in my arms and the retail versions of this start at five grand and those only use rubberbands. Are lots of people with disabilities who can't afford what is commercially available.

    0
    458WM
    458WM

    3 years ago

    Wow this looks great! I wonder if a project like this could be made for someone's legs?

    0
    rraviprasanth47
    rraviprasanth47

    Reply 1 year ago

    do u know anyone who make exoskeleton for legs?

    0
    Tex Workshop
    Tex Workshop

    Reply 2 years ago

    I guess it could be, but it would be expensive, since the motors that would be able to withstand the weight of a human are pretty expensive.

    0
    AhmadI65
    AhmadI65

    2 years ago

    amazing...i am making sametihng for my uni project,but dont have programing skills...kindly upload it or contact me if u have its program

    0
    Whitebear3
    Whitebear3

    3 years ago

    Amazing stuff!!

    0
    Ramji Kolappan V
    Ramji Kolappan V

    Reply 3 years ago

    This is one of my dream projects.. it's cool

    0
    Tex Workshop
    Tex Workshop

    Reply 3 years ago

    I'm glad this project inspired you! Now go on and make one yourself :)

    0
    HudExo
    HudExo

    3 years ago

    Great stuff. I am trying to build an affordable exoskeleton arm for my disabled son. Thanks for putting this together.

    0
    Tex Workshop
    Tex Workshop

    Reply 3 years ago

    Hey! I'm glad you find this helpful! If you decide to go on and make something similar and you have problems, don't hesitate to message me. I would love to help.

    0
    HudExo
    HudExo

    Reply 3 years ago

    Thanks! That is very kind of you! I will get started this week and keep you posted on our progress. Thank you for the support.

    0
    harishk99
    harishk99

    3 years ago

    cool

    0
    Tex Workshop
    Tex Workshop

    Reply 3 years ago

    Thank you harishk!

    0
    mderton
    mderton

    3 years ago

    AWESOME!!