Grove GSR Skin Current Sensor Galvanic Response Emotion Arduino Module

Grove GSR Skin Current Sensor Product Overview

The Grove GSR Skin Current Sensor is a biosignal detection module from Seeed Studio based on the Galvanic Skin Response (GSR) principle. The module measures changes in skin surface conductivity by attaching two electrodes to adjacent fingers, detecting sympathetic nervous system activity during emotional tension or strong facial expressions. Its scientific principle is the same as that used in high-sensitivity lie detectors — when a person experiences emotional tension or strong expressions, sympathetic nervous system activity increases, promoting sweat gland secretion and raising skin conductivity. The module outputs an analog voltage signal, features an onboard potentiometer for sensitivity adjustment, and is compatible with 3.3V and 5V systems, supporting Arduino, Raspberry Pi, STM32, and other mainstream platforms. With compact dimensions of just 20×20mm and a weight of 29g (gross), it is widely used in emotion recognition, biofeedback, psychophysiological research, human-computer interaction, and wearable devices.

Grove GSR Skin Current Sensor Key Features

Galvanic Skin Response (GSR) Detection Principle: Based on the scientific principle of skin conductivity variation with emotional state, reflecting sympathetic nervous system activity through skin surface conductivity changes.

High-Sensitivity Analog Output: Outputs an analog voltage signal proportional to skin conductivity, readable via ADC pins on Arduino and other development boards for simple and intuitive data acquisition.

Adjustable Sensitivity: Onboard potentiometer allows users to fine-tune detection sensitivity for different test subjects and scenarios, achieving optimal measurement results.

Electrode Finger Strap Design: Includes electrode finger straps that comfortably attach to adjacent fingers, ensuring stable skin contact and reliable data acquisition.

Wide Voltage Compatibility: Supports 3.3V and 5V power, compatible with both 3.3V systems (Raspberry Pi, ESP32) and 5V systems (Arduino UNO).

Standard Grove Interface: Features a 4-pin Grove connector (GND, VCC, NC, SIG) for direct connection to Seeed Studio's Grove expansion boards without soldering.

Ultra-Compact Size: Measures just 20×20×9.8mm, suitable for space-constrained wearable devices and portable projects.

Plug-and-Play: Standardized interface and complete Arduino library support enable rapid out-of-the-box development.

Grove GSR Skin Current Sensor Applications

The Grove GSR Skin Current Sensor is widely used in:

Emotion Recognition & Psychophysiological Research: Real-time monitoring of emotional tension and stress levels for psychological experiments and emotional analysis

Biofeedback & Relaxation Training: Helping users manage stress and practice relaxation through GSR signal feedback

Human-Computer Interaction & Smart Wearables: Adding emotional perception capabilities to smart wearable devices

Lie Detector Principle Demonstration: Visually demonstrating the relationship between skin conductance and emotional states for science education

Gaming & Entertainment Applications: Adjusting game difficulty or feedback based on player emotional states

User Experience Testing: Evaluating user emotional responses and tension levels during product interaction

Grove GSR Skin Current Sensor Advantages

Scientifically Proven Principle: Based on the well-validated Galvanic Skin Response (GSR) physiological principle, using the same detection mechanism as professional lie detectors and psychophysiological research equipment.

High Sensitivity & Adjustability: Onboard sensitivity potentiometer allows users to optimize detection for different individuals and applications, achieving optimal signal quality.

Plug-and-Play Grove Ecosystem: The standard Grove interface enables seamless integration into Seeed Studio's Grove sensor ecosystem, compatible with 300+ sensor modules, greatly simplifying hardware connections and development.

Analog Output for Easy Data Analysis: Continuous analog voltage output can be easily captured via ADC and analyzed in real-time with Arduino, Raspberry Pi, and other platforms.

Ultra-Compact for Wearables: 20×20mm ultra-compact size for easy integration into wearables, smart bands, and other portable projects.

Rich Open-Source Resources: Seeed Studio provides complete Arduino libraries, example code, and Wiki documentation for rapid development and customization.

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FAQs:

1. What does this sensor mainly measure?
   Answer: It measures electrical conductance of the human skin surface, which changes with sweat gland activity triggered by emotions.

2. How to connect the sensor to a development board?
   It uses the Grove 4-pin standard interface, allowing direct connection to Seeed Base Shield or Arduino boards without soldering.

3. What is the required supply voltage?
   It supports a dual input range of 3.3V and 5V, ensuring compatibility with most mainstream microcontrollers.

4. How are the included accessories used?
   The module comes with electrode finger straps that attach to two adjacent fingers to measure skin conductivity.

5. How to adjust the sensitivity?
   A small potentiometer is located on the board, which can be manually adjusted to tune the signal gain.

6. What are the typical application scenarios?
   It is used in biofeedback projects, emotional state detection experiments, sleep quality research, and interactive devices.

7. Does it have reference code in the Grove ecosystem?
   Yes, Seeed Studio provides official Arduino sample code libraries and tutorials on their Wiki platform.

8. Is it plug-and-play?
   Yes. The Grove system ensures it is plug-and-play, allowing rapid physical prototyping without manual wiring.

9. What are the dimensions of the module?
   The PCB size measures 20mm by 20mm, with a total height of approximately 9.8mm.

10. Are there any limitations on its use?
    It is not for medical diagnosis and should be used for indicative biofeedback. The moisture level of the skin can affect the data.