I see it's been a while since the possibilty of obtaining Galvanic Skin Respose (GSR, or, I think more commonly: electrodermal activity, EDA) with OpenBCI was discussed. From what I've seen, it's stil

As a bonus I will give away a free GSR sensor.

though. In other words not that the lower the GSR drops, the lower the EEG frequency drops.

I have a GSR biofeedback device:

GSR, Pulse & Breath on the 3 analog pins, and the HEG sensor sampled by one of the 8 EEG channels.

PulseSensor looks perfect for measuring heart rate, and the GSR sensor is detailed above.

You can modify this code to attach another sensor, like your GSR sensor, and include the result in one of the other auxData array positions.

Also found this very simple GSR guide using two finger straps: http://ftmedia.eu/diy-gsr-sensor/

The Search box at lower right of the page will turn up the previous GSR thread,

Not necessarily electrodes, but I would like to be able to measure skin conductance (GSR, Heart rate (ECG) and Breath rate.

4 is enough for neurofeedback with HRV & GSR.

At least two other top-notch commercial products use AC to measure GSR in the same way as electrode impedance is measured but the values of the signal injection capacitors are different from what woul

Mike,It is possible to use the microcontroller ADC inputs and create a GSR sensor.

Cybin, thanks.  Yeah I agree doing GSR with AC avoids the polarization issues.  I think all the commercial clinical grade biofeedback units do this.  And...  If you look at the wide range of Makers ex

There is a very important reason why AC is used when doing GSR. Electrodes represent 1/2 of a battery, they are in fact what are called half cells. Consider an ordinary D-cell battery for instance it

This September 21 addendum to this thread was prompted by another thread discussing the possibility of GSR measurements with the ADS1299.  I referred back to this thread for a historic context.

As I mentioned, this injected current is AC, not DC as is used in most traditional GSR devices.  So may give different results.  You would certainly NOT want to use any conductive solution or paste on

Is there someone who knows how could I inject some current to the electrodes? I know the gtec uses their EEG amplifier to do GSR as well.

Mike, hi.  Yes, GSR is a resistance measurement between two sensors.  EEG is measuring differential microvolts between two sensors.  The ADS1299 has a feature that can be used to measure the AC 'imped

Is there a way to measure GSR (Galvanic Skin Response) with OpenBCI? I understand there is a need to inject some current to the electrode for measuring conductance.