Re: Measuring Electrode Impedance

My eeg set up works fine with test signal ... but is not able to work when
i put on electrodes .... what do u think can be a possible problem ?

Regards
Shashank Shekhar
On Apr 10, 2014 4:53 PM, "Chip Audette" <[email protected]> wrote:

>
> I finally took the time to try to understand the technique for measuring
> the impedance of the electrode-to-skin interface.  It is generally
> considered critical that you get a nice and low impedance at each electrode
> and that the impedance is similar between all of your electrodes.  I've
> been helping to develop the OpenBCI EEG system, so I focused on how the
> ADS1299 chip (which is the core of OpenBCI) approaches impedance
> monitoring.  If you're interested to see how it works, you can check out my
> post and pictures below...
>
>
> http://eeghacker.blogspot.com/2014/04/openbci-measuring-electrode-impedance.html
>
>  Thanks all!
>
>  Chip
>
>
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