CJMCU-6701 GSR Skin Sensor Module Analog SPI 3.3V/5V

===========================================================CJMCU6701 GSR SKIN SENSOR MODULE(Analog & SPI | 3.3V / 5V COMPATIBLE)===========================================================MODEL: CJMCU6701 GSR Skin Sensor ModuleMODULE TYPE: Galvanic Skin Response (GSR) sensorINTERFACES: Analog output + SPI digital interfaceOPERATING VOLTAGE: 3.3V or 5V DCSIZE: Approx. 33 18 7mm (compact board):contentReference[oaicite:3]{index=3}----------------------------------------------------------- WHAT IT MEASURES: **Skin electrical conductance** (Galvanic Skin Response) GSR is a measure of **electrodermal activity (EDA)** changesin skin's electrical properties due to sweat and arousal states. Useful for **stress responses, emotional tracking, biofeedback**.:contentReference[oaicite:4]{index=4}------------------ntact the skin. A small signal is applied through the skin. The module detects changes in skin **conductivity** these change with sweat gland activity related to emotional orphysiological arousal. Sensor outputs either an **analog voltage** proportional toconductance or a **digital SPI data stream** for microcontrollers.:contentReference[oaicite:5]{index=5}----------------------------------------------------------- KEY SPECIFICATIONS: **ADC Resolution:** 12bit (high precision A/D conversion) **Sampling Rate:** ~100ksps (fast response) Interfaces: **Analog output** easily read by ADC input pins **SPI digital interface** for precise, filtered data **Voltage compatibility:** accepts 3.3V or 5V logic and supply **PCB size:** ~33mm 18mm 7mm (smallamp; BENEFITS: **Dual interface (Analog + SPI):** Integrates with manymicrocontrollers and systems.:contentReference[oaicite:7]{index=7} **Wide voltage support:** Works with both 3.3V and 5V boards(e.g., Arduino, ESP32, Raspberry Pi via logic conversion).:contentReference[oaicite:8]{index=8} **High sensitivity:** Many physiological changes are detectable.:contentReference[oaicite:9]{index=9} **Compact & lightweight:** Easy to embed in wearables.:contentReference[oaicite:10]{index=10}----------------------------------------------------------- COMMON APPLICATIONS: **Stress & emotion monitoring** (biofeedback) **Wearable health devices** **Human'computer interaction systems** **Research in psychology, physiology, UX studies** **Lie detection / polygraph experiments**:contentReference[oaicite:11]{index=11}--------------------*Analog mode:** connect the analog output to MCU's ADC pin(use proper voltage level range).:contentReference[oaicite:12]{index=12} **SPI mode:** connect SCLK, MOSI/MISO, CS to MCU for digitalreadings (more robust data).:contentReference[oaicite:13]{index=13} Always share **common ground** between sensor and controller.:contentReference[oaicite:14]{index=14}----------------------------------------------------------- USAGE TIPS: Good skin contact is essential electrodes must touch skin. If using SPI, use correct tempo and logic levels. Keep sensor dry and avoid corrosion on electrodes. U