Grove GSR Sensor

Introduction

GSR, standing for galvanic skin response, is a method of measuring the electrical conductance of the skin. Strong emotion can cause stimulus to your sympathetic nervous system, resulting more sweat being secreted by the sweat glands. Grove – GSR allows you to spot such strong emotions by simple attaching two electrodes to two fingers on one hand, an interesting gear to create emotion related projects, like sleep quality monitor.

Specifications

Input Voltage: 5V/3.3V Sensitivity adjustable via a potentiometer External measuring finger cots

Use

Load the code onto the board. Plug the GSR sensor into an AnalogIn port and a buzzer (optional) to a DigitalOut port. Modify the code to reflect your selection. Put the GSR cuffs on, reset the board. The program will initially take 2sec to establish a baseline GSR, then the main program will begin running. The buzzer will go off if a >5% change in GSR happens. This can be triggered by being scared, deep breaths, or any number of other strong emotional responses.

Further Development

Try playing with the delays, gsr baseline, and the delta cutoffs to get a more accurate application. Also try graphing the outputs, you'll be supprised just how easy it is to see when a strong emotional response is triggered. See the Seeed Grove GSR Wiki Page for further details and pretty pictures.