GSR Skin Current Sensor V2.0 for Real-time Stress & Emotion Monitoring
π§ GSR Skin Current Sensor V2.0
Emotion β’ Stress β’ Biofeedback Sensor
πΌοΈ Infographic Overview
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β GSR SKIN CURRENT SENSOR V2.0 β
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β π Measures : Skin Conductance (EDA) β
β β‘ Voltage : 3.3V β 5V β
β π Output : Analog Signal β
β π§ Principle : Sweat β Conductivity β
β π Electrodes : 2 (finger contact) β
β π Current : ~1mA β
β π Size : ~34 Γ 25 mm β
β π― Use : Stress & Emotion Track β
βββββββββββββββββββββββββββββββββββββββββββββββπ What is GSR Sensor?
The GSR (Galvanic Skin Response) Sensor V2.0 measures electrical conductance of human skin, which changes based on sweat gland activity.
π When emotions like stress, excitement, or fear occur:
Sweat increases
Skin conductivity rises
Sensor detects this change
This makes it useful for emotion recognition and stress monitoring systems
βοΈ Working Principle
Finger 1 βββ
β Small Voltage Applied
Finger 2 βββ
β
Skin Resistance Changes
β
Current Changes
β
Analog Output Signal
β The sensor applies a tiny safe voltage across the skin
β Measures current flow between two electrodes
β Converts it into a readable signal
π¬ Scientific Concept
π Also called:
EDA (Electrodermal Activity)
SCR (Skin Conductance Response)
π Relationship:
More stress β more sweat β higher conductance
Relaxed state β dry skin β lower conductance
β This is why GSR is used in:
Lie detectors
Psychological research
Biofeedback systems
β¨ Key Features
β High sensitivity to small physiological changes
β Real-time analog output
β Low power consumption (~1 mA)
β Compact & lightweight design
β Easy integration with Arduino / Raspberry Pi
β Improved noise stability (V2.0 upgrade)
π Pin Configuration
VCC β 3.3V / 5V
GND β Ground
SIG β Analog Output (to MCU)
π Output Behavior
| Condition | Skin State | Output Signal |
|---|---|---|
| π Relaxed | Dry | Low signal |
| π° Stressed | Sweaty | High signal |
| π± Excited | Very moist | Highest |
π§ Smart Capabilities
π Real-Time Monitoring
Continuous tracking of emotional state
π Biofeedback Ready
Can trigger:
Alarms
LEDs
Apps
π Data Logging Compatible
Works with ADC for graphs & analysis
π οΈ Applications
πΉ Stress monitoring systems
πΉ Emotion detection projects
πΉ Wearable health devices
πΉ Meditation & relaxation tools
πΉ Human-computer interaction
πΉ Gaming & VR feedback systems
β‘ Advantages
β
Non-invasive measurement
β
Real-time response
β
Simple circuit
β
Low cost
β
Easy to use for students & research
β οΈ Limitations
β Not 100% accurate for emotions (needs AI/data processing)
β Affected by:
Temperature
Skin dryness
Movement
β Requires good electrode contact
π Arduino Connection Example
GSR Sensor β Arduino
VCC β 5V
GND β GND
SIG β A0
π Then read analog values:
int gsr = analogRead(A0);
Serial.println(gsr);
π Real-Life Insight
GSR is widely used in AI-based emotion recognition systems, where machine learning analyzes patterns to classify emotional states with reasonable accuracy
π‘ Pro Tips
β Use clean, dry fingers for consistent readings
β Apply light pressure on electrodes
β Filter noise using:
Moving average
Low-pass filter
β Combine with:
Heart rate sensor β€οΈ
Temperature sensor π‘οΈ
π For better emotion detection accuracy
π§Ύ Summary
The GSR Skin Current Sensor V2.0 is a powerful biometric tool that converts human emotional changes into electrical signals. Itβs perfect for:
β Stress detection
β Biofeedback systems
β Wearable tech projects
β AI-based emotion analysis
