How to Use Techtonics GSR Galvanic Skin Response Module Current Sensor Kit V2.0: Examples, Pinouts, and Specs

The Techtonics GSR Galvanic Skin Response Module Current Sensor Kit V2.0 is a specialized sensor designed to measure changes in skin conductivity, which occur due to variations in emotional or physiological arousal. This module detects the electrical conductance of the skin, which is influenced by sweat gland activity and is commonly used as an indicator of stress, excitement, or other emotional states.

This module is widely used in:

• Biofeedback systems: To monitor stress levels and provide real-time feedback for relaxation techniques.
• Wearable technology: For tracking emotional states in fitness and health monitoring devices.
• Research and education: In psychology, neuroscience, and human-computer interaction studies.
• Gaming and entertainment: To create immersive experiences by integrating emotional feedback.

The following table outlines the key technical details of the Techtonics GSR Module:

The module has a simple 3-pin interface for easy integration into circuits. The pin configuration is as follows:

1. Power the module: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to the ground of your circuit.
2. Read the output: Connect the OUT pin to an analog input pin of a microcontroller (e.g., Arduino UNO) to read the sensor's output signal.
3. Attach electrodes: Place the included electrodes on the skin (e.g., fingers or palm) to measure skin conductance. Ensure the electrodes are securely attached for accurate readings.

Below is an example of how to connect the GSR module to an Arduino UNO:

The following code reads the analog output from the GSR module and displays the values in the Serial Monitor:

// Define the analog pin connected to the GSR module
const int GSR_PIN = A0;

void setup() {
  // Initialize the serial communication at 9600 baud rate
  Serial.begin(9600);
}

void loop() {
  // Read the analog value from the GSR module
  int gsrValue = analogRead(GSR_PIN);

  // Print the GSR value to the Serial Monitor
  Serial.print("GSR Value: ");
  Serial.println(gsrValue);

  // Add a small delay to stabilize readings
  delay(500);
}

• Electrode placement: Ensure the electrodes are placed on clean, dry skin for accurate measurements. Avoid areas with excessive hair or oil.
• Avoid noise: Keep the module and wires away from high-frequency noise sources to prevent interference.
• Calibration: The output values may vary between individuals. Perform a baseline calibration for each user to interpret the readings effectively.
• Power supply: Use a stable power source to avoid fluctuations in the output signal.

1. Can this module be used with a 3.3V microcontroller?
   Yes, the module operates within a voltage range of 3.3V to 5V, making it compatible with 3.3V systems like ESP32 or Raspberry Pi Pico.

2. What is the typical range of GSR values?
   The output range depends on the individual's skin conductance. For a 10-bit ADC, values typically range from 0 to 1023, with higher values indicating higher conductance.

3. How do I interpret the GSR readings?
   GSR readings are relative and should be interpreted based on a baseline measurement. Sudden increases in values often indicate emotional arousal or stress.

4. Can I use this module for medical purposes?
   This module is intended for educational and experimental purposes only. It is not certified for medical diagnostics or treatment.

By following this documentation, you can effectively integrate the Techtonics GSR Galvanic Skin Response Module into your projects and gain valuable insights into emotional and physiological states.