Duration 1:42
'How I made bionic arm out of junk' - BBC News
Published 28 Jan 2016
I Wayan Sumardana, a welder in Indonesia who claims to have made a "bionic arm" out of scrap metal, says he's been obsessed with machines from a young age. Subscribe to BBC News HERE http://bit.ly/1rbfUog Check out our website: http://www.bbc.com/news Facebook: http://www.facebook.com/bbcworldnews Twitter: http://www.twitter.com/bbcworld Instagram: http://instagram.com/bbcnews
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>Can't afford food.
>Lost "control" on left arm.
"I guess I'll build a robot arm with my extensive knowledge in robotics while welding using bootleg sun glasses to buy rice!" ... 44
To create a "bionic arm" like that, the knowledge in following fields should be required:
1. Neuroscience:
Observe that the "electrode" headband thing on his head isn't even close to the part of the brain that controls movement (cerebellum, located at the lower back of the head). Say that he is using other parts of the brain, which is possible, note that "Electrodes" are also precise devices, you can't simply put a headband thing and expect them to read the brain activity that you want.
2. Computer Science/Computer Programming:
Ever heard of Evolutionary Algorithms, Genetic Algorithm, Back Propagation and the likes.
Please be informed that every human brain are slightly different from each other. One needs to know that a certain set of brain activity corresponds to a certain set of movements, emotion, sensations etc. These always happens at the same time and so Brain cells or Neuron firing signals are always mixed up with one another.
That is why you need to filter which set Neuron Signals you want to use and you need a computer to do that
, and no not the mother board (or whatever it is) at his back.
3. Mechanical Engineering:
Check out that very powerful "Actuator", it sure can carry his entire "paralyzed arm".
there is also and actuator starting from his upper right chest to his shoulder, if it is moving it will just move the structure on his shoulder out of place.
(i should stop here, just see for your self, Camera angles doesn't allow you to have a good look at the contraption but it still wrong in so many levels).
4. Electrical Engineering: Which he learned in High School, so OK:
5. Ummm, welding: he good at that:
And perhaps other science that i haven't thought or heard of. ... 15
1) Tubes from medical oxygen delivery (for no reason at all)
2) Left red module is some kind of video recording device (Camera + SD CARD SLOT), Green device is probably a toy with a power supply and a small micro-controller (Plus a crystal osc). Makes no sense in any bionic arm.
3) A mouse with some LED's, yes an Optical mouse, with the camera :)
4) Fake/Pneumatic looking devices and pipes which cause no sound at all :P
5) Motors without power supply or control wires, or even position sense/feedback mechanism.
6) Stepper motor apparently runs with just two wires, that's just hilarious. Again the feedback not used. And, we are not even talking BLDC here.
These were the glaring ones, now if I start about the sensing, analysis and its going to get messy. Let's start with the sensor, , its supposed to turn on the blue LED's when it receives a 'brain wave'.
Apparently, it has no signal conditioning, per-amplifiers and any of the required precise electronics to do any of that. Its technically impossible to modify that circuit to read brain waves, its just not going to work. Moreover, the signal processing needs much more processing than shown, I mean orders of magnitude higher than shown here; in simple terms, the arm is a much more complex thing than people seem to believe, and neuro-science is damn hard.
Even if we assume (of course the assumption is not true anyway), that the brain signals are read somehow, the motors and pneumatic system is just fake and it cannot work. Any, such system needs a closed-loop to work. No feedback and the device would go haywire, its simply how it works. Stepper motors have two pairs of coils at a minimum and need 4 wires to be driven, 2 wires as shown in the video won't and can't work.
What job two cameras, and the mouse on the back is doing is just baffling. Last but not the least, an air pneumatic system without a working pump (and, yes it causes sounds, lots of it).
The saddest thing is to see that anyone in BBC is not able to call it a hoax.
The BBC website states 'He claims the machine is controlled by brain signals, but experts have cast doubts upon it', I mean just doubts, what kind of experts are these, who cannot call out a hoax :( ... 477
Oakleys he's sporting while welding aren't gonna do jack-shit to protect his retinas from the arc flash of his welder. 3
Lights on the device flash erratically
Yep checks out 6
At the 1min mark you can see the headband just has the guts of a cheap SD card video camera tied to it. There's also no contact points on the inside of the headband by which either brainwave monitoring or resistive lie-detection could work.
The thing on his back with a green LED is the guts of an optical mouse.
The elbow gearbox has no output. The "pistons" are air-springs that would push rather than pull if they worked at all. The shoulder bracket is a bicycle brake caliper that would snap if it actually had any load put on it like that. The potentiometer on the shoulder has its shaft welded to something that can't turn. The guts of a laser-printer, the suspension air reservoir from a car, bits of old hose..
Also, you know, his arm moving freely around inside it at .
Bravo sir, you've shown how low the technology reporting of the BBC has fallen. I'm off to strap some xmas light to a broom and tell them I'd made a ray-gun. ... 17
-Spiderman
keep up the good work
However, the sound from pneumatics seems non-existing, steppers seem too weak and I don't get how he localize with enough accuracy which part of the brain being responsible for which part of the signal. ...
The jaeger program was born 2
look at his arms and you will see something.. its like pulling, pushing and more, you will notice also the fingers.
The man made a fully functional-prosthentic arm that can read brain waves ! The man must be respected for his skills in... Marketing lol, he obviously got a few people to sign up for his welding class or workshop after this😂 ... 3
Do you know there are open EEG software tools out there?
Is it claimed it controlled his "entire" arm?
and also watch the machine if its really pull/push some of its part to bend his arm. not exactly. this is one good joke :)
TBH, machines move slow in this kind of situation. i mean in the way of moving it, how it bends. and thinking about that parts :O wow. ... 1