Instructables

DIY Prosthetic Hand & Forearm (Voice Controlled)

FeaturedContest WinnerContest Winner
Picture of DIY Prosthetic Hand  & Forearm (Voice Controlled)
100_6555.JPG
100_6542.JPG
100_6546.JPG
IMG_0684.JPG
100_6537.JPG
100_6558.JPG
*UPDATE* Just wanted to add a bit of how posting this Instructable has positively impacted me. Besides the wonderful reception and feedback I received in the contests and the success it has had in the contests it helped me define my interests. I've always loved robotics and prosthetics (and similar helpful devices) is a new interesting and beneficial application for it. Posting this project got me involved in a prosthetics research team and we may even be using this exact arm, or one similar, for testing. Thanks all!

Do you live with only one hand, or ever feel two just isn't enough? Well now you can make another! This project combines two very cool things: an arduino voice recognition shield and an open-source 3D printed robotics project called InMoov. Basically what I've done is modify the InMoov hand/forearm to be usable as a prosthetic (or additional appendage) and add a VR (voice recognition) shield to receive verbal commands and then make corresponding motions with the hand. The advantage of voice control is that it doesn't require muscles and is more flexible to different physical conditions (also hands free!). My program includes 15 general hand gestures and actions for everyday living! When I was looking into myoelectric arms kept thinking that the functionality wasn't worth the thousands of dollars. While mine isn't as fancy as some it's remarkable what you can create with desktop 3D printers, an arduino, and servos! I think the coolest part is the customization: the printed parts can be scaled to make an accurate prosthetic for anyone. Although this project can look intimidating, the entire time taken (if you work on the electronics while parts are printing) is about 14 hours! See it in action! (If embed doesn't work try the link HERE)

 
Remove these adsRemove these ads by Signing Up
1-40 of 79Next »
bdonga2 months ago
can u plz add a video in hand assembling !!!!!
dreamzrush2 months ago

That is really helpful. Great job. :)

buckminster6 months ago

The video appears to be shot using stop-action animation. Could we see how the fingers are made to operate in real time?

makesomeso7 months ago

awesome project. One of the best project in instructables, keep it up.

Marc_Escobaem8 months ago

Hey! i worked at one of the biggest prostheses company in germany on the topiv of myoprothesis control and electronics, and i have to say: your arm is really impressive! cool idea and keep up the great work!

LucasOchoa1 year ago
Really cool stuff man.
I'm missing my left arm at the elbow. Is this completed item available for sale?
Thanks, Ron
Ey man ! :) thats a very very cool useful amazing gamechanging project u have done ! Can u please tell me where do i get the blue prints & list of parts & tools required ? :) By the way i'm now a fan of u ! I voting this project !
sagar09111 year ago
why the pdf can not download free..??
Question: do you have to put some kind of spring or whatever so that it would un-flex ?
Mizchief100 (author)  johnmeljohn1 year ago
Actually the fishing line runs on both sides of these 'hinges' in the finger and hand design so the motor turns one way to curl them and then the other way to straighten them out. Hope that helps!
impressive project!
Mizchief100 (author)  andrea biffi1 year ago
Thanks :)
as a useful idea, you could look up some techniques for making a latex rubber "skin" for the hand/forearm. Here's an ibble that should allow you to make a thin foam latex skin on the cheap!

http://www.instructables.com/id/Using-gelatin-for-moulds-and-prosthetics/

Why not try it out and post an update pic here if you decide to do it?
Mizchief100 (author)  EngineerJakit1 year ago
Very cool! I'll look into it.
AMAZING!!!!!! PATENT THIS!!!!!

I don't know if you know--or care!!!--but the cost for a basic lo tech prosthetic leg is about 17000$ USD--thus putting it out of reach for MOST of the world. There is NO good reason for that! And a leg is SO much lower tech than an arm---

My latest faux leg has a hydraulic ankle and cost something like 22000$. And this is STILL pretty lo-tech and basic. A "C Leg" costs something like 60000$ or more.

I don't even want to THINK of how much a bio-compataible ARM might cost. And a lot of arm amputees won;t wear the ones they have--they are not comfortable and don't DO what they claim they do. This one on the other hand---um---well----

If you are serious about the whole 3-D printing thing--hows about 3-D printing the entire BODY POART for trasnplant? Yeah--I know--it is being done veeeeeeerrrryyyy slooooooly--but some one who could "Jump Start" this---Well sign ME up for the first test! After all---what MORE do I have to lose???

Mizchief100 (author)  valkgurl1 year ago
I'm glad you have such an interest! Hah your suggestions are wonderful but even better than patenting I'm giving the blue prints on how to make your own!
teknohawk1 year ago
That is so awesome!!!
nerd74731 year ago
Great project I love that you added the stl files
dschurman1 year ago
Great project. I've been attempting to build my own variation of a robotic hand control, and I stumbled upon this instructable and you showed me InMoov... My high school even has a 3D printer, which is awesome. Thank you, and keep up the great work!
Wonderful job! You are very talented and your heart is in the right place! I know I will see more great projects from you in the future!
How much would that cost
Interesting in building this or at least trying to... But 3d printers cost to much
Mizchief100 (author)  -shadowbot-1 year ago
You could try using a 3D printing company who will print parts for you. Check out Shapeways.
Anyway to get the parts without a 3d printer
jwc45201 year ago
Well Done Sir, Many years ago (1970's) I studied Bio-medics in college, without the aid of such wonderful things as a 3-d printer or even the arduino. Please continue on the path of designing such things as there are many in need. Now we do have the technology to rebuild those in such need.
kooth1 year ago
Excellent Instructables! Well-done! Your explanations are easy to follow, as are your pictures. Once I get a 3D printer, I'll give this one a try!
Mizchief100 (author)  kooth1 year ago
Awesome, if you do please feel free to post pics or give me some feedback! Hope it all works well :)
I only have one arm and I'm keen on it :-) Nice idea! Greetings from Berlin…
Mizchief100 (author)  eve_everywhere1 year ago
Glad you liked it!
That is awesome!
sath021 year ago
Wonderful work!
Can I stop by to see it in action? I'm in Chicago too!
Mizchief100 (author)  sath021 year ago
Thanks! And unfortunately I just left for college, so I am no longer in the city... Perhaps on break sometime? Message me if you'd like.
That's OK. Your education is more important. And good luck in your education!
And I hope my curiosity to see you work did not make you think of me as a bad guy. IF so I apologize to you for that.
Be very very careful about meeting anyone. Do a careful background check and have someone else with you, preferribly someone BIG. Don't do it at home. You can never take it back once they know where you live. Be careful.
Fantastic. Some comments too. Get job
Edgar1 year ago
A very worthy idea, and can also serve for performing dangerous tasks, or just for an extra hand, to hold something, and then let go, at crucial moments! :)
Voted and Blogged:
http://faz-voce-mesmo.blogspot.pt/2013/08/uma-micro-turbina-uma-mao-artificial.html
Mizchief100 (author)  Edgar1 year ago
All true! Glad you enjoyed it :)
MrConfused1 year ago
Cool project! but i got to know, can the prosthetic be activated only by your voice or can it detect anyone?
Mizchief100 (author)  MrConfused1 year ago
The voice recognition board has universal commands that anyone can trigger or ones for a specific person can be programmed in (which is what I did). So either way, but the person specific ones can be trained and used for any person, not just me.
1-40 of 79Next »