Constant-Voltage Exosomatic EDA Circuit
Applies strictly constant 0.500 V DC across electrodes and converts current to voltage (1.0 V / 10 μS).
Biomedical Engineering / Galvanic Skin Conductance
FREE TO EXPLORELABORATORY 13 · BIOMEDICAL ENGINEERING
Galvanic Skin Response (GSR) & Sympathetic Electrodermal Conductance
Measure skin conductance level (SCL) and phasic skin conductance responses (SCR) across calibrated psychological arousal stimuli using constant-voltage DC bridge circuitry. Explore interactive physiological instrumentation simulation, biomechanics, and biomedical engineering telemetry.
BIOINSTRUMENTATION · BIOSIGNALS · BIOMECHANICS · IMAGING
Your virtual biomedical engineering laboratory.
PHASIC CONDUCTANCE CHANGE ΔG—
PHYSIOLOGICAL & TEST CELL TELEMETRY
Ready to sample with Arousal I = 3.0 units.
Adjust Arousal I, then execute biomedical trial.
Biomedical engineering telemetry and physiological states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity biological and physiological modeling.
Biomedical assumptions and boundary condition limits
The linear arousal model applies across sub-saturation sensory intensities (1.0 to 6.0 units). Evaluated using two un-gelled Ag/AgCl palmar finger electrodes on the distal phalanges of the index and middle fingers with constant 0.500 V DC excitation. Phasic conductance response ΔG is evaluated across calibrated acoustic startle stimulus intensities from 1.0 to 6.0 arbitrary arousal units.
Biomedical apparatus & physiological sensors.
Ag/AgCl Dry Palmar Finger Band Electrodes
Constructed with 1.0 cm² Ag/AgCl contact plates without gel to avoid artificial skin hydration.
Calibrated Acoustic Startle Stimulator
Delivers calibrated white-noise acoustic tone bursts across six standardized intensity levels.
Isolated Low-Noise Biomedical DAQ Unit
Samples conductance waveforms with 24-bit resolution and optical isolation compliant with IEC 60601-1.
Digital Ambient Temperature & Humidity Monitor
Logs room ambient conditions (22.0 °C, 45% RH) to verify stable baseline perspiration.
EDA Peak Detection Software Analyzer
Extracts tonic SCL baseline, peak SCR latency, and phasic amplitude ΔG in microsiemens.
FOLLOW THE METHOD
A reason behind every step.
Measure skin conductance level (SCL) and phasic skin conductance responses (SCR) across calibrated psychological arousal stimuli using constant-voltage DC bridge circuitry. Standardized parameter settings: 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 units.
01
Electrode Placement and Baseline Acclimation
Attach Ag/AgCl electrodes to the palmar surface of the distal phalanges of fingers II and III; allow 10 minutes for baseline thermal acclimation.
02
Constant-Voltage Excitation Verification
Verify with precision DMM that circuit applies exactly 0.500 V DC across the finger electrodes without voltage droop.
03
Tonic Skin Conductance Level (SCL) Logging
Record resting tonic conductance for 2 minutes to confirm a stable baseline (typically 2.0 to 10.0 μS) and absence of spontaneous spikes.
04
Calibrated Stimulus Delivery (Intensity 1.0)
Deliver the initial acoustic stimulus (Level 1.0); identify the phasic SCR wave occurring 1.5 to 2.5 seconds post-stimulus.
05
Phasic Amplitude ΔG Measurement
Compute peak phasic conductance increase ΔG = G_peak - G_onset in microsiemens (μS).
06
Arousal Progression Sequence
Deliver stimuli of intensities 2.0, 3.0, 4.0, 5.0, and 6.0 at randomized 45-second intervals, plotting ΔG against stimulus level to determine k_g.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into biomedical engineering insight.
Points are your recorded observations. The solid regression line validates Galvanic Skin Conductance mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
ΔG = k_g · I_stim = 1.8500 · I_stim
| # | Stimulus Arousal Intensity I_stim (units) | Phasic Conductance Change ΔG (μS) | Stimulus intensity index (units) | Phasic skin conductance ΔG (μS) | Remove |
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