Grove GSR Sensor
GSR stands 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. It is an interesting to create emotion related projects like sleep quality monitor.
!!!Warning Grove-GSR Sensor measures the resistance of the people, NOT Conductivity!
Version
Product Version | Changes | Released Date |
Grove - GSR_Sensor V1.0 | Initial | June 19, 2013 |
Grove - GSR_Sensor V1.2 | Add C3 100nf between M324PW-TSSOP14 and GND | July 31, 2014 |
Specification
Parameter | Value/Range |
Operating voltage | 3.3V/5V |
Sensitivity | Adjustable via a potentiometer |
Input Signal | Resistance, NOT Conductivity |
Output Signal | Voltage, analog reading |
Finger contact material | Nickel |
!!!Tip More details about Grove modules please refer to Grove System
Platforms Supported
Getting Started
Hardware
Step 1. We need to prepare the below stuffs:
Seeeduino V4.2 | Base Shield | Grove - GSR |
Step 2. Connect the Grove-GSR to A0 on Base Shield.
Step 3. Plug the base Shield into Seeeduino-V4.2.
Step 4. Connect Seeeduino-V4.2 to PC by using a USB cable.
!!!Note If we don't have a Base Shield, don't worry, the sensor can be connected to your Arduino directly. Please follow below tables to connect with Arduino.
Seeeduino | Grove-GSR Sensor |
GND | Black |
5V | Red |
NC | White |
A0 | Yellow |
Software
Step 1. Copy the code into Arduino IDE and upload.
Step 2. Do not Wear the GSR sensor.
Step 3. Click the Tools-> Serial Plotter from Arduino IDE
Step 4. Use the screw driver to adjust resistor until the serial output as 512.
Step 5. Wear the GSR sensor.
Step 6. We will see the below graph. Please deep breath and see the trends.
Human Resistance = ((1024+2Serial_Port_Reading)10000)/(512-Serial_Port_Reading), unit is ohm, Serial_Port_Reading is the value display on Serial Port(between 0~1023)
FAQ
Please click here to see all Grove - GSR sensor FAQs.
Tech Support
Please do not hesitate to contact techsupport@seeed.cc if you require further information.
Resources
[PDF] Download Wiki PDF
[PDF] Grove-GSR v1.0 Sch
[PDF] Grove-GSR v1.0 PCB
[PDF] Grove-GSR v1.2 Sch
[PDF] Grove-GSR v1.2 PCB
[Eagle] Grove - GSR v1.0 Eagle File
[Eagle] Grove - GSR v1.2 Eagle File
[Datasheet] LM324 datasheet
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