control 12 servos with my son's eeg

WhiteT · July 2016

but i dont have any idea of controlling even one? It's for my son i'd really appreciate if you'd help me
if this helps i've a some skills at java and c++
please suggest what else i need to learn if i want to control every single motor with different brainwave

wjcroft · July 2016

Have you looked through Chip's blog?

http://eeghacker.blogspot.com/2014/06/controlling-hex-bug-with-my-brain-waves.html

Also see the related SSVEP or Motor Imagery posts,

http://openbci.com/forum/index.php?p=/search&Search=SSVEP

http://openbci.com/forum/index.php?p=/search&Search=imagery

12 servos is a lot, you may want to start with just a few...

wjcroft · July 2016

Sorry, I forgot to ask, is your son disabled? Are you wanting to provide some type of hands free computer interface or robotics? Check out some of the posts on P300 speller programs, they allow the subject to type in arbitrary text. So you could possibly have some scheme for activating different movements with a menu of speller based commands.

http://openbci.com/forum/index.php?p=/search&Search=speller

WhiteT · July 2016

now he's partially but soon he'll be fully
Thanks for your help I'm working on P300 speller currently
I'll see if hex bug project helps me thank you

wjcroft · July 2016

The spellers would potentially provide more reliability and functionality than the other approaches mentioned. There are commercial systems in this area, as an indication of real world applications,

https://www.google.com/search?q=p300+speller

http://www.gtec.at/Products/Complete-Solutions/intendiX-Specs-Features

WhiteT · July 2016

I understand speller is more reliable but i dont know if i could really control servos with it
i've zero knowledge of electronics

wjcroft · July 2016

See page 69 in the pdf linked by the gtec.at site above,

http://www.gtec.at/content/download/4911/40118/version/4/#

It says,

intendiX® SPELLER uses an intelligent algorithm to deter-
mine whether the user wants to use the system, so it does-
n’t spell accidentally. In addition to writing text, the patient
can also use the system to trigger an alarm, let the com-
puter speak the written text, print out or copy the text into
an e-mail or to send commands to external devices.

To control external devices a special extension tool called
“extendiX” serves as an interface. extendiX runs on a separate
computer that controls other devices and applications such
as TVs, music, assistive robots, games and so on. extendiX
just receives commands from intendiX® SPELLER via UDP and
starts/executes the corresponding application or batch.

biomurph · August 2016

@WhiteT

I think your best best would be to modify the Hex Bug control code, and use an Arduino to control the servo(s)

Adafruit makes this great servo motor controller

https://www.adafruit.com/products/1411

The biggest issue in controlling servos is that they require at least 5V and alot of current.

cfausn · August 2016

@WhiteT I've been working with EMG lately as well, and I think that your son could benefit from that type of work. As long as basic muscular movements are available like jaw clenches, brow furrows, winking, and possibly even tongue movements you could get some very accurate commands from the GUI. Check out my blog here for some more info.

control 12 servos with my son's eeg

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