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Grove GSR Sensor

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Last updated 5 years ago

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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

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.

const int GSR=A0;
int sensorValue=0;
int gsr_average=0;

void setup(){
  Serial.begin(9600);
}

void loop(){
  long sum=0;
  for(int i=0;i<10;i++)           //Average the 10 measurements to remove the glitch
      {
      sensorValue=analogRead(GSR);
      sum += sensorValue;
      delay(5);
      }
   gsr_average = sum/10;
   Serial.println(gsr_average);
}
  • 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

Tech Support

Please do not hesitate to contact techsupport@seeed.cc if you require further information.

Resources

!!!Tip More details about Grove modules please refer to

Please click to see all Grove - GSR sensor FAQs.

[PDF]

[PDF]

[PDF]

[PDF]

[PDF]

[Eagle]

[Eagle]

[Datasheet]

Grove System
here
Download Wiki PDF
Grove-GSR v1.0 Sch
Grove-GSR v1.0 PCB
Grove-GSR v1.2 Sch
Grove-GSR v1.2 PCB
Grove - GSR v1.0 Eagle File
Grove - GSR v1.2 Eagle File
LM324 datasheet
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