[Noisebridge-discuss] tDCS - call for collaboration

Kelly hurtstotouchfire at gmail.com
Thu Feb 9 21:15:09 UTC 2012

I have a friend who has spec-ed this out I believe. I will forward you to him.

The hard part is not stimulating, it's stimulating in the right place.
Published studies use EEG cap locations as their standard usually, so
ideally if you get an EEG cap you can use it to hold the electrode in
the right place during stimulation.


PS. I work in neuro/electrophysiology, feel free to ask me questions
and please be very very moderate in your experiments. I will be at NB
on friday.

On Thu, Feb 9, 2012 at 12:51, Jonathan Toomim <jtoomim at jtoomim.org> wrote:
> I'm working on building a somewhat simple transcranial direct current
> stimulation device. This is a machine which sends a small (~1 mA)
> current through your brain. Such devices are currently (pun not
> intended) being used for neuroscience research, and have been under
> investigation for roughly the last decade. They have the ability to
> enhance (anode) or suppress (cathode) neural activity in the nervous
> tissue underneath the electrode by around 20 to 40%. Depending on where
> you place the electrodes, this can have any of many different cognitive
> effects, like improvements (or reductions) in working memory ability
> (anode on left DLPFC;
> http://www.frontiersin.org/human_neuroscience/abstract/22906).
> tDCS is a new, powerful, and potentially dangerous technology, and as
> such, should be used with caution, and probably shouldn't be used
> without the supervision of a trained neuroscientist. I am a trained
> neuroscientist.
> I've got a design in mind for the electronics. (Op amp/MOSFET-based
> current source controlled by the DAC on an MCU.) I could use help with
> making the electrodes (wet sponges are commonly used), getting the
> circuit off of a breadboard (I'd hate for a current-reducing resistor to
> fall out during use), and potentially programming (either for the MCU or
> for the PC control program/GUI).
> Anyone interested? I'll be at NB today until around 6:15, and again
> probably Saturday and maybe Sunday. I'm a short-haired redheaded dude.
> Jonathan
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