GSR Skin Current Sensor V2.0 for Real-time Stress & Emotion Monitoring

🧠 GSR Skin Current Sensor V2.0
Emotion • Stress • Biofeedback Sensor
🖼️ Infographic Overview
┌─────────────────────────────────────────────┐
│ GSR SKIN CURRENT SENSOR V2.0 │
├─────────────────────────────────────────────┤
│ 📊 Measures : Skin Conductance (EDA) │
│ ⚡ Voltage : 3.3V – 5V │
│ 🔌 Output : Analog Signal │
│ 🧠 Principle : Sweat → Conductivity │
│ 👆 Electrodes : 2 (finger contact) │
│ 🔋 Current : ~1mA │
│ 📏 Size : ~34 × 25 mm │
│ 🎯 Use : Stress & Emotion Track │
└─────────────────────────────────────────────┘
📌 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.
👉 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
⚙️ Working Principle
Finger 1 ──┐
│ Small Voltage Applied
Finger 2 ──┘
↓
Skin Resistance Changes
↓
Current Changes
↓
Analog Output Signal
✔ The sensor applies a tiny safe voltage across the skin
✔ Measures current flow between two electrodes
✔ Converts it into a readable signal
🔬 Scientific Concept
👉 Also called:
EDA (Electrodermal Activity)
SCR (Skin Conductance Response)
📈 Relationship:
More stress → more sweat → higher conductance
Relaxed state → dry skin → lower conductance
✔ This is why GSR is used in:
Lie detectors
Psychological research
Biofeedback systems
✨ Key Features
✔ High sensitivity to small physiological changes
✔ Real-time analog output
✔ Low power consumption (~1 mA)
✔ Compact & lightweight design
✔ Easy integration with Arduino / Raspberry Pi
✔ Improved noise stability (V2.0 upgrade)
🔌 Pin Configuration
VCC → 3.3V / 5V
GND → Ground
SIG → Analog Output (to MCU)
📊 Output Behavior
Condition
Skin State
Output Signal
😌 Relaxed
Dry
Low signal
😰 Stressed
Sweaty
High signal
😱 Excited
Very moist
Highest
🧠 Smart Capabilities
🔄 Real-Time Monitoring
Continuous tracking of emotional state
📉 Biofeedback Ready
Can trigger:
Alarms
LEDs
Apps
📊 Data Logging Compatible
Works with ADC for graphs & analysis
🛠️ Applications
🔹 Stress monitoring systems
🔹 Emotion detection projects
🔹 Wearable health devices
🔹 Meditation & relaxation tools
🔹 Human-computer interaction
🔹 Gaming & VR feedback systems
⚡ Advantages
✅ Non-invasive measurement
✅ Real-time response
✅ Simple circuit
✅ Low cost
✅ Easy to use for students & research
⚠️ Limitations
❌ Not 100% accurate for emotions (needs AI/data processing)
❌ Affected by:
Temperature
Skin dryness
Movement
❌ Requires good electrode contact
🔗 Arduino Connection Example
GSR Sensor → Arduino
VCC → 5V
GND → GND
SIG → A0
👉 Then read analog values:
int gsr = analogRead(A0);
Serial.println(gsr);
📈 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
💡 Pro Tips
✔ Use clean, dry fingers for consistent readings
✔ Apply light pressure on electrodes
✔ Filter noise using:
Moving average
Low-pass filter
✔ Combine with:
Heart rate sensor ❤️
Temperature sensor 🌡️
👉 For better emotion detection accuracy
🧾 Summary
The GSR Skin Current Sensor V2.0 is a powerful biometric tool that converts human emotional changes into electrical signals. It’s perfect for:
✔ Stress detection
✔ Biofeedback systems
✔ Wearable tech projects
✔ AI-based emotion analysis