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A sEMG Brain-Machine Interface.

A wearable BMI developer kit for the hackers/makers community to use for the greater good.

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I have been working with a friend on a BMI project since december 2019. We are true believers in the near revolution of brain machine interfaces (BMI) but BMIs available today are either invasive, constraining or awkward (in particular EEGs), and we believe surface EMG is the way to go. Although electromyography is an old technology, its potential for BMI has not been realized until recently and interest is growing. So we built an armband which possesses electrodes that are held in contact with the user’s skin. The electrodes, combined with a specialized acquisition/processing hardware, intercept and measure electrical signals propagating in the muscles when the user intends to move his/her hand (with or without actual movement). The processed data is transmitted via bluetooth to the device that the user wishes to control, and translated there into actual commands (moving a cursor, typing text, etc...). Please see our video !

Our prototype is already able to generate state of the art recordings, but you guessed it, the bottle neck is how to make sense of all the data. We have tested several methods, from recurrent neural networks on the raw data to simple classifiers on processed data (sliding RMS of the signals,  or sliding covariance matrix of the different channels) etc... 

Do you have any idea on how to interpret sEMG signals into useful computer commands ? Contact us to get your hands on a prototype and implement your ideas.

https://www.youtube.com/watch?v=qNxASDsdeHg

compil.mp4

This video demonstrates our current prototype's ability to control a simple video-game without having to move a finger.

MPEG-4 Video - 37.05 MB - 03/11/2020 at 19:33

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Gitnock wrote 03/22/2020 at 10:12 point

how much would the finished build cost?

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wolfgangouille wrote 03/22/2020 at 22:08 point

Well, depends what the finished product is ! Right now a full prototype costs about $500 in materials. We want this to remain accessible to hobbyists so we are working on making this cheaper.

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Gitnock wrote 03/22/2020 at 22:38 point

Thanks so much for the reply.  \(◎o◎)/   am super excited for a time I could get my hands on this.  good luck

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Drew Pilcher wrote 03/21/2020 at 08:50 point

Extremely cool, but you should share your design.

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wolfgangouille wrote 03/21/2020 at 18:29 point

Yes, we are making it a bit more easy to assemble for the layman first :)

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