While medical facilities continue to improve worldwide, access to expensive treatments still eludes a vast amount of people. Especially when it comes to prosthetics, a lot of people won’t be able to afford something so personalized even though the need for assistive devices is extremely high. With that in mind, [Guillermo Herrera-Arcos] started working on ALICE, a robotic exoskeleton that is low-cost, easy to build, and as an added bonus, 100% Open Source.
ALICE’s creators envision that the exoskeleton will have applications in rehabilitation, human augmentation, and even gaming. Also, since it’s Open Source, it could also be used as a platform for STEM students to learn from. Currently, the team is testing electronics in the legs of the exoskeleton, but they have already come a long way with their control system and getting a workable prototype in place. Moving into the future, the creators, as well as anyone else who develops something on this platform, will always be improving it and building upon it thanks to the nature of Open Source hardware.
Is this a case of a good design gone wrong in the build phase? Or is this DIY prosthetic arm a poor design from the get-go? Either way, [Will Donaldson] needs some feedback, and Hackaday is just the right place for that.
Up front, we’ll say kudos to [Will] for having the guts to post a build that’s less than successful. And we’ll stipulate that when it comes to fully articulated prosthetic hands, it’s easy to fail. His design is ambitious, with an opposable thumb, fingers with three phalanges each, a ball and socket wrist, and internal servos driving everything. It’s also aesthetically pleasing, with a little bit of an I, Robot meets Stormtrooper look.
But [Will]’s build was plagued with print problems from the start, possibly due to the complex nature of the bosses and guides within the palm for all the finger servos. Bad prints led to creaky joints and broken servos. The servos themselves were a source of consternation, modified as they were for continuous rotation and broken apart for remotely mounting their pots in the hand’s knuckles. The video below relates the tale of woe.
There’s a lot to admire with [Will]’s build, but it certainly still has its issues. He’s almost to the point of other more successful DIY hand builds but just needs a little help. What say you in the comments line? Continue reading “Fail of the Week: Good Prosthetic Hand Design Goes Bad”
Prosthetic and assistive technologies have come have come a long way in recent years. When there are not only major medical research organizations, but individuals getting on board designing tools to improve the lives of others? That’s something special. Enter a homebrew essay into this field: ExoArm.
Attached to the body via what was available — in this case, the support harness for a gas-powered weed-eater — which distributes the load across the upper body and an Arduino for a brain, ExoArm designer [Kristjan Berce] has since faced roadblocks with muscle sensors meant to enable more instinctive control. So — for now — functionality is limited to a simple up and down motion controlled by two switches. It is worth noting that the down switch is currently mounted in such a way that when the user moves their arm down, the ExoArm follows suit, so there is some natural feel to using the arm in its present iteration.
Continue reading “An ExoArm For The Elderly”
One of the biggest problems for prosthetic users is feel. If you’ve ever tried to hold a pen and write with a numb hand, you’ve realised how important feedback is to the motor control equation. Research is ongoing to find ways to provide feedback from prosthetic limbs, in even a basic format. The human nervous system is a little more complex than just interfacing with the average serial UART. One of the requirements of many feedback systems is power, which usually would involve bulky batteries or some form of supercapacitors, but a British team has developed a way to embed solar cells in a touch-sensitive prosthetic skin.
The skin relies on everyone’s favourite material of the minute, graphene. A thin layer of graphene allows the prosthetic to feed signals back to the user of both temperature and contact pressure. The trick is that the graphene skin is incredibly transparent, reportedly allowing 98% of light on its surface to pass through. It’s then a simple matter of fitting solar panels beneath this skin, and the energy harvested can then be used to power the sensor system.
The team does admit that some power storage will later be required, as it would be difficult for any prosthetic user if their limbs lost all feedback when they walked into a dark room. The idea of one’s arm losing all feeling upon going to bed isn’t particularly appealing. Check out the paper here (paywalled). Video below the break.
We see a lot of great prosthetic projects cross our desk here at Hackaday – like this 3D printed prosthetic hand. Prosthetics definitely matter, so why not build your own and enter it in the 2017 Hackaday Prize?
Continue reading “Solar-Powered Prosthetic Skin”
To “pipe in” the new year, [John] decided to build a bagpipe-playing robot. Unlike other instrument-playing robots that we’ve seen before, this one is somewhat anatomically correct as well. John went the extra mile and 3D printed fingers and hands to play his set of pipes.
The brains of the robot are handled by an Arduino Mega 2560, which drives a set of solenoids through a driver board. The hands themselves are printed from the open source Enabling the Future project which is an organization that 3D prints prosthetic hands for matched recipients, especially people who can’t otherwise afford prosthetics. He had to scale up his hands by 171% to get them to play the pipes correctly, but from there it was a fairly straightforward matter of providing air to the bag (via a human being) and programming the Arduino to play a few songs.
The bagpipe isn’t a particularly common instrument (at least in parts of the world that aren’t Scottish) so it’s interesting to see a robot built to play one. Of course, your music-playing robot might be able to make music with something that’s not generally considered a musical instrument at all. And if none of these suit your needs, you can always build your own purpose-built semi-robotic instrument as well.
Continue reading “Ardu McDuino Plays the Bagpipes”
The creators of this Hackaday Prize entry say every month a new 3D-printed prosthetic solution comes on the scene. That doesn’t mean they’re not doing something different with their entry; yes, they’re still building a prosthetic hand, but they’re putting their own spin on it. This one isn’t using a string/cable/tendon setup, and the hand doesn’t even have four fingers. [Giovanni] and [Jenny] are going their own way, and what they’ve come up with is pretty special.
The most obvious feature of this prosthetic hand is a missing digit – Simpsons Hands – but this makes a lot of sense if you think about it. It’s doubtful any 3D-printed prosthetic hand will play a piano or touch type in the near future, so a pinkie finger is an appendix; an unneeded vanity that just increases the BOM and makes things harder to fit together.
Apart from the Simpsons Hands, this prosthetic hand is more or less what you would expect. The circuitry is just an Adafruit ATmega board, the mechanism is just a few servos, and the mechanics are well designed in carbon fiber PLA. What makes this prosthetic hand special for the team is that it’s the first of its kind in their native Colombia. Even if there’s a new 3D-printed prosthetic hand on Thingiverse every few weeks, this project makes it a truly global effort, and a great entry for the Hackaday Prize.
In recent years, prosthetics have seen a dramatic increase in innovation due to the rise of 3D printing. [Nicholas Huchet] — missing a hand due to a workplace accident in 2002 — spent his residency at Fab Lab Berlin designing, building, testing and sharing the files and tutorials for a prosthetic hand that costs around 700 Euros.
[Huchet] founded Bionicohand with the intent of using the technology to make prosthetic limbs available to those without reliable medical or social assistance — as well as for amputees in countries without such systems — which can cost tens of thousands of dollars. The parts took a week to print while assembly and modifications to suit [Huchet’s] arm took another four days, but the final product is functional and uses affordable myoelectric sensors, boards and servos — plus there’s always the option of using a basic 3D scanner to accommodate for existing prosthetic mounts for the individual.
Continue reading “3D-Printed Prosthetic Puts the Power in the Hands of Those Who Need It”